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Encyclopedia of Neuroscience, Volume 1

Encyclopedia of Neuroscience, Volume 1

Larry R. Squire | Floyd E. Bloom | Nicholas C. Spitzer | Fred Gage | Tom Albright

(2009)

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Book Details

Abstract

The Encyclopedia of the Neuroscience explores all areas of the discipline in its focused entries on a wide variety of topics in neurology, neurosurgery, psychiatry and other related areas of neuroscience. Each article is written by an expert in that specific domain and peer reviewed by the advisory board before acceptance into the encyclopedia. Each article contains a glossary, introduction, a reference section, and cross-references to other related encyclopedia articles. Written at a level suitable for university undergraduates, the breadth and depth of coverage will appeal beyond undergraduates to professionals and academics in related fields.

Table of Contents

Section Title Page Action Price
e9780080446172v1 1
Associate Editors 8
Subject Classification 14
Table of Contents 48
Foreword 94
Preface 96
Volume 1 98
A 98
Acetylcholine Neurotransmission in CNS 98
Introduction 98
ACh Neurotransmission 98
Anatomy of the Nucleus Basalis 98
Inputs and Neurotransmitter Circuitry of the Nucleus Basalis 98
Topography and Distribution of Cortical Cholinergic Projections 99
Trajectory of Cholinergic Pathways from the Nucleus Basalis to the Cerebral Cortex 99
Cholinergic Synapses in the Cerebral Cortex 99
Cholinergic Receptors in the Cerebral Cortex 99
Cholinoceptive Neurons of the Cerebral Cortex 99
Functionality of Cortical Cholinergic Innervation 99
Memory and Cortical Cholinergic Innervation 100
Attentional State and Cortical Cholinergic Innervation 100
Cortical ACh and Plasticity 100
Cortical Cholinergic Innervation and AD 100
Further Reading 101
Acetylcholinesterase 102
Introduction 102
Genes Encoding the Cholinesterases 102
Structure of the Cholinesterases 103
Inhibitor Interactions 104
Reactivating Agents and Antidotes 104
Further Reading 104
Relevant Website 104
Acetylcholinesterase Inhibitors and Alzheimer's Disease 106
Introduction 106
Preclinical Testing 106
Clinical Efficacy 106
Selection of Relevant Studies 106
Identification of the Methodological Quality of the Studies 107
Assessment of the Relevance of the Methodological Quality for the Results 108
Discussion of the External Validity of the Trials 108
Determination of the Clinical Relevance of Effects and Side Effects as Measured in the Trials 108
Comprehension of the Clinical Experience of Patients, Caregivers, and Health Personnel 109
Consequences of Unclear Clinical Benefit 109
Imprecise Cost Estimates 109
Summary 109
Further Reading 110
Actin Cytoskeleton in Growth Cones, Nerve Terminals, and Dendritic Spines 112
Introduction 112
Early Development 112
Actin Nucleation and Control of Actin Polymerization Rates in Growth Cones 112
Substrate Adhesion and Generation of Traction in Axon Outgrowth and Guidance 113
Roles for Actin-Microtubule Interactions in Early Neurite Development 115
Control of Actin Depolymerization and Turnover in Early Neuromorphogenesis 115
Late Development 115
Actin Organization and Function during the Development of Synapses 115
Actin Dynamics and Spine Morphogenesis 116
Effects of Synaptic Activity on Actin Polymerization in Dendritic Spines 117
Comparing Growth Cones, Dendritic Spines, and Nerve Terminals 117
Further Reading 118
Action Potential Initiation and Conduction in Axons 120
Introduction 120
Ionic Basis of the Action Potential in Axons 120
Sodium and Potassium Channels 120
Sodium-Potassium Pump 120
Structural and Functional Differences of Vertebrate Axons 121
Initiation of the Action Potential 121
Stimulation Required for Electrogenesis 121
Site of Initiation 121
Unmyelinated axons 121
Myelinated axons 122
Conduction in Unmyelinated and Myelinated Axons 122
Unmyelinated Axons 122
Channel subtypes 123
Myelinated Axons 124
Channel subtypes 124
Summary 125
Further Reading 125
Active Perception 128
Perception Is Active Perception 128
Early Vision 128
Active Perception Avoids Marr's 'Ill-Posed Problem' 128
Dynamic Frames of Reference 129
Modeling Active Perception with Robots 129
The Quantal Nature of Data Acquisition 129
Bayes' Rule 131
Virtual Environments 131
Tasks with Sequential Steps 132
Conclusion 133
Further Reading 134
Active Zone 136
Introduction 136
Definition of Active Zones and Functional Participation in the Synaptic Vesicle Cycle 136
Morphology of the Active Zone 136
Molecular Components of the Active Zone 138
Conclusion 141
Further Reading 142
Activity in Visual Development 144
Introduction 144
Sources of Activity in the Developing Visual System 144
Retinotopic Maps in Tectum/Superior Colliculus 145
Eye-Specific Maps in the Lateral Geniculate Nucleus 145
Ocular Dominance Column Formation and Plasticity 146
Molecular Mechanisms of Plasticity 147
Further Reading 148
Activity-Dependent Metabolism in Glia and Neurons 150
Introduction 150
The Glutamate-Glutamine Cycle as the Axis of Metabolic Neuron-Glia Coupling 150
Nuclear Magnetic Resonance Spectroscopy of the Glutamate-Glutamine Cycle and Resulting Quantitative Models of Neuronal-Glial Energetics 151
Nonlinear Coupling between Glucose and Oxygen Utilization in the Activated Brain 152
The Astrocyte-Neuron Lactate Shuttle Hypothesis 153
Subcellular Differentiation of Energy Metabolism within Neurons and Astrocytes 153
Activity-Dependent Metabolic Transitions in Neurons and Astrocytes 156
Further Reading 156
Activity-Dependent Regulation of Glucose Transporters 158
Introduction 158
Temporal Fluctuations in Local Glucose Demand 158
Rate Limitation and Control of Glucose Flux into Brain Cells 159
Mechanisms of Glucose Permeation into the Brain 159
Acute Regulation of Glucose Transport 160
Slower Regulation of Glucose Transport 160
Choice of Functional Probes for the Study of Glucose Transporters 162
Further Reading 162
Activity-Dependent Remodeling of Presynaptic Boutons 164
Introduction 164
Learning-Induced Remodeling and Growth of Sensory Neuron Presynaptic Varicosities during Long-Term Sensitization in Aplysia 164
Long-Term Facilitation Is Associated with Presynaptic Activation of Silent Varicosities and Growth of New Functional Synaptic V 165
5-HT-Induced Regulation of the Presynaptic Actin Network Is a Nodal Point for Learning-Related Synapse Remodeling and Growth 167
Activity-Dependent Modulation of Cell Adhesion Molecules and the Initiation of Learning-Related Presynaptic Growth 167
The Presynaptic Remodeling and Growth of New Synapses Induced by Learning in the Adult Brain May Reutilize Mechanisms That Gove 168
Conclusions 170
Further Reading 171
Addiction: Neurobiological Mechanism 172
Neurocircuitry of Drug Reward, Dependence, and 'Craving' 172
Molecular and Cellular Targets within the Brain Circuits Associated with Addiction 175
Brain Imaging Circuits Involved in Human Addiction 177
Conclusions 177
Further Reading 177
Adenosine 180
Introduction 180
Sources of Adenosine, Its Transport Mechanisms, and Metabolism 181
Receptor Structure, Signaling Pathways, and AR Regulation 182
Receptor Structure 182
Signaling Pathways 182
Regulation 182
Novel and Definitive Ligands 183
Adenosine Agonists 183
Adenosine Antagonists 183
Radioligands 186
Allosteric Modulation 187
Role of ARs in Autonomic Nervous System Disorders 189
Distribution 189
Functions of ARs in the Autonomic and Enteric Systems 189
Genetic Deletion of ARs 191
Further Reading 191
Adenosine Receptor Mediated Functions 194
Introduction 194
Ado Metabolism and Extracellular Ado Concentration 194
Adenosine Receptor Activation 194
A1 Receptor Electrophysiological Postsynaptic Effects 196
A1 Receptor Presynaptic Effects 196
Adenosine-Mediated Homeostasis of Synaptic Glutamate Release 197
Adenosine and Glia 198
Adenosine and Slow-Wave Sleep 198
Further Reading 199
Adenosine Triphosphate (ATP) 202
Early History 202
Purinergic Cotransmission 202
Receptors for Purines and Pyrimidines 203
ATP Release and Degradation 204
Physiology of Purinergic Neurotransmission 205
CNS Control of Autonomic Function 206
Neuron-Glia Interactions 206
Purine Transmitter and Receptor Plasticity 206
Neuroprotection 206
Dual Purinergic Neural and Endothelial Control of Vascular Tone and Angiogenesis 207
Pain and Purinergic Mechanosensory Transduction 207
Special Senses 209
Eye 209
Ear 209
Nasal Organs 209
Further Reading 209
Adenosine Triphosphate (ATP) as a Neurotransmitter 212
Historic Remarks 212
ATP-Mediated Transmission in the Peripheral Nervous System 212
Peripheral Nerves 212
Sensory Neurons 213
Autonomic Neurons 213
ATP-Mediated Synaptic Transmission in the Central Nervous System 214
P2X-Mediated Synaptic Currents 214
Mechanisms of ATP Release 218
ATP Mediates Neuronal-Glial Signaling 218
Conclusions 219
Further Reading 219
Adolescent Brain Development and the Risk of Psychiatric Disorders 222
Introduction 222
Neurobiological Changes of Adolescence 222
Postmortem Data 222
Human 222
Primate 222
Neurotransmitter Systems 222
Structural Neuroimaging 223
Functional Neuroimaging 223
Electroencephalography 223
Positron emission tomography 223
Functional magnetic resonance imaging 223
Summary of Adolescent Brain Changes 224
Relationship to Psychopathology 224
Schizophrenia 224
Substance Abuse 224
Affective and Anxiety Disorders 225
Discussion 225
Future Directions 225
Longitudinal Studies 225
Genetics 226
Sex Differences 226
Multimodal Imaging 226
Translational Research 226
Integration with Social and Educational Science 226
Summary 227
Further Reading 227
Adrenal Steroids: Biphasic Effects on Neurons 228
Introduction 228
Corticosteroid Hormones Affect Some but Not All Properties 228
Biphasic Effects on Neural Properties 228
Two Receptor Types Contribute to the Biphasic Responses in CA1 Neurons 230
Do Corticosteroids Always Induce Biphasic Responses? 230
Further Reading 230
Adrenergic Receptors 232
Introduction 232
alpha1-Adrenoceptors 232
alpha2-Adrenoceptors 234
beta-Adrenoceptors 235
Conclusions 236
Further Reading 236
Adult Cortical Plasticity 238
Introduction 238
Transition from Visual Cortical Development into Adult Cortical Plasticity 238
Use-Dependent Adult Visual Cortical Plasticity 239
Lesion-Induced Cortical Plasticity 239
Plasticity in the Primary Visual Cortex after Cortical Lesions 240
Reorganization of the Primary Visual Cortex Following Retinal Lesions 240
Mechanisms of Lesion-Induced Cortical Plasticity 242
Hyperactivity after Cortical and Retinal Lesions 242
Enhanced LTP-Like Effects 242
Growth Factors and Morphological Correlates of RF Plasticity 243
Further Reading 243
Aggression: Hormonal Basis 246
Hormonal Regulation: Shared Features in Males and Females 246
Hormonal Regulation in the Adult CNS 246
Males 246
Hormonal substrates 246
Neural steroid receptors 247
Neurochemical targets 248
Hormonal modulation of serotonin function 248
Arginine vasopressin 249
Females 249
DHEA: Anti-aggressive mechanism of action 250
Neuroanatomical Substrates 250
Males 250
Females 252
Human Aggression and Aversive Emotional States 252
Males 252
Females 253
Conclusion 254
Further Reading 254
Aggression: Neurochemical and Molecular Mechanisms 256
Overview - Models of Aggressive Behavior 256
Regions and Pathways Mediating Defensive Rage and Predatory Attack 256
Defensive Rage Behavior 256
Predatory Attack Behavior 257
Anatomical and functional relationship between the medial and lateral hypothalamus 257
Limbic Structure-Associated Pathways Modulating Aggression and Rage 257
Amygdala 258
Hippocampal Formation and Septal Area 259
Prefrontal Cortex and Anterior Cingulate Cortex 259
Neurochemical and Molecular Mechanisms of Aggression 260
Neurotransmitters 260
Excitatory neurotransmitters 260
Inhibitory neurotransmitters 260
Substances of abuse and psychotropic drugs 260
Genes and Cytokines 261
Evidence from genetic studies 261
Cytokines and aggression 261
Conclusion 262
Further Reading 262
Aging and Memory in Animals 264
Introduction 264
Cognitive Aging - A Neuropsychological Framework 264
Individual Variability in Cognitive Aging 265
Neurophysiology of Cognitive Aging 266
Horizons in Research on Cognitive Aging 269
Aging beyond the Hippocampus 269
Intervention 270
Further Reading 270
Aging and Memory in Humans 272
Memory Systems 272
Long-Term Memory 272
Declarative Memory 272
Semantic memory 272
Episodic memory 273
Source memory 273
Nondeclarative Memory 274
Procedural memory 274
Priming 274
Short-Term Memory 275
Summary and Course 275
Moderators and Mediators of Cognitive Aging 276
Further Reading 276
Aging of the Brain 278
Possible Causal Factors 278
Structural Changes 278
Biochemical and Metabolic Changes 281
Further Reading 282
Aging of the Brain and Alzheimer's Disease 284
Introduction 284
Cognitive and Memory Impairments in the Elderly 284
Alzheimer's Disease: Clinical Features, Diagnostic Studies, Neuropathology and Biochemistry, and Current Treatments 284
Genetic Causes and Risk Factors for AD 286
Biochemistry of Amyloidosis: APP and the Secretases 287
Animal Models of Aging and AD 287
Genetic Models of Abeta Amyloidosis 288
Models of Tau Abnormalities 288
Targeting of Genes in the Amyloidogenic Pathway 289
BACE1-/-Mice 289
PSEN1-/- Mice 289
Nct-/- Mice 289
Aph-1a-/-Mice 289
Experimental Therapeutics 289
Reductions in BACE1 Activity 289
Inhibition of gamma-Secretase Activity 290
gamma-Secretase Modulation by Nonsteroidal Anti- inflammatory Compounds 290
Abeta Immunotherapy 290
Conclusions 291
Further Reading 291
Aging: Brain Potential Measures and Reaction Time Studies 294
Brain and Cognitive Aging 294
EEG and ERP methods 294
Processing Speed and Reaction Time 294
Sensory Memory 295
Working Memory 295
Declarative: Episodic Memory 296
Conclusions 298
Further Reading 298
Aging: Extracellular Space 300
Gross Anatomic Aging Changes: Extracellular Space 300
Diffusion and Extrasynaptic Transmission 300
Measurements of the Diffusion Parameters of the ECS 300
ECS Diffusion Parameters during Aging 302
Changes in ECS Diffusion Parameters in an APP23 Mouse Model of Alzheimer's Disease 306
Concluding Remarks 307
Further Reading 307
Aging: Invertebrate Models of Normal Brain Aging 308
Introduction 308
Neuronal Insulin-Like Signaling 308
DAF-2 Insulin Receptor Function in the Nervous System 309
DAF-16 Targets 310
Sensory Input and Neuroendocrine Signaling 313
Other Neuroendocrine Mechanisms 313
Concluding Remarks 314
Further Reading 314
Relevant Websites 315
Agnosia 316
Further Reading 317
Agonistic and Affiliative Signals: Resolutions of Conflict 320
Vocal Displays 320
Vocalizations as Aggressive Signals 320
The Resolution of Ambiguity 321
Testing the Reconciliatory Hypothesis 321
The Cognitive Mechanisms Underlying Reconciliation 322
Further Reading 323
Agraphia 324
Further Reading 325
Alcoholism 328
Introduction 328
Diagnosis 328
Epidemiology 328
Clinical Subtypes and Comorbidity 328
Clinical Course and Treatment of Alcoholism 329
Alcoholism-Associated Toxicity 329
Alcoholism and Neural Development 329
Genetic and Environmental Influences on Alcoholism 330
Alcohol Effects on the Central Nervous System 331
Preclinical Models of Alcoholism 331
Genetic Animal Models 331
Models of Alcohol Interactions with Stress and Hormones 332
Models of Alcohol-Induced Toxicity 332
Models of Alcohol Therapeutics 333
Further Reading 333
Relevant Website 333
Alexia 334
Further Reading 335
Allometric Analysis of Brain Size 336
Quantitative Analysis: Convex Polygons 336
Birds and Dinosaurs 337
Mammals 339
Conclusions 341
Further Reading 341
Alternative Splicing in the Nervous System 342
Overview 342
Pre-mRNA Splicing and Alternative Splicing 342
Molecular Mechanisms Regulating Alternative Splicing 342
Neuron-Specific Splicing Regulators 343
Role of Alternative Splicing in the Nervous System 345
Neurological Disorders Associated with Dysregulation and Abnormalities of Pre-mRNA Splicing 345
Neurological Diseases Caused by cis-Acting Splicing Mutations 346
Dementia 346
Muscular dystrophy 346
Ataxia-telangiectasia and neurofibromatosis 346
Spinal muscular atrophy 346
Neurological Diseases Caused by trans-Acting Splicing Defects 346
Retinitis pigmentosa 346
Myotonic dystrophy 347
Prader-Willi syndrome 347
Ataxias 347
Paraneoplastic neurologic disorders 347
Conclusions and Future Perspective 347
Further Reading 348
Aluminum 350
Introduction 350
Background and Chemistry 350
Aluminum Prevalence in the Human Environment 350
Aluminum Entry into Nervous Tissues 350
Aluminum and Neurological Disease 351
Dialysis Encephalopathy 351
Evidence of Aluminum Neurotoxicity following Occupational Exposures 351
Other Studies Suggesting that Aluminum Salts Can Be Neurotoxic, and the Safety of Alum-Containing Vaccines 351
Alzheimer's Disease 351
Mechanisms of Neurotoxicity 352
Oxidative Stress 352
Inflammation 352
Conclusions 353
Further Reading 354
Alzheimer's Disease: An Overview 356
Major Neuropathologic Hallmarks 356
Neurotransmitter Deficits 356
Genetics 357
Abeta and Its Protein Precursor 358
Cytoskeletal Abnormalities 358
Oxidative Stress in AD 359
Conclusions 359
Further Reading 360
Relevant Websites 360
Alzheimer's Disease: Molecular Genetics 362
Introduction 362
beta-Amyloid Precursor Protein 362
The APOE Gene 363
The PS Genes 363
Other AD Genes 363
Animal Models 364
Further Reading 364
Relevant Website 364
Alzheimer's Disease: MRI Studies 366
Introduction 366
Impact 366
Brain Tissue Loss and Cognitive Decline 366
Gray Matter Deficits 367
Maps of Disease Progression 368
What Is Gray Matter Atrophy? 369
Abeta and Neurofibrillary Tangle Maps 369
Conclusion 369
Further Reading 369
Alzheimer's Disease: Neurodegeneration 372
Neuropathology 372
The Abeta Cascade Hypothesis 375
The Tau Hypothesis 376
Timeline of Neurodegenerative Changes in AD 376
Conclusions 377
Further Reading 377
Relevant Website 378
Alzheimer's Disease: Transgenic Mouse Models 380
Creation of Transgenic Mouse Models 380
Biological Foundation 380
Technical Methodology 380
Characteristics of Transgenic Mouse Models 380
APP Transgenic Mice 380
Tau Transgenic Mice 381
Other Types of Transgenic Mice 382
Utility of Transgenic Mouse Models 382
Validity of Transgenic Mouse Models 382
Relevance of Transgenic Mouse Models 383
Testing Experimental Therapies in Transgenic Mouse Models 383
Mechanism of Memory Loss in Transgenic Mouse Models 383
Further Reading 384
Amnesia: Declarative and Nondeclarative Memory 386
Introduction 386
Functional Amnesia 386
Etiology of Neurological Amnesia 386
Anatomy 386
The Nature of Amnesia 387
Anterograde Amnesia 388
Retrograde Amnesia 388
Spatial Memory 388
Nondeclarative Memory 389
Summary 390
Further Reading 390
Relevant Websites 391
AMPA Receptor Cell Biology/Trafficking 392
Subunit Composition of AMPARs 392
AMPAR Trafficking 392
Endoplasmic Reticulum to Synapse Trafficking Pathway 392
Roles of Short and Long AMPAR Subunits 394
Constitutive Cycling of AMPARs Is N-Ethyl Maleimide-Sensitive Factor-Dependent 394
Activity-Dependent Insertion of AMPARs 394
Maintenance of Increased Synaptic AMPARs Requires Slot Proteins 394
AMPARs Interact with a Complex Network of Scaffold Proteins 395
PSD-95 Regulates Synaptic AMPAR Content 395
Transmembrane AMPAR Interacting Proteins Are Required to Anchor AMPARs to PSD-95 395
GRIP and ABP Anchor Short AMPAR Subunits 395
Neuronal Activity Regulated Pentraxin-Induced Clustering of AMPARs 395
AMPAR Endocytosis 396
Lateral Diffusion to Extrasynaptic Clathrin- Mediated Endocytosis Sites 396
Protein Interacting with C Kinase 1 Releases AMPARs from the Synapse 396
Degradation of Synaptic Scaffolds Accompanies AMPAR Internalization 396
Small GTPase Signaling Triggers AMPAR Endocytosis in LTD 397
Fate of Internalized AMPARs Is Subunit Specific 397
Summary 398
Further Reading 398
AMPA Receptors: Disease 400
Introduction 400
GluR2-Lacking AMPARs in Neuronal Death 400
Ischemia 400
Epilepsy 403
ALS 403
Neuronal Injury 404
Mechanisms of Neuronal Death via GluR2- Lacking AMPARs 404
Calcium 404
Zinc 406
Summary 407
Further Reading 407
AMPA Receptors: Molecular Biology and Pharmacology 408
Introduction 408
Expression of AMPA Receptors 408
Topology and Assembly of AMPA Receptor Subunits 408
AMPA Receptor Function 409
Posttranscriptional Modification of AMPA Receptors 411
Alternative RNA Splicing 411
RNA Editing 411
Posttranslational Modification 412
Phosphorylation of AMPA Receptors 412
Pharmacology of AMPA Receptors 412
AMPA Receptor Agonists 412
AMPA Receptor Competitive Antagonists 412
AMPA Receptor Noncompetitive Antagonists 413
Positive Allosteric Modulators 413
Pore-Blocking Molecules 414
Further Reading 415
Relevant Website 415
Amphetamines 416
Molecular Mechanisms 416
Behavioral Effects 418
Acute Administration 418
Chronic Administration 419
Sensitization 419
Tolerance 419
Psychosis 419
Neurotoxicity 420
Further Reading 420
Amphibian Peptides 422
Amphibian Skin Opioids 422
Origin of the Amphibian Skin Opioids 422
Amphibian Opioids and Opioid Receptors 424
Bv8-Prokineticins 427
Bv8-Related Neuropeptides 427
Bv8-Prokineticin Receptors 428
Further Reading 429
Amygdala: Contributions to Fear 432
History 432
Anatomy of Fear 432
Innate Fear 434
Learned Fear 435
Pathological Fear 436
Further Reading 437
Amygdala: Structure and Circuitry in Primates 438
Introduction 438
Structure 438
Intrinsic Connections 438
Cortical Connections 438
Sensory Cortex 438
Perirhinal and Parahippocampal Cortex 439
Entorhinal Cortex 440
Prefrontal Cortex 440
Subcortical Connections 440
Basal Forebrain 440
Striatum 440
Thalamus 440
Hypothalamus 441
Brain Stem 441
Chemoarchitecture 441
Function 441
Further Reading 441
Amygdala: Structure and Circuitry in Rodents and Felines 444
Introduction 444
Main Components of the Amygdala: Structure, Cell Types, and Connectivity 444
Cortex-Like Nuclei of the Amygdala 444
Basolateral Complex 444
Central Nucleus 445
Intercalated Cell Masses 446
Electroresponsive Properties of Amygdala Neurons 446
Basolateral Complex 446
Central Nucleus 447
Intercalated Cell Masses 447
Neuronal Interactions between the Basolateral Amygdala and Central Nucleus 447
Intrinsic Control of Neuronal Excitability and Plasticity within the Basolateral Amygdala 447
Transfer of Sensory Inputs from the BLA to the CE 448
Gating of BLA Projections to the CE by Intercalated Neurons 448
The Amygdala Mediates the Facilitation of Memory by Emotions 449
Further Reading 450
Amyloid: Vascular and Parenchymal 452
Introduction 452
Aging of the Brain and Cerebral Arteries 452
Changes in the Brain Associated with Dementia 452
Intracellular Protein Deposits 452
Accumulation of Tau Protein 452
Accumulation of Synuclein 453
Accumulation of Huntingtin 453
Deposition of Amyloid in the Extracellular Spaces of the Brain 453
Accumulation of Amyloid Proteins in the Brain in Alzheimer's Disease 454
Elimination of Abeta from the Brain 454
Perivascular Route for the Elimination of Interstitial Fluid and Abeta from the Brain 454
Pathways for the Drainage of CSF 455
Failure of Elimination of Abeta from the Brain with Advancing Age and Alzheimer's Disease 455
Consequences of Amyloid Deposition in the Brain and Vessel Walls 456
Intracerebral Hemorrhage 456
Dementia 457
Fluid in Subcortical White Matter 457
Genetic Factors in Alzheimer's Disease and Cerebral Amyloid Angiopathy 457
Immunotherapy for Alzheimer's Disease 458
Conclusions 458
Further Reading 458
Amyotrophic Lateral Sclerosis (ALS) 460
Introduction 460
Epidemiology 460
ALS-P arkinsonism-Dementia Complex 460
Familial or Hereditary ALS 461
Histopathology 461
Pathogenic Mechanisms 461
Clinical Features and Clinical Course 463
Management 464
Clinical Trials and Emerging Therapies 464
Further Reading 465
Amyotrophic Lateral Sclerosis (ALS): Disease Mechanisms 466
Amyotrophic Lateral Sclerosis 466
Mechanisms of Motor Neuron Degeneration 466
Excitotoxicity 466
Mitochondrial Dysfunction 466
Protein Aggregation 468
Neurofilaments and Axonal Transport 468
Growth Factor Signaling 469
Neuroinflammation/Glial Activation 469
Summary 470
Further Reading 470
Relevant Website 470
Angelman Syndrome 472
Introduction 472
Clinical Background 472
Molecular Genetics of AS 472
Deletion 472
Uniparental Disomy 473
Imprinting Defect 473
UBE3A Mutation 473
Negative Molecular Studies 473
Molecular Biology of AS 473
Clinical Difference in Classes of AS 474
Mechanisms of Genetic Imprinting 474
Imprinting of the Prader-Willi Syndrome/AS Region 475
Gene Repression of UBE3A 476
Tissue-Specific Imprinting 476
Summary 476
Further Reading 477
Angiotensin Actions on and within Brain 478
Overview 478
Circulating Angiotensin and Its Actions on the Brain 478
Generation of Circulating Angiotensin 478
Centrally Mediated Cardiovascular Effects of Circulating Angiotensin 480
Thirst 480
Salt Appetite 481
Vasopressin Secretion 481
Renal Sympathetic Nerve Activity 482
Actions of Centrally Generated Angiotensin on the Brain 482
Generation of Angiotensin in the CNS 482
Angiotensin Receptors within the CNS 482
Effects of Centrally Administered Angiotensin II 483
Thirst and Vasopressin Secretion 483
Sodium Appetite 484
Arterial Pressure 484
Natriuresis 484
ACTH Secretion 484
Body Temperature 484
Memory 485
Cerebral Blood Flow 485
Further Reading 485
Angiotensin II 486
Introduction 486
Generation of Systemic Angiotensin II 486
Stimuli for Renin Secretion and Angiotensin Generation 487
Angiotensin Receptors 487
Subtypes and Structure 487
Location of AT1 Receptors in the CNS 488
Intracellular Signaling 488
Central Actions of Circulating Angiotensin 489
Thirst 489
Salt Appetite 489
Vasopressin Secretion 490
Renal Sympathetic Nerve Activity 490
Brain-Derived Angiotensin 490
Angiotensin Generation in the Brain 490
Actions of Brain-Derived Angiotensin Peptides on Fluid and Electrolyte Balance 491
Further Reading 492
Animal Communication: Honesty and Deception 494
Definitions 494
Context of Deception 494
A Brief History 495
Classifying Signals Based on the Type of Cost That Guarantees Honesty 495
Handicap Signals 496
Index Signals 497
Conventional Signals 500
Do Animals Cheat? 501
Further Reading 502
Animal Intelligence: The Search for Animal Intelligence 504
Introduction 504
Stimulus-Bound Concepts 504
Abstract Concept Learning 506
Memory 507
Further Reading 511
Animal Models of Alzheimer's Disease 512
Introduction 512
Genetically Modified Animal Models 512
APP Mouse Models and Abeta-Related Pathology 512
Mouse Models with Mutations in the Abeta Region 514
ApoE Mouse Models 515
Tau Mouse Models 515
Other Mouse Models 516
Conclusions 517
Further Reading 517
Relevant Website 518
Animal Models of Amnesia 520
Early Contributions to the Study of Memory: The Pioneers 520
Amnesia: The Paradox and Animal Models 520
Rodent Models of Memory Function 520
Nonhuman Primate Models of Memory Function: Medial Temporal Lobe 522
Nonhuman Primate Models of Memory Function: Prefrontal Cortices 524
Medical Temporal and Prefrontal Interactions? 524
Conclusion 524
Further Reading 525
Animal Models of Huntington's Disease 526
N-Terminal Exon-1 Transgenic Mouse Models 527
Full-Length Transgenic Mouse Models 529
Knockin Models 532
Conclusion 532
Further Reading 532
Relevant Website 533
Animal Models of Inherited Retinal Degenerations 534
Introduction 534
Organization of the Retina 534
Interaction of Genetically Induced Photoreceptor Death with Normal Photoreceptor Death 535
Insights into the Diversity of Genetically Induced Photoreceptor Death 536
Why Are Photoreceptors Selectively Vulnerable to Mutations in Ubiquitously Expressed Genes? 536
Interactions with Retinal Cell Biology 537
Rod-Cone Interdependence 537
Pathways to Therapy 538
Gene replacement therapy 538
Stem cell or progenitor cell therapies 538
Retinal transplantation 539
Pharmaceutical interventions 539
Light restriction 540
Antioxidant therapy 540
Near-infrared radiation 540
The Range of Animal Models of Human Diseases 540
Further Reading 543
Relevant Websites 544
Animal Models of Motor and Sensory Neuron Disease 546
Motor and Sensory Tracts 546
Gene Deletion ('Knockout') and Transgenic Mouse Models 546
Neurodegeneration in Human 546
Motor Disease 546
Amyotrophic lateral sclerosis 546
Spinal muscular atrophy 550
Motor and Sensory Disease 550
Charcot-Marie -Tooth 550
Giant axonal neuropathy 551
Conclusion 551
Further Reading 551
Animal Models of Parkinson's Disease 552
Introduction 552
PD 552
DA Depletion 552
Reserpine 552
Nigral Cell Loss 553
6-Hydroxydopamine 553
1-Methyl-4-Phenyl-1,2,3,6-Tetrahydropyridine 554
The MPTP mouse model 554
The MPTP primate model 555
Environmental Toxin Models 556
Rotenone 557
Paraquat and maneb 557
Protein Aggregation 557
Transgenic Animals 557
Alpha-synuclein transgenic models 557
Parkin and ubiquitin C-terminal hydrolase L1 transgenic models 558
Viral Vector-Delivered alpha-Synuclein 558
Other PD Models 558
Lipopolysaccharide 558
Aged Animals 558
Animal Models of Dyskinesia 558
Conclusions 559
Further Reading 559
Animal Models of Stroke 562
Introduction 562
Can Animal Models Mimic Human Stroke? 562
Cerebral Ischemia Models: Global versus Focal Ischemia 563
Global Cerebral Ischemia 563
Complete global ischemia 563
Incomplete global ischemia 564
Focal Cerebral Ischemia 565
Middle cerebral artery occlusion 565
Common carotid artery occlusion 567
Pial strip 568
Photothrombosis 568
Embolic 568
Endothelin 568
Hemorrhagic Stroke Models 569
Conclusion 569
Further Reading 569
Animals and the Biology of Music 570
Introduction 570
Terms and Definitions 570
Animal Song 571
Mechanisms Underlying Complex Learned Vocalizations 572
Animal Drumming 573
Ape Drumming 574
Conclusions 574
Further Reading 575
Anterior-Posterior Spinal Cord Patterning of the Motor Pool 576
Introduction 576
Anatomical Organization of Motor Neuron Cell Bodies and Their Axonal Projections 576
Classical Studies on Motor Neuron Development in the Chick 576
Positional Information and Cell Type Specification in the Spinal Cord 577
Establishing Patterns of Hox Gene Expression along the Rostrocaudal Axis 578
Hox Proteins Function in the Specification of Segmentally Restricted Motor Columns 579
Hox Transcription Factors and Motor Pool Identity 580
Identification of Motor Pools at Early Stages by Transcription Factor Expression 580
Hox Proteins and Motor Pool Rostrocaudal Positional Specification 581
Hox Proteins and the Intrasegmental Diversification of Motor Pool Identities 581
Conclusions 582
Further Reading 583
Antipsychotic Drugs 584
Introduction 584
Conventional Neuroleptics 584
Treatment of Acute Psychotic Exacerbations 584
Preventing Psychotic Relapse 585
Long-Acting Injectable Preparations 585
Tardive Dyskinesia 586
Clozapine 586
Newer Atypical Antipsychotic Drugs 587
Large Comparative Trials 587
Summary 588
Further Reading 589
Anxiety Disorders 590
Introduction 590
Phenomenology 590
Epidemiology 590
Diagnosis and Evaluation 590
DSM-IV and ICD-10 590
Categorical and Dimensional Approaches 591
Rating Scales 591
Neurobiology 591
Neurocircuitry 591
Neurochemistry 592
Neurogenetics 592
Treatment 593
Pharmacotherapy 593
Psychotherapy 593
Novel Treatments 593
Conclusion 593
Further Reading 594
Anxiety: Drug Therapy 596
Introduction 596
Mechanisms of Drug Action 596
Serotonergic Mechanisms 596
Noradrenergic Mechanisms 597
GABAergic and Glutamatergic Mechanisms 598
GABA 598
Glutamate 598
Corticotropin Releasing Hormone and Peptidergic Systems 599
Pharmacotherapeutic Strategies 599
GAD 599
Panic Disorder 601
SAD 602
OCD 603
PTSD 604
Further Reading 605
Apelin 606
Discovery 606
Structure and Processing of the Apelin Precursor 606
Apelin Receptor Internalization and Signaling Cascades 606
Distribution of Apelin and Its Receptor in Adult Rat Brain 607
Topographical Distribution of Apelin Immunoreactivity 607
Expression of Apelin Receptor mRNA 607
Apelin: Physiological Actions within the Brain and Anterior Pituitary Gland 608
Involvement of Central Apelin in the Regulation of Food Intake 608
Role of Peripheral Apelin in Feeding and Digestion 608
Involvement of Apelin in Regulation of the Hypothalamic-Adrenal-Pituitary Axis 609
Involvement of Apelin in Maintenance of Body Fluid Homeostasis 610
Peripheral Cardiovascular Actions 613
Conclusions and Pathophysiological Implications 613
Further Reading 613
Aphasia: Sudden and Progressive 614
Introduction 614
Clinical Examination 614
Aphasias of Cerebrovascular Origin 615
Wernicke's Aphasia 615
Broca's Aphasia 615
Global Aphasia 615
Conduction Aphasia 615
Nonfluent Transcortical Aphasia (Transcortical Motor Aphasia) 616
Fluent Transcortical Aphasia (Transcortical Sensory Aphasia) 616
Isolation Aphasia 616
Anomic Aphasia 616
Pure Word Deafness 616
Pure Alexia without Agraphia 616
Neurodegenerative Aphasia 616
Clinical Presentation and Diagnosis 617
Language in PPA 617
Pathophysiology 617
Neuropathology 617
Further Reading 618
Apoptosis in Nervous System Injury 620
CNS Injury - Overview 620
Apoptosis - Introduction 620
Molecular Mechanisms of Apoptosis in CNS Injury 621
Neuronal Apoptosis in CNS Injury 622
Oligodendrocyte Apoptosis in CNS Injury 623
Role of Microglia in Neuronal and Oligodendrocyte Apoptosis 623
Role of Astrocytes in Apoptosis after CNS Injury 624
Summary 625
Further Reading 625
Relevant Websites 626
Apoptosis in Neurodegenerative Disease 628
Apoptosis 628
Molecular Regulation of Apoptosis 628
Caspases 628
Bcl-2 Family 628
Extrinsic versus Intrinsic Death Pathway 629
Apoptosis and Neurodegeneration 630
Alzheimer's Disease 630
Parkinson's Disease 631
Huntington's Disease 632
Amyotrophic Lateral Sclerosis 633
Nonapoptotic Neurodegeneration 633
Summary 634
Further Reading 634
Appetitive Systems: Amygdala and Striatum 636
Introduction 636
Anatomical Routes for Amygdalar-Striatal Interactions 636
Corticostriatal Circuitry 636
Extended Amygdala 637
Function of Amygdala-Striata Interactions 637
Overview 637
The Basolateral Amygdala and Stimulus-Affect Learning 639
The Central Amygdala and Conditioned Anticipatory Arousal 639
The Striatum as a Site of Integration and Selection 640
Mesolimbic Dopamine Contributes to Both Motivational Learning and Performance 640
Amygdalar-Striatal Interactions and Drug Addiction 641
Summary 641
Further Reading 642
Apraxia: Disease 644
Introduction 644
Imitation of Gestures 644
Production of Communicative Gestures on Command 646
Use of Single Tools 646
Multistep Actions with Multiple Tools and Objects 647
The Praxis System 648
Further Reading 648
Apraxia: Sensory System 650
Historical Background 650
Limb Apraxia Subtypes 650
LKA 650
IA 650
Conceptual Apraxia 650
IMA 651
Disconnection and Dissociation Apraxias 652
Outstanding Issues in Diagnosis of Apraxia Subtype 653
Relevance of Recognition and Imitation Deficits for Diagnosis of IMA versus IA or Conceptual Apraxia 653
Relationship of Object Knowledge to Gesture Representations 653
Functional Implications of Limb Apraxia 653
IMA in View of Recent Developments in the Motor Control Literature 654
Imitation 654
Object-Related Action 654
Spatiomotor Frames of Reference for Action 654
Feedforward and Feedback-Driven Processes in IMA 655
Treatment of Limb Apraxia 655
Testing for Limb Apraxia 655
Conclusions 655
Further Reading 656
Artificial Intelligence 658
Overview 658
Shared Origins in the Postwar Cognitive Revolution 658
Domain-Focused Research That Cuts Across AI and Cognitive Science 658
Role of Formal Logic in AI and Cognitive Science 659
Learning and the Connectionist Approach to Cognitive Science 659
Nature and Nurture: Rules versus Connections 660
Current and Future Trends 661
Further Reading 661
Astrocyte: Calcium Signaling 662
Introduction 662
Identification of Astrocytes by Ca2+ Signals 662
Spontaneous Ca2+ Transients and Oscillations 663
Molecular Mechanisms of Ca2+ Signaling 664
Intra- and Intercellular Ca2+ Signaling 666
Ca2+ Responses to Transmitters and Other Signaling Molecules 667
Ca2+ Responses to Neuronal Activity 667
Functional Significance of Ca2+ Signaling 668
Summary 668
Further Reading 669
Astrocyte: Identification Methods 670
Introduction 670
Astroglial Structure 670
Cell-Type-Specific Gene Expression 670
Glial Fibrillary Acidic Protein: The Main Constituent of Astroglial Intermediate Filaments 670
S100beta and Glutamine Synthetase as Cytosolic Markers of Astrocytes 672
Glutamate Transporters GLAST and GLT-1: The Most Abundant Membrane Proteins of Astrocytes 672
Transgenic Labeling of Astrocytes 672
Electrophysiological Membrane Properties 673
Conclusion 674
Further Reading 674
Astrocyte: Neurotransmitter and Hormone Receptors 676
Background 676
Ionotropic Glutamate Receptors 676
mGluRs 677
gamma-Aminobutyric Acid Receptors 678
GABAB Receptors 678
Purinergic Receptors 678
Glycine Receptors 679
Acetylcholine Receptors 679
Adrenergic Receptors 679
Dopamine Receptors 680
Histamine Receptors 680
Serotonin Receptors 680
Angiotensin Receptors 680
Atrial Natriuretic Peptide Receptors 680
Bradykinin Receptors 681
Endothelin Receptors 681
Opioid Receptors 681
Oxytocin and Vasopressin Receptors 681
Somatostatin Receptors 681
Tachykinin Receptors 681
Thyrotropin-Releasing Hormone Receptors 682
Vasoactive Intestinal Polypeptide Receptors 682
Further Reading 682
Astrocyte: Response to Injury 684
Introduction 684
How Do Astrocytes Fare in the Face of Ischemic-Like Insults? 684
Hypoxia 684
OGD (In Vitro Ischemia) 684
In Vivo Studies ('True' Ischemia) 684
Astrocytic Responses to Ischemic-Like Insults 685
Mitochondrial Dysfunction 685
Reactive Oxygen Species 685
Glutamate Uptake 686
Cell Swelling 687
Apoptosis 688
Conclusions 690
Further Reading 690
Atomic Force Microscopy Methodologies 692
Introduction 692
Atomic Forces and Their Measurement 692
Scanning Modes 693
Image Collection 693
Quantitative Data 694
Limitations and Drawbacks 694
Further Reading 695
Atrial Natriuretic Peptide: Fluid/Mineral Balance 696
Introduction 696
Discovery of the Natriuretic Peptides 696
Control of Natriuretic Peptide Production and Release 696
CNS Localization of NPs and NP Receptors 697
Pharmacologic Effects of the NPs in Brain 698
NPs and Vasopressin Secretion 698
ANF and Thirst 699
ANF and Salt Appetite 699
ANF and Central Autonomic Control 700
Summary 700
Further Reading 700
Attention and Eye Movements 702
What Is Attention? 702
Attention and Gaze Stabilization 703
The Role of Attention in Perception versus the Role of Attention in Smooth Eye Movements 705
Summary: Attention and Gaze Stabilization 706
Attention and Saccadic Shifts of Gaze 706
Eye Position as an Overt Marker of the Locus of Attention 706
Decisions, Attention, and Saliency Maps 708
Saccades and Attention 710
Summary: Attention and Saccades 712
OveralSummary and Conclusion 713
Further Reading 713
Relevant Website 713
Attention Deficit Hyperactivity Disorder 714
Introduction 714
Diagnosis 714
Prevalence 714
Neurobiology 716
Etiology 716
Environmental Agents 716
Food and Food Additives 716
Genetics 716
Treatment 717
Stimulant Medication 717
Side effects 718
Nonstimulant Medication 718
Nonmedication Interventions 718
Treatment sequencing 718
Behavioral parent training 719
Behavioral classroom interventions 719
Social skills training 719
Alternative therapies 719
Further Reading 720
Relevant Websites 721
Attention Deficit Hyperactivity Disorder (ADHD): Methylphenidate (Ritalin) and Dopamine 722
Behavioral Profile of ADHD 722
Clinical Characteristics 722
Cognitive Characteristics 722
Summary 724
Evidence for Dopaminergic Dysfunction in ADHD 724
Therapeutic Action of MPH 724
Hyper- and hypodopaminergic status in ADHD 724
Working hypothesis of dopaminergic dysfunction in ADHD 724
Variability in MPH response 725
Candidate Dopaminergic Genes 725
Variability in ADHD symptoms and MPH response 725
Functional Brain Imaging of MPH Effects 726
Summary 727
Future Direction: Endophenotypes for ADHD 727
Further Reading 727
Attention: Models 730
Introduction 730
Parametric Models for Stimulus Response Properties of Early Visual Neurons 730
Parametric Models for Attentional Modulation of Early Visual Responses 731
Biophysical Models for Attentional Response Modulation 733
Discussion 733
Further Reading 733
Attentional Functions in Learning and Memory 736
Attention and Memory: Conceptual Issues 736
Neuronal Macrosystems Mediating Attentional Functions and Capacities: Major Research Themes 736
Neurotransmitter-Specific Projection Systems in Attention and Learning 737
Ascending Modulatory Systems Mediating Attention: Involvement in Learning 739
Attention and Learning: Relevance for Aging and Neurodegenerative and Neuropsychiatric Disorders 740
Further Reading 742
Attentional Mechanisms in Ventral Pathway 744
Introduction 744
Studying the Manifestations versus the Control 744
Enhanced Processing of Attended Objects: The Beneficial Effects of Spatially Directed Attention 745
Top-Down Control: Biases and Baseline Shifts 746
Coherent Firing at the Population Level 746
Competitive Interactions among Multiple Visual Stimuli 746
Resolving the Competition: Selection and Filtering 747
Top-Down versus Bottom-Up in Selective Attention 748
Feature-Based Attention 749
Gating-Feature Information, or Feature-Selective Attention 749
Conclusions 749
Further Reading 750
Attentional Networks 752
Principles of the Human Attention System 752
Alerting 752
Shifting Selective Attention: Cue Interpretation and Orienting 753
Executive Control 754
Integration of Attentional Processes 756
Further Reading 757
Attentional Networks in the Parietal Cortex 758
Introduction 758
Organization and Connectivity 758
Function 760
Lesions 762
Conclusion 763
Further Reading 763
Attractor Network Models 764
Introduction 764
The Neuron Is a Dynamical System 764
Synaptic Plasticity and Associative Memory 766
Persistent Activity and Working Memory 768
Winner-Take-All and Vector Averaging 772
Time Integration and Categorical Decision Making 772
Concluding Remarks 775
See also 776
Further Reading 776
Audiovocal Communication in Bats 778
Introduction 778
Echolocation versus Communication 778
Eavesdropping 779
Mother-Infant Interactions 779
Acoustic Structure of Social Calls 780
Syllables and Syntax 781
Call Variability 782
Geographic Dialects and Vocal Learning 782
Social Communication Behavior 784
Singing and Babbling 785
Motivational Basis of Call Structure 785
Conclusion 786
Further Reading 786
Auditory/Somatosensory Interactions 788
Introduction 788
Somatosensory Influences on Auditory Cortex 788
Connections between Auditory and Somatosensory Cortex 788
Auditory cortex receives input from somatosensory cortex 788
Responses of bimodal neurons in auditory cortex 788
Activity-dependent plasticity in cortical auditory-somatosensory interactions 789
Somatosensory Influences on IC 790
Connections between IC and Somatosensory Nuclei 791
Inputs from the trigeminal nuclei 791
Bimodal Responses of Neurons in ICX 792
Somatosensory Influences on the CN 792
Connections between CN and Somatosensory Nuclei 792
Inputs from the trigeminal system 792
Projections from other somatosensory structures to the CN 793
Responses of CN Neurons to Stimulation of Somatosensory Pathways 794
Responses of CN neurons to somatosensory stimulation in the absence of sound 795
Multisensory integration in the CN: responses to combined somatosensory and acoustic stimulation 795
Significance of bimodal integration in the CN and beyond 795
Further Reading 796
Auditory Cortex Structure and Circuitry 798
Introduction 798
Organization of Auditory Cortex 798
Thalamic Input 798
Area Parcellation 799
Connections of Auditory Cortex 799
Local Structure of Primary Auditory Cortex 799
Interconnections between Areas of Auditory Cortex 800
Cortical Projections Beyond Auditory Cortex 801
Projections to Subcortical Nuclei 802
Other Circuitry 802
Organization of Specialized Auditory Cortex: Echolocating Bats 802
Physiology of Unspecialized Auditory Cortex 803
Outstanding Questions 804
Further Reading 804
Auditory Cortex: Models 806
Introduction 806
Auditory Cortical Fields 806
General Cortical Mechanisms 806
Encoding of Timbre 807
Pitch Representation in the Cortex 808
Models of Sound Localization 808
Neural Correlates Auditory Scene Analysis 809
Emerging Functional Views of the Cortex 810
The Chameleon Brain 810
Multimodal Influences 811
Feedback and Top-Down and Cognitive Influences 811
Further Reading 811
Auditory Evoked Potentials 812
Introduction 812
AEPs Produced by Brief Stimuli 812
Dependencies on Stimulus Parameters 812
Dependencies on Arousal and Attention 812
Neural Generators of AEPs 813
Magnetic Analog of the AEP 814
Other, Specialized AEPs 814
AEP Correlates of Auditory Perception 815
Further Reading 816
Auditory Localization 818
Basic Concepts and Terms 818
Behavioral Studies of Auditory Localization 818
Parallel Brain Pathways for Processing ITD and ILD 820
Detection and Coding of the ITD 820
Resolution of Phase Ambiguity 822
Processing of ILDs 823
Convergence of Time and Intensity Pathways 823
A Map of Auditory Space 823
A Motor Map for Sound Localization 823
Further Reading 825
Auditory Scene Analysis 826
The Scene Analysis Problem 826
Primitive and Schema-Based Processes 826
ASA as Grouping 827
Sequential Integration and Segregation 827
Factors Contributing to Sequential Segregation 828
Cumulative Effects 828
Van Noorden's Two Boundaries 828
Effects of Sequential Grouping 829
Simultaneous Integration 829
Cues Favoring the Grouping of Simultaneous Components 829
Achievement of Stability in the Face of Unreliable Acoustic Evidence 830
Competition between Sequential and Simultaneous Grouping 830
The Old-Plus-New Heuristic 831
Explanations 831
ASA in Other Animals 832
Computational Auditory Scene Analysis 833
Conclusions 833
Further Reading 833
Auditory System: Central Pathway Plasticity 834
Introduction 834
Developmental Plasticity 834
Effects of Neonatal Cochlear Ablation 834
Changes in Maps of Auditory Space 834
Adult Plasticity 835
Plasticity Induced by Restricted Cochlear Damage 835
Plastic Effects of Cochlear Electrical Stimulation in Profoundly Deaf Animals 837
Plasticity Associated with Various Forms of Learning 838
Plasticity Associated with Environmental Enrichment 838
Plasticity Induced by Microstimulation 839
Plasticity Induced by Direct Activation of Neuromodulatory Systems 839
Cellular Mechanisms of CAS Plasticity 840
Functional Significance of Central Auditory System Plasticity 840
Further Reading 841
Auditory System: Central Pathways 842
Introduction 842
Auditory Brain Stem 842
Cochlear Nucleus 842
Superior Olivary Complex 845
Nuclei of the Lateral Leminiscus 845
Midbrain 846
Auditory Thalamus and Cortex 847
Further Reading 848
Auditory System: Efferent Systems to the Auditory Periphery 850
Olivocochlear Neurons 850
Middle Ear Muscles 851
Olivocochlear and Middle Ear Muscle Reflexes 853
Further Reading 854
Auditory System: Giant Synaptic Terminals, Endbulbs, and Calyces 856
Introduction 856
Endbulbs of Held: Morphology 856
Synapses: Presynaptic Endings 856
Synapses: Postsynaptic Targets 857
Physiology 858
Plasticity 858
Calyces of Held 859
Internal Structure 862
Development 863
Short-Term Synaptic Plasticity 865
Conclusion 866
Further Reading 866
Auditory Systems in Insects 868
The Physical Properties of Sound Waves 868
Diversity of Auditory Mechanisms Within the Class Insecta 868
Diversity of ear location 868
Diversity of ears 869
Purposes of Audition in Insects 869
Central Processing of Auditory Information in Insects 871
Frequency Coding 872
Loudness Coding 873
Encoding Temporal Patterns 873
Sound Localization 873
Cues for Sound Localization 874
Further Reading 875
Autism 876
Autism Spectrum Disorder 876
Prevalence and Etiology 876
Genetic Influences 876
Brain Development 877
Cerebral Enlargement 877
Structural Findings 878
Neurochemical Imaging 879
Autopsy Findings 879
Functional Brain Imaging Studies 879
Social Brain Circuitry 879
Functional Connectivity 880
Summary and Future Directions 880
Further Reading 880
e9780080446172v2 1314
Front Cover 1314
Encyclopedia of Neuroscience 1315
Copyright Page 1318
Senior Editors 1319
Associate Editors 1321
Table of Contents 1325
Foreword 1331
Preface 1333
Volume 2 1335
B 1335
Babinski's Reflex/Sign 1335
Further Reading 1336
BAC Transgenesis: Cell-Type Specific Expression in the Nervous System 1337
What Is a BAC? 1337
Why Are BACs Useful? 1337
How Do We Identify a BAC That Contains a Gene of Interest? 1338
How Do We Obtain BAC Clones? 1339
How Do We Modify These Very Large DNAs? 1339
BAC Transfection into Mammalian Cells 1342
BACs 1343
Further Reading 1344
Relevant Websites 1345
BAC Use in the Study of the CNS 1347
Advantages of Bacterial Artificial Chromosome Transgenic Mice 1347
Generation of the BAC Transgenic Mice 1347
Selection of BACs for Transgenic Studies 1347
Basic BAC Transgenic Construct Design 1348
Engineering BACs by Homologous Recombination in E. coli 1348
Characterization and Preparation of BAC for Transgenic Microinjections 1350
Applications of the BAC Transgenic Approach in Neuroscience Research 1350
Applications to Study Gene Expression and Gene Function 1350
Gene expression and regulation 1350
Dominant genetic studies 1351
BAC rescue of the loss-of-function mutants 1351
Protein tagging for in vivo proteomics 1351
Applications of BAC Transgenesis to Study Neurons and Neural Circuits 1351
Developing Cre/Flp recombinase mice 1351
In vivo electrophysiology and imaging 1352
Cell type-specific expression profiling 1352
Transsynaptic genetic tracing of a neural circuit 1352
Inducible and/or reversible manipulation of neuronal function 1353
Applications to Model Dominant Human Disorders and Study Disease Pathogenesis 1353
Summary 1354
Further Reading 1354
Relevant Websites 1354
Balance and Posture Control 1355
Balance: Definition 1355
Concepts for Understanding Gaze and Posture 1355
Gaze System 1355
Eye Movement Controls 1355
Posture System 1356
Biomechanics of Posture 1356
Postural Movement Patterns 1357
Movement Control Theory 1358
Sensory Inputs to Posture 1358
Organization of Senses 1359
Sensory Organization Theory 1359
Clinical Applications 1359
Medical Necessity 1359
Historical Perspective 1360
Impairment Reduction 1361
Diagnosis 1361
Pathology 1361
Impairment 1361
Applications of Impairment Information 1362
Uncompensated vestibular deficit 1362
Intermittent imbalance of unknown origin 1362
Controlled-outcome studies 1362
Further Reading 1363
Relevant Websites 1363
Balance and Posture Control: Human 1365
Posture as a Fundamental Human Activity 1365
Introduction 1365
Sources of Information for Postural Control 1365
Neural Basis for Multisensory Sources of Balance 1365
Virtual Time to Contact 1366
Upright Posture Control 1366
Quiet Stance Domain 1366
Models 1366
Preprogrammed Reactions 1367
Anticipatory Posture Adjustments 1367
Cortical Control of Human Postural Responses 1367
Behavioral Studies 1367
Brain Imaging Studies 1368
Concluding Comments 1368
Further Reading 1369
Balint Syndrome 1371
Further Reading 1372
Barrel Cortex Circuits 1375
From Whisker to Cortex 1375
Projections to the Primary Somatosensory Barrel Cortex 1376
Local Circuits in the Primary Somatosensory Barrel Cortex 1377
Functional Activation of the Barrel Cortex 1377
Physiological Role of the Barrel Cortex 1378
Perspective 1379
Further Reading 1379
Basal Forebrain and Memory 1381
Introduction 1381
Anatomy and Connections of the Basal Forebrain 1381
The Basal Forebrain and Memory 1382
The Basal Forebrain and Attention 1384
Conclusions 1386
Further Reading 1386
Basal Ganglia and Oculomotor Control 1387
Oculomotor Control by the Basal Ganglia 1387
Neural Circuits in the Basal Ganglia for Oculomotor Control 1387
Caudate Nucleus 1388
Substantia Nigra Pars Reticulata 1390
Role of the Basal Ganglia in Reward-Oriented Eye Movement 1391
Dopaminergic Modulation of Information Processing in the Caudate Nucleus 1392
Further Reading 1395
Basal Ganglia: Acetylcholine Interactions and Behavior 1397
Introduction: Cholinergic Neuromodulation in the Striatum 1397
Physiological Studies of Striatal Cholinergic Cells 1398
TAN Encoding of Behavioral Events 1398
Network Properties of TANs 1399
The Functional Organization of TANs' Synaptic Inputs 1399
TANs' Effects in the Striatum 1399
Summary and Conclusions 1399
Further Reading 1400
Basal Ganglia: Evolution 1401
Basal Ganglia Divisions and Organization in Mammals 1401
Striatum and Pallidum Develop from Distinct Histogenetic Subdivisions of the Subpallium 1401
Dorsolateral versus Ventromedial Parts of the Basal Ganglia: A Gradient from Motor to Cognitive and to Motivational/Emotional F 1401
Cell Types, Neurotransmitter Organization, and Connections 1405
Functional Circuits 1407
Parallel cortico-basal ganglia-thalamocortical loops for control of motor, cognitive-executive, and emotional/motivati 1407
Direct, indirect, and hyperdirect pathways for release and inhibition of movement 1408
Basal ganglia pathways to the brain stem 1408
Modulation of basal ganglia activity 1409
The Basal Ganglia in Nonmammals 1409
Conservative Evolution of the Basal Ganglia in Tetrapods 1409
Developmental evidence supports basal ganglia homology 1409
Comparable cell types, neurotransmitter organization, and connections 1410
Functional circuits: Evidence for conservation and divergence 1412
Divergence and Novelties of the Basal Ganglia in Tetrapods 1414
Expansion of thalamus and cortex/pallium drove the evolution of basal ganglia-thalamocortical pathways 1414
The medial striatum of songbirds and budgerigars: Specialization in song/vocalization learning and plasticity 1414
Limbic versus motor parts of the basal ganglia: Evidence suggests that the limbic part is prevalent in amphibians, reptiles, an 1415
The Basal Ganglia of the First Vertebrates: Evidence from Fish 1416
The pallidum: A novelty of jawed vertebrates 1417
No pallidum, no immigrant interneurons in the striatum? 1417
The case of TH+ cells in the striatum of fish: Do they come from a dLGE-like subdivision? 1418
Further Reading 1419
Basal Ganglia: Functional Models of Normal and Disease States 1421
Functional Anatomy of the Basal Ganglia 1421
General Circuit Overview 1421
Motor Circuit 1421
Direct and Indirect Basal Ganglia Pathways 1421
Pathophysiology of Motor Hypo- and Hyperkinetic Movement Disorders 1423
Hypokinetic Disorders 1423
Hyperkinetic Disorders 1425
Surgical Treatments 1425
Nonmotor Symptoms Related to Basal Ganglia Dysfunction 1425
Conclusion 1426
Further Reading 1426
Basal Ganglia: Habit 1427
Introduction 1427
Definitions of Habit in Cognitive Neuroscience 1427
Definitions of Habits in Psychology 1427
Procedural Learning and Skill Learning 1428
Emotional Habits, Social Habits, and Rituals 1428
Lesion Studies and Attempts to Define a 'Habit Circuit' in the Brain 1428
Computational Framework for Studies of Habit Learning 1429
Addictions as Habits 1429
Chunking of Action Repertoires 1430
Further Reading 1430
Basal Ganglia: Internal Organization 1431
Introduction 1431
Striatum 1432
GPe 1433
STN 1434
SNr and GPi 1435
SNc 1437
Concluding Remarks 1437
Further Reading 1438
Basal Ganglia: Motor Functions 1439
Anatomical Circuits: Skeletomotor and Oculomotor Systems 1439
The Basal Ganglia Act by Varying Tonic Inhibition 1439
Activity of Output Neurons in the Absence of Movement 1439
Basal Ganglia Inhibition Changes During Movement 1440
Basal Ganglia Output Reflects Both Kinematic Variables and Movement Conditions 1441
Basal Ganglia Output and Kinematic Variables 1441
Task-Dependence of Motor-Related Changes in Basal Ganglia Activity 1441
Basal ganglia involvement in internally versus externally guided movements 1442
The basal ganglia and movement sequences 1442
The basal ganglia and automatic movements or habits 1442
The Influence of Dopamine on the Basal Ganglia and Movement 1442
Parkinson's Disease and Movement 1443
Involuntary Movements after Levodopa Treatment 1443
Summary 1444
Further Reading 1444
Basal Ganglia: Physiological Circuits 1445
Composition of the Basal Ganglia 1445
Circuitry of the Basal Ganglia 1445
Striatum: One of the Input Nuclei of the Basal Ganglia 1446
GPe and STN: Two Strongly Interconnected Nuclei of the Basal Ganglia 1448
GPi and SNr: Output Nuclei of the Basal Ganglia 1449
SNc: Modulatory Nucleus of the Basal Ganglia 1449
Functions of the Basal Ganglia 1449
Summary and Conclusions 1450
Further Reading 1451
Bayesian Cortical Models 1453
Introduction 1453
Bayesian Inference 1453
Log Probability Models 1454
Population Coding Models 1455
Hierarchical Models 1457
Conclusion 1459
Further Reading 1460
Bayesian Models of Motor Control 1461
Bayesian Integration 1461
Combining Prior Knowledge with New Evidence 1461
Cue Combination 1462
Bayesian Integration over Time 1463
Bayesian Inference of Structure 1464
Future Directions for Bayesian Inference 1464
Discussion 1465
Further Reading 1466
BDNF in Synaptic Plasticity and Memory 1469
Introduction 1469
Cell Biology of BDNF 1469
Signal Transduction 1469
Activity-Dependent Controls 1471
Transcription 1471
Processing and trafficking 1471
Secretion 1473
Roles of BDNF in Synaptic Plasticity 1473
Input Specificity 1474
Early Phase Long-Term Potentiation 1474
Late Phase Long-Term Potentiation 1475
Long-Term Depression 1475
Learning, Memory, and Other Cognitive Functions 1476
Conclusion 1477
Further Reading 1477
Behavioral Hierarchies 1479
Introduction 1479
Early Neural Models of Behavioral Choice 1479
Evolving Perspectives of Behavioral Choice 1480
Neuronal Bases of Behavioral Hierarchies 1481
Plasticity in Behavioral Hierarchy: Reconfiguration of a Feeding Motor Network 1482
Suppression of a Subordinate by a Dominant Behavior: Network Reconfiguration 1484
Suppression of Turning by Swimming: Recruitment of Essential Elements 1485
Reversing Motor Output: Reconfiguring the Network 1485
Behavioral Switching With Large Differences in Timescale: Network Reconfiguration 1486
No Central Role for Command Neurons in Decision? 1487
Conclusion 1488
Further Reading 1488
Bell's Palsy 1489
Introduction 1489
Background 1489
Clinical 1490
Epidemiology 1491
Pathophysiology 1491
Diagnostic Approach 1493
Treatment 1493
Further Reading 1494
Bergmann Glial Cells 1495
Morphology 1495
Physiology 1495
Membrane Conductance 1495
Gap Junctions 1495
Neurotransmitter Receptors 1496
Glutamate receptors 1496
GABA receptors 1498
Purinoreceptors 1499
Adrenoreceptors 1499
Histamine receptors 1499
Endothelin receptors 1500
Bergmann glial cells in situ express a defined set of neurotransmitter receptors 1500
Neurotransmitter Transporters 1500
Glutamate transporters 1500
GABA transporters 1502
Glycine transporters 1502
Taurine transporters 1503
Responses of Bergmann Glial Cells to Neuronal Activity 1503
Electrical responses 1503
Cytoplasmic calcium responses 1503
Development and Morphogenesis of Cerebellar Structures 1503
Conclusions 1504
Further Reading 1505
Bilingualism 1507
Introduction 1507
Societal Characteristics 1507
Social Status 1507
Compartmentalization 1507
Literacy 1507
Immigrant Generation 1508
Historical Circumstances Other Than Immigration 1508
Individual Considerations 1508
Age of Acquisition 1508
Language Proficiency 1509
Active versus Passive Bilingualism 1509
Linguistic Considerations 1510
Psycholinguistic Perspectives 1510
Brain Localization 1511
Conclusion 1511
Further Reading 1511
Binocular Rivalry 1513
History of Binocular Rivalry 1513
What Instigates Binocular Rivalry 1513
How to Measure Binocular Rivalry 1515
What One Experiences during Binocular Rivalry 1515
Relevance of Binocular Rivalry to Visual Neuroscience 1516
Neural Bases of Binocular Rivalry 1517
Neural Models of Binocular Rivalry 1518
Eye versus Object Rivalry 1519
Binocular Rivalry as a Distributed Process 1520
Further Reading 1521
Biomechanics: Hydroskeletal 1523
Type of Skeletal Systems 1523
Basic Structure of Hydrostatic Skeletons 1523
Fluid-Filled Cavity Skeletons 1523
Muscular Hydrostat Skeletons 1524
Biomechanics of Hydrostatic Skeletons and Comparison to Rigid Skeletons 1525
Constant Volume and Muscle Antagonism 1525
Leverages 1526
Bending 1526
Helical Fibers 1526
Stiffness 1526
Localization of Movement 1527
Mechanical Degrees of Freedom 1527
Variation on a Theme 1528
Peristalsis and Burrowing 1528
Specialized and Generalized Muscular Hydrostats 1528
Motor Control of Hydrostatic Skeletons 1529
The Octopus Arm 1529
Tongue Protrusion in Frogs 1532
Leech Motor Control 1532
The Role of Modeling 1534
Further Reading 1534
Relevant Website 1534
Bipolar Disorder 1535
Epidemiology and Clinical Characteristics 1535
Bipolar Disorders 1535
Epidemiology and Prevalence 1535
Outcome 1535
Neuropsychological Characteristics 1536
Neuroimaging Findings 1536
Neurostructural Findings 1537
Neurofunctional Findings 1538
Neurochemical Findings 1538
Heritability and Genetics of Bipolar Disorder 1539
Family, Twin, and Adoption Studies 1539
Genetic Studies 1539
Treatment 1540
Conclusion 1540
Further Reading 1541
Relevant Websites 1541
Bird Brain: Evolution 1543
The Classical View 1543
The Modern View 1545
Some Anatomical and Molecular Parallels 1545
A Modern View of Telencephalic Evolution 1546
Detailed Views That Need Further Testing 1547
Nuclear-to-Layered Hypotheses 1547
Nuclear-to-Claustrum/Amygdala Hypotheses 1547
Avian Cognition and Brain Function 1548
Conclusion 1549
Further Reading 1549
Relevant Websites 1549
Bird Song Systems: Evolution 1551
Introduction 1551
Vocal Learning Behavior 1551
Vocal Learning Song Systems 1551
Cerebral Auditory Pathway 1553
Evolution of Vocal Learning Pathways 1554
Evolution of the Auditory Pathway 1556
Evolution of Vocal Learning Behavior 1557
Further Reading 1559
Birdsong Learning 1561
Introduction 1561
Basic Functional Anatomy of the Song Pathway 1561
Sequence Generation 1562
The Synaptic Chain Model 1562
The role of intrinsic bursting 1563
Directionality of excitatory connectivity 1564
The role of inhibition 1565
Sequence Learning 1565
Sensorimotor Learning of the Motor Map 1566
Premotor Codes and Representations 1571
Conclusions 1573
Further Reading 1573
Birdsong Learning: Evolutionary, Behavioral, and Hormonal Issues 1575
Birdsong: Definitions and Functions 1575
Birdsong Learning: Behavioral and Comparative Perspectives 1575
The Behavioral Development of Song 1575
The Song-Learning Process 1576
Sensitive Periods for Song Learning; The Effects of Isolation and Deafness; Learning Preferences 1576
Species Variation in Song Learning: Evolutionary Considerations 1577
Hormones and Song Learning and Production 1578
Further Reading 1580
Birdsong: The Neurobiology of Avian Vocal Learning 1581
Song Behavior 1581
The Structure of Song 1581
The Function of Song 1581
Learning/Sensitive Periods 1581
Mechanisms of Singing and Song Learning 1582
Peripheral Mechanisms 1582
Central Mechanisms for Singing 1582
Neural Circuits for Song Learning 1584
Conclusions 1584
Further Reading 1585
Blindsight: Residual Vision 1587
Introduction 1587
Background 1587
Helen the Monkey 1587
D.B., G.Y., and Other Hemianopes 1588
Types of Blindsight and Neural Pathways 1588
Clinical Implications: Visual Restitution Training 1590
Conclusions 1590
Further Reading 1590
Relevant Website 1591
Blood Pressure: Baroreceptors 1593
Introduction 1593
Arterial Baroreceptors 1593
Effector Systems of Arterial Baroreceptor Reflexes 1594
Central Pathways and Processing 1596
Role of Arterial Baroreceptors in Cardiovascular Regulation 1597
Cardiopulmonary Baroreceptors 1598
Further Reading 1598
Blood-Brain Barrier and Neurovascular Mechanisms of Neurodegeneration and Injury 1599
Neurovascular System - Functional Hierarchy 1599
Brain Capillary Unit in Healthy Brain 1599
Blood-Brain Barrier 1599
Basement Membrane 1599
Pericytes 1599
Monocytes and Microglia 1600
Astrocytes 1600
Passive Transport of Molecules in Brain Fluids 1601
Brain Capillary Unit in Disorders of the Aging Nervous System 1601
Parkinson's Disease 1601
Familial Amyotrophic Lateral Sclerosis 1601
Alzheimer's Disease 1601
Blood-Brain Barrier in Disorders of the Nervous System 1602
Multiple Sclerosis 1602
Autoimmune Disease Syndrome Dementia 1602
Parkinson's Disease 1602
Alzheimer's Disease 1603
Transvascular Transport of Abeta 1603
Small and Large Cerebral Arteries in AD 1604
Neurovascular Model(s) of Neurodegeneration 1604
Further Reading 1605
Bone Morphogenetic Protein (BMP) Signaling in the Neuroectoderm 1607
Introduction 1607
Evolutionary Conservation of BMP Inhibition during Neural Induction 1607
Opposing Graded BMP and Hh Signals Pattern the Vertebrate Neuroectoderm 1608
Graded BMP-Mediated Repression of Neural Genes in Drosophila 1610
Neural Patterning in Other Groups of Organisms 1612
DV Inversion in Vertebrates? 1614
Conclusion 1616
Further Reading 1616
Relevant Websites 1616
Borderline Personality Disorder 1617
Introduction 1617
The Neurobiology of Impulsive Aggression in BPD 1617
Neurotransmitter Dysregulations 1617
Serotonin 1617
Other neurotransmitter systems 1618
The Neuroanatomy of Impulsive Aggression 1618
Genetic Contributions 1618
The Neurobiology of Affective Instability in BPD 1619
Neurotransmitter Dysregulations 1619
Cholinergic systems 1619
Other neurotransmitter systems 1619
The Neuroanatomy of Affective Instability 1620
Summary 1620
Further Reading 1620
Botulinum and Tetanus Toxins 1623
Introduction 1623
Clostridial Neurotoxins 1623
CNTs Domain Composition 1623
Mechanisms of Intoxication 1624
Binding 1624
Internalization 1625
Translocation 1625
Proteolysis 1625
Motor Neuronal Intoxication and Regeneration 1627
Pathologies 1627
Pharmacocosmetics Utility 1628
Further Reading 1628
Brain Adrenergic Neurons 1629
Introduction 1629
Neuroanatomical Organization of Adrenergic Neurons 1629
Location and Architecture of PNMT-Containing Neurons 1629
Distribution of PNMT-Containing Afferents 1631
Circuit Organization of the PNMT-Containing Neuronal Cell Groups 1632
Cellular and Molecular Biology of Adrenergic Neurons 1633
Functional Aspects of Adrenergic Neurons 1635
Summary 1635
Further Reading 1636
Brain Asymmetry: Evolution 1637
Behavioral Traits: Language and Handedness 1637
Structural Asymmetries 1637
Petalias and Related Asymmetries 1637
Sylvian Fissure and Related Asymmetries 1638
Central Sulcus and Related Asymmetries 1638
Ventricular Asymmetries 1639
Tissue Component Asymmetries 1639
Determining Factors of Brain Asymmetries 1640
Heredity versus Environment 1640
Fetal Orientation 1641
Hormones 1641
Gender-Specific Asymmetries 1641
Functional Adaptation 1642
Aberrant Asymmetries and Disease 1642
Evolutionary Origins of Anatomical Asymmetries 1643
Brain Size Expansion 1643
Left-Hemispheric Dominance for Language 1644
Left-Hemispheric Dominance for Handedness 1644
Brain Asymmetries in Nonhuman Species 1645
See also 1645
Further Reading 1645
Relevant Websites 1645
Brain Composition: Age-Related Changes 1647
Lipids 1647
Metals and Oxidations 1648
Racemization 1649
Conclusions 1650
Further Reading 1650
Brain Connectivity and Brain Size 1651
Types of Connectivity in the Brain 1651
Brain Size and Number of Neurons 1651
Cerebral Cortex 1651
Basic Connectivity 1651
Functional Implications 1651
Number of Cortical Neurons and Connectedness 1652
Horizontal Connectivity of the Cortex and Brain Size 1654
Fiber Thickness and Conduction Time 1656
Cerebellar Cortex 1656
Cerebellar Connectivity 1656
Functional Implications of Cerebellar Microcircuitry 1656
Scaling of the Cerebellum with Brain Size 1657
Summary of Cerebral and Cerebellar Scaling 1658
Further Reading 1659
Brain Damage: Functional Reorganization 1661
Introduction 1661
Homologous Area Adaptation 1661
Cross-Modal Reassignment 1662
Potentiation of Topographic Representations 1662
Compensatory Masquerade 1663
Discussion 1663
Further Reading 1664
Brain Development: The Generation of Large Brains 1667
What Larger Brains Are Made Of 1667
More Neurons 1667
More Surface 1667
More Glia 1667
Neurons First, Glia Later 1667
How to Add More Neurons 1667
More Progenitors Expand the Cortical Surface 1668
More Neurons per Progenitor Thicken the Cortical Surface 1668
Decreased Cell Death Enlarges the Brain 1668
Natural Mechanisms Are Still Unknown 1668
More Glia Follow 1669
Genetic Regulation of Brain Size 1669
Further Reading 1669
Brain Evolution: Developmental Constraints and Relative Developmental Growth 1671
Introduction 1671
Brain Scaling 1671
Brain versus Body 1671
Brain Component Scaling 1672
The Limbic Factor 1672
The Developmental Structure of the Observed Species Differences 1673
Limbic System Reduction and Amplification 1674
Developmental Constraint, or a Useful Reservoir of Variation for Brain Evolution? 1675
Employment of 'Late Equals Large' to Gracefully Scale the Retina 1675
Using Continuing Neurogenesis to Permit Rapid Memory Acquisition and Loss in the Hippocampus 1677
Why Does the Cortex Get Big and the Spinal Cord and Sensory Thalamus Stay Small? A Network Hypothesis 1678
Further Reading 1679
Relevant Websites 1679
Brain Evolution: The Radiator Theory 1681
Evolutionary Changes in Posture Altered Human Vascular Systems 1681
Emissary Veins Facilitate Selective Brain Cooling in Homo sapiens 1681
Cranial Blood Flow in Early Hominins 1683
The Evolution of Brain Size and Cranial Blood Flow 1683
The Impact of Environment and Behavior on SBC in Hominins 1683
Summary 1685
Further Reading 1686
Brain Fossils: Endocasts 1687
Introduction 1687
Evolutionary Approaches 1687
Paleoneurology, the Direct Evidence 1687
Comparative Neurology, Indirect Evidence 1687
Molecular Neurogenetics 1688
Data Provided by Endocasts 1689
Conclusions 1694
Further Reading 1695
Brain Glucose Metabolism: Age, Alzheimer's Disease, and ApoE Allele Effects 1697
Technical Issues in Brain Glucose Metabolic Imaging in Aging and Degeneration 1697
Molecular and Cellular Factors Involved with Glucose Hypometabolism in the Aging Brain and Alzheimer's Dementia 1698
Brain Glucose Metabolism Changes with Aging 1700
Brain Glucose Metabolic Alterations in AD: Pathophysiology 1701
Brain Glucose Metabolic Alterations: Operating Characteristics in AD and Mild Cognitive Impairment 1702
FDG-PET: Work in Progress 1702
Genetic Factors in Relation with Brain Metabolism Changes in Aging, Mild Cognitive Impairment, and AD 1705
Further Reading 1707
Relevant Websites 1707
Brain Injury: Functional Recovery After 1709
Conceptual Issues 1709
Injury-Induced Reorganization of Cerebral Maps 1710
Therapies for Brain Injury 1711
Neuroprotective Agents 1711
Neural Regeneration 1712
Behavioral Rehabilitation Therapies 1713
Conclusion 1713
Further Reading 1713
Brain Injury: Magnetic Resonance Studies of Metabolic Aspects 1715
Magnetic Resonance 1715
Phosphorus MRS 1715
Proton MRS 1715
Proton MRI 1716
MRS in Brain Injury 1716
Noninjured Brain 1716
Ischemia 1717
Trauma 1718
MRI in Brain Injury 1719
Future Directions 1721
Further Reading 1721
Relevant Website 1721
Brain Modules: Mosaic Evolution 1723
Brains Evolved 1723
Using Extant Species to Study Brain Evolution 1723
Modularity and Brain Evolution 1724
Comparative Evidence for Mosaic Evolution of Brain Structure 1725
Relative Size Change in Major Brain Structures 1725
Correlated Evolution between Components of Functional Systems 1726
Comparative Studies Inform Systems Neuroscience 1726
Correlated Evolution between Brain Structure and Ecology 1727
Neural System Evolution and Brain Size 1728
Conclusions 1728
Further Reading 1728
Brain Na,K-ATPase 1729
Introduction 1729
Na,K-ATPase: Genes, Subunits, and Isoforms 1729
Na,K-ATPase Isoform Distribution in the Central Nervous System 1729
alpha Subunit 1729
beta Subunit 1730
FXYD Proteins 1730
Functional Role of Na,K-ATPase in the Brain 1731
Role in Neurons and Glia 1731
Information from Animals Models 1732
Human Diseases Associated with Genetic Alterations of Na,K-ATPase Genes 1732
Familial Hemiplegic Migraine Type 2 1733
Rapid Onset Dystonia Parkinsonism 1733
Further Reading 1733
Brain Scaling Laws 1735
Introduction 1735
Number of Neurons and Neural Connectivity 1735
Convolutedness and Thickness 1736
Axon Caliber and White Matter 1737
Areas and Area-Area Connectivity 1738
Economical Well-Connectedness 1738
Conclusion 1739
Further Reading 1740
Brain Trauma 1741
Introduction 1741
Assessment and Classification of Traumatic Brain Injury 1741
Glasgow Coma Score 1741
Primary and Secondary Traumatic Brain Injury 1742
Primary Brain Injury 1742
Hemorrhages 1743
Skull fractures 1744
Secondary Brain Injury 1744
Intracranial hypertension 1744
Pathophysiology 1744
Cerebral ischemia 1745
Monitoring 1746
Management of Raised Intracranial Pressure 1746
Physical Positioning 1746
Avoidance of Hypoventilation: CO2 Reactivity 1747
Adequate Sedation and Analgesia; Neuromuscular Paralysis 1747
CSF Drainage by Ventriculostomy 1747
Osmotherapy 1747
Hypertonic Saline Solutions 1748
Intracranial Hypertension Refractory to Standard Treatment: Other Measures to Consider 1748
Barbiturates 1748
Hyperventilation 1748
Decompressive Hemicraniectomy 1748
Management Paradigms 1749
Hypothermia, Neuroprotection, and Restorative Therapies 1749
Further Reading 1750
Brain Volume: Age-Related Changes 1751
Introduction 1751
The Myelin Model of the Human Brain 1751
Functional Implications of the Myelin Model 1754
Brain Development during Childhood to Adolescence 1755
Brain Development Continues during Adulthood until Middle Age 1755
Aging and Myelin Breakdown 1758
Functional Implications of Age-Related Myelin Breakdown 1759
Conclusions 1760
Further Reading 1761
Brain-Computer Interface 1763
Introduction 1763
Definition of a BCI 1763
Brain Signals That Could Be Used in a BCI 1764
Present-Day BCIs 1765
Signal Processing 1767
Potential Users 1769
Applications 1770
Nature and Needs of BCI Research and Development 1770
Further Reading 1771
Relevant Websites 1771
Brains of Primitive Chordates 1773
Introduction 1773
Phylogenetic Relationships 1773
Comparative Appearance of Brains, Spinal Cords, and Nerves 1773
Primitive Craniates (Cyclostomes) 1773
Cephalochordates 1776
Urochordates 1779
Hemichordates 1779
Molecular Patterning of the Neuraxis during Development 1780
Neural Crest, Placodes, and Their Derivatives 1781
Further Reading 1782
Brainstem and Cranial Nerves 1783
Introduction 1783
Efferent System of the Spinal Cord 1783
Function, Position, and Form 1783
Genetic Profile 1784
Efferent System of the Brain Stem 1785
Dorsomedial Column 1785
Movement of the tongue: The hypoglossal nucleus (12th nucleus) 1785
Coordinated movements of the eyeball (6th, 4th, and 3rd nuclei) 1785
Genetic profile 1786
Ventrolateral (Branchiomotor) Column 1786
Control of head movements: The accessory (11th) nucleus 1786
Deglution and phonation: The nucleus ambiguus (9th and 10th nuclei) 1786
Control of jaw movements: The nonmammalian (accessory) facial (7th) and trigeminal (5th) nuclei 1787
Control of mastication and facial expression: The mammalian (main) trigeminal (5th) and facial (7th) nuclei 1787
Satellite neurons to the facial-trigeminal nuclear complex 1787
Vegetative parasympathetic column 1787
Genetic Profile 1788
Afferent System of the Brain Stem 1788
Further Reading 1789
Brainstem Control of Eye Movements 1791
Saccadic Eye Movements and Fixation 1791
Organization of Brain Stem Circuits Involved in Saccades 1791
The Neural Comparator 1792
Saccadic Burst Generator 1793
The Neural Integrator 1794
The Resettable NI 1794
Smooth Pursuit Eye Movements 1794
Target Motion Inputs and the Formation of Retinal Slip Signals 1794
The Pursuit Generator 1795
Brain Stem Elements in the Pursuit System 1795
Saccade/Pursuit Neurons 1795
Further Reading 1796
Brainstem Respiratory Circuits 1797
Introduction 1797
Volition 1797
Emotion 1797
Regulation 1797
One, Perhaps Two, Oscillators for Generation of Respiratory Rhythm 1798
Cellular and Network Bases for Generation of Respiratory Rhythm 1802
Cellular and Network Basis of Burst Pattern Formation 1804
Summary 1804
Further Reading 1804
Broca's Area: Evolution 1805
Morphology and Cytoarchitectonics 1805
Lateralization of Broca's Area 1806
Potential Evolutionary and Functional Correlates of Broca's Area in Primates 1808
Conclusions 1808
Further Reading 1809
Brodmann's Areas 1811
Further Reading 1813
C 1815
CADASIL (Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy) 1815
Introduction 1815
CADASIL 1815
The Notch 3 Receptor 1815
Structure of Notch 3 1815
Functional Role of Notch 3 in the Vessel 1816
The Notch 3 Signaling Pathway 1817
CADASIL: A Disordered Notch 3 Signaling Pathway? 1817
Mutation Spectrum 1817
Accumulation of Aggregated Notch 3ECD Protein 1819
Impact of CADASIL Mutations on Notch 3 Receptor Activity 1819
Conclusion and Future Prospects 1819
Further Reading 1820
Cadherins and Synapse Organization 1823
Introduction 1823
Classical Cadherins 1823
Seven-Pass (Flamingo-like) Transmembrane Cadherins 1828
Protocadherins 1829
Fat-Related and Other Members of Cadherin Superfamily 1829
Conclusion 1830
Further Reading 1830
Cajal's Place in the History of Neuroscience 1831
Introduction 1831
Summary of the Scientific Career of Cajal 1831
Cajal and the Golgi Method: The Neuron Doctrine and the Commencement of a New Era in Neuroscience 1834
Cajal and the Neuron Doctrine 1837
Law of Dynamic Polarization of Nerve Cells 1838
Further Reading 1841
Relevant Website 1841
Calcitonin Gene-Related Peptide (CGRP) and Receptors 1843
Introduction 1843
Discovery of CGRP 1843
Neuroanatomical Localization 1844
CGRP mRNA-Containing Neurons 1844
CGRP-IR Neurons and Axons 1845
CGRP Receptor Binding Sites 1845
Recent Progress in CGRP Receptor Research 1849
Biological Activities 1850
CGRP and Olfaction 1850
CGRP and Audition 1850
CGRP and Vision 1851
CGRP and Taste/Feeding 1851
CGRP and Learning Behavior 1851
CGRP and Autonomic Functions 1851
CGRP and Motor Neurons, Development and Functions 1852
CGRP and Sensory Neurons 1852
CGRP Effects on Inflammation 1853
CGRPalpha Knockout Mice 1853
Conclusion and Perspectives 1854
Further Reading 1854
Calcium and Signal Transduction 1855
Calcium Regulation 1855
Plasma Membrane Regulation of Ca2+ Levels 1855
Plasma membrane Ca2+ pump and exchanger 1855
Plasma membrane Ca2+ channels 1855
The ER 1857
Mitochondria and Ca2+ Regulation 1857
Ca2+ Signal Transduction 1857
Ca2+ and Transcription Regulation 1857
Ca2+-Mediated Regulation of Protein Phosphorylation and Dephosphorylation 1858
Ca2+-Dependent Protein Degradation 1858
Ca2+ Regulation and Signal Transduction in Aged Brains 1859
Functional Consequences of Age-Related Changes in Ca2+ Signaling 1859
Conclusions 1860
Further Reading 1860
Calcium Channel and Calcium-Activated Potassium Channel Coupling 1861
Regulating Membrane Excitability by Activation of Ca2+-Activated Potassium Channels 1861
Pharmacological Determination of Ca2+ Channel Subtypes Underlying Activation of Ca2+-Dependent Hyperpolarizations i 1862
Identity of the Ca2+ Channel Subtype Activating Apamin-Sensitive AHPs 1862
Coupling of Ca2+ Channel Subtypes to Activation of Apamin-Sensitive AHPs 1862
CaV1.2 and -1.3 L-type Ca2+ channels 1862
CaV2.2 N-type Ca2+ channels 1862
CaV3 T-type Ca2+ channels 1862
CaV2.1 P/Q-type Ca2+ channels 1862
Identity of the Ca2+ Channel Subtypes Activating Apamin-Insensitive AHPs 1863
Coupling of Ca2+ Channel Subtypes to Activation of Apamin-Insensitive AHPs 1863
CaV1.2 and -1.3 L-type Ca2+ channels 1863
CaV2.2 N- and CaV2.1 P/Q-type Ca2+ channels 1863
Pharmacological Determination of Ca2+ Channel Subtypes Underlying Activation of BK (KCa1.1) Channels in Central Neurons 1864
CaV2.2 N-type Ca2+ Channels 1864
CaV1.2/1.3 L- and CaV2.2 N-type Ca2+ Channels 1864
CaV2.1 P/Q-type Ca2+ Channels 1864
Direct Measurements of Channel Association in Brain 1865
Ca2+ Channels and SK (KCa2) Channels 1865
Ca2+ Channels and BK (KCa1.1) Channels 1865
CaV2.2 N-type Ca2+ channels and BK channels 1865
CaV1.2 and -1.3 L-type Ca2+ channels and BK channels 1865
CaV2.1 P/Q-type Ca2+ channels and BK channels 1865
Conclusion 1866
Further Reading 1866
Calcium Channel Subtypes Involved in Neurotransmitter Release 1869
Ca2+ Channels in Excitation-Response Coupling 1869
Steps in Coupling Excitation to Neurotransmitter Release 1869
Discovery of Multiple Ca2+ Channel Types 1870
In General, Multiple Types of Ca2+ Channels Contribute to Central Nervous System Neurotransmission 1872
Intimate Relationship between Ca2+ Entry and Neurotransmitter Release 1872
Only Ca2+ Channels Close to the Release Machinery Matter 1872
Transmitter Release is Triggered by Ca2+ Entry, whereas Depolarization per se Exerts No Direct Effect 1872
The Ca2+ Sensor for Rapid Vesicle Release Is Synaptotagmin 1872
Transmitter Release is Related to Ca2+ Entry by a Steep Power-Law Function 1872
Multiple Ca2+ Channels (and Channel Types) Provide Input to a Common Ca2+ Sensor 1873
Exceptions to Generalizations about Multiple Ca2+ Channel Types 1874
Not always Multiple Channel Types 1874
Not always CaV2 Channels 1874
Not always the Same Type of Ca2+ Channel throughout Development 1875
What Are Multiple Ca2+ Channels Good for? 1875
Further Reading 1875
Calcium Channels 1877
Introduction 1877
Calcium Currents in Excitable Cells 1877
Calcium Channel Subunits 1877
Calcium Channel Genes 1877
Calcium Channel Structure and Function 1879
Three-Dimensional Structure of Calcium Channels 1879
Physiological Roles of Calcium Channels 1879
Calcium Channel Signaling Complexes 1881
Calcium Channel Molecular Pharmacology 1881
Calcium Channelopathies 1883
Further Reading 1883
Calcium Channels and SNARE Proteins 1885
Introduction 1885
The SNARE Protein Interaction Site on Presynaptic Cav2 Channels 1885
The Synprint Site Is Important for Efficient Release of Neurotransmitter 1887
Regulation of Presynaptic Ca2+ Channels by SNARE Proteins 1889
Modulation of the SNARE-Synprint Interaction 1890
Conclusion 1890
Further Reading 1891
Calcium Homeostasis in Glia 1893
Introduction 1893
Sources of Calcium in Glial Cells 1893
Intracellular Calcium Release 1893
Capacitative Calcium Entry 1894
VGCCs 1894
Transient Receptor Potential Channels 1895
Mitochondria 1895
Ligand-Evoked Calcium Signaling in Glial Cells 1895
Patterns of Calcium Signaling in Individual Cells 1896
Intercellular Calcium Waves 1896
Potential Functions of Glial Intercellular Ca2+ Waves 1897
Release of Signaling Molecules by Glial Calcium Signaling 1898
Calcium Signaling in Astrocyte-Neuron Interaction 1898
Calcium Signaling in Astrocyte-Vascular Interaction 1898
Calcium Signaling in Cortical Spreading Depression and Migraine 1899
Summary 1899
Further Reading 1899
Calcium Waves in Glia 1901
Introduction 1901
Ca2+ Waves Can Be Elicited in Astrocyte Populations by Several Types of Stimuli 1901
Mechanism of Propagation: Involvement of Purinergic Signaling 1901
Mechanism of Propagation: Involvement of Gap Junctions 1901
Interaction between Purinergic Signaling and Gap Junctions 1902
Nitric Oxide Signaling Can Mediate Ca2+ Waves 1903
Intracellular Mechanisms Controlling the Wave 1903
Ca2+ Waves in Intact Tissue 1903
Control of the Wave by Receptors 1904
Disease 1906
Interaction with Other Cells 1906
Ca2+ Waves during Development 1906
Modeling Astrocyte Ca2+ Waves 1907
Further Reading 1907
Calcium Waves: Purinergic Regulation 1909
Introduction 1909
Current Models for the Propagation of Astrocytic Ca2+ Waves 1909
Mechanisms of Purinergic Release: Exocytosis versus Connexin Hemichannels 1909
The P2X7 Pore-Forming Receptor and mCa2+ Signaling 1910
Purinergic Signaling and Ca2+ Waves in Neuronal Physiology 1911
Involvement of Adenosine as Purinergic Mediator of Astrocytic Ca2+ Signaling 1912
Conclusions 1912
Further Reading 1913
Calcium-Calmodulin Kinase II (CaMKII) in Learning and Memory 1915
Introduction 1915
General Characteristics of Calcium/CaM-Kinases 1915
Multifunctional CaM-Kinases 1915
CaM-Kinase Kinase 1915
CaM-Kinase I 1916
CaM-Kinase IV 1918
CaM-Kinase II 1919
Substrate-Specific CaM-Kinases 1920
CaM-Kinase III 1920
Myosin Light-Chain Kinase 1920
Summary 1921
Further Reading 1921
Relevant Websites 1922
Canal-Otolith Interactions 1923
Introduction 1923
Background Definitions 1923
Canal Influences on Tilt Responses 1924
Canal Influences on Translation Responses 1927
Otolith Influences on Rotation Responses 1928
Summary 1930
Further Reading 1931
Cardiovascular Function: Central Nervous System Control 1933
Introduction 1933
Autonomic Control of the Cardiovascular System 1933
Sympathetic Vasomotor Tone Is Tonic and Driven from Supraspinal Sites 1935
Neural Control of the Heart Is a Balance between Sympathetic and Parasympathetic Influences 1935
Cardiovascular Homeostasis Results Primarily from a Negative Feedback Reflex 1936
Other Reflexes Influence Cardiovascular Homeostasis 1936
A Set Point for Arterial Pressure 1937
The Nervous System and the Long-Term Control of the Cardiovascular System 1937
Hypertension and the Central Neural Control of Cardiovascular Function 1938
Further Reading 1938
Cataplexy 1939
Clinical Features of Cataplexy 1939
Physiological and Pathophysiological Aspects of Cataplexy 1941
Cataplexy and Hypocretin/Orexin Deficiency 1942
Further Reading 1945
Relevant Website 1945
CCK/Gastrin and Receptors 1947
Discovery of Cholecystokinin 1947
Distribution of CCK 1947
CCK Biosynthesis 1947
CCK Receptor Discovery and Distribution 1947
CCK Receptor Structure and Function 1948
Intracellular Mediators of CCK Receptor Activation 1949
Biological Activity of CCK 1949
Further Reading 1949
Cell Adhesion Molecules at Synapses 1951
Introduction 1951
Classical Cadherins 1951
Protocadherins 1953
NCAM 1954
L1-Family CAMs 1954
Other Synaptic Ig Superfamily Members 1955
Neurexins and Neuroligins 1956
ECM-Mediated Interactions 1957
Concluding Remarks 1958
Further Reading 1958
Cell Culture: Autonomic and Enteric Neurons 1959
Introduction 1959
Neural Crest Cells 1959
Sympathetic Neurons 1960
Parasympathetic Neurons 1961
Cardiac Ganglia 1964
Tracheal Ganglia 1964
Chick Ciliary Ganglion Neurons 1964
Enteric Neurons 1964
Conclusions 1965
Further Reading 1965
Cell Culture: Primary Neural Cells 1967
Introduction 1967
Primary Cultures versus Cell Lines 1967
Different Types of Primary Neural Cell Culture 1968
Neurons 1968
Brief Protocol: Cortical Neurons 1969
Astrocytes 1969
Brief Protocol: Cortical Astrocytes 1969
Microglia 1969
Brief Protocol: Microglia 1969
Oligodendrocytes 1970
Brief Protocol 1: Forebrain Oligodendrocytes 1970
Brief Protocol 2: Immunopanning 1970
Brain Endothelium 1970
Brief Protocol: Brain Endothelium 1971
Further Reading 1971
Cell Replacement Therapy for Huntington's Disease 1973
Why Neuronal Regeneration Therapeutic Strategies for Huntington's Disease? 1973
Cell Transfer and Stem Cell Approaches for HD 1973
Immunology and Inflammation Issues Specific to Neural Intracerebral Cell Transfer 1973
Deriving and Examining Stem Cells for Functional Experimental Repair in HD Transgenic Models 1974
Clinical Exploratory Trials of Transplanting Fetal Striatal Cell and Neurons to Patients with HD 1975
Further Reading 1975
Relevant Website 1976
Cell Replacement Therapy: Mechanisms of Functional Recovery 1977
Functional Recovery 1977
Mechanisms of Functional Recovery 1977
Nonspecific Mechanisms 1977
Pharmacological Mechanisms 1978
Trophic Mechanisms 1978
Glial Support 1979
Pathway Repair 1979
Neuronal Reinnervation 1979
Circuit Reconstruction 1980
Full Network Repair 1980
Matching Donor Cells, Mechanisms, and Applications 1980
Further Reading 1981
Cell Replacement Therapy: Parkinson's Disease 1983
Introduction 1983
History 1983
Studies in Rodents and Primates 1983
Clinical Trials 1984
Future Cell Replacement Strategies 1986
Further Reading 1987
Cell-Cell Communication Through the Extracellular Space 1989
Introduction 1989
Communication Processes in the Brain: WT versus VT 1989
WT and VT in the Cellular Networks 1989
Characteristics of the channel allow VT to be distinguished from WT 1989
Main features of VT and WT 1989
Functional implications of VT and WT for brain integrative functions 1990
The Concept of RRIs and Receptor Mosaics 1991
Emergence of the Concept of RRIs and RMs 1991
Cross-talk between receptors: The classical view 1991
RRIs: A new integrative mechanism at the membrane level 1991
Implications of the Concept of RRIs and RMs 1992
Biochemical implications 1992
RRIs between synaptic and extrasynaptic receptors integrate WT and VT signals 1993
RRIs: Relevance for Molecular Neuropsychopharmacology 1993
Pathological Implications and Novel Treatments of Parkinson's Disease, Schizophrenia, and Depression 1994
Development of A2A receptor antagonists in the treatment of Parkinson's disease based on the A2A/D2 receptor interaction in the 1994
Development of mGluR5 antagonists for treatment of Parkinson's disease based on multiple mGluR5/A2A/D2 receptor interactions i 1994
Development of agonists with combined A2A agonist/mGluR5 agonist properties for the treatment of schizophrenia based on multip 1994
Development of galanin receptor antagonists for treatment of depressive illness based on galR/5-HT1A receptor interactions 1994
WT and VT in the Molecular Networks: Horizontal versus Vertical Molecular Networks 1995
The Extracellular and Intracellular Molecular Networks: A GMN Enmeshes the Entire CNS 1995
Structure and Function of the Extracellular Part of the GMN 1995
A New Model of Brain Networks: Partially Overlapping Cellular and GMNs with a Nested Organization 1996
Pathological and Therapeutic Implications of the Current View 1997
Further Reading 1998
Cells: 5-Hydroxytryptamine Receptors 1999
Introduction: Background and Scope 1999
Sympathetic Neuron 5-HT Receptors 2000
Preganglionic 2000
Postganglionic 2001
Parasympathetic Neuron 5-HT Receptors 2001
Preganglionic 2001
Postganglionic 2002
ENS Neuron 5-HT Receptors 2003
ANS Sensory Afferent Neuron 5-HT Receptors 2004
5-HT Receptors on CNS Neurons Regulating the ANS 2005
Autonomic Neuroeffector Cell 5-HT Receptors 2006
Conclusion 2007
Further Reading 2007
Relevant Website 2008
Cellular Dynamics Revealed by Digital Holographic Microscopy 2009
Introduction 2009
Digital Holographic Microscopy 2010
Holography Principle 2010
DHM Setup 2011
Cellular Imaging 2012
Real-Time Visualization of Cellular Dynamics 2013
Nanoscale Cellular Fluctuations 2015
Conclusion 2016
Further Reading 2017
Central Gustatory System and Ingestive Behavior 2019
Introduction 2019
Peripheral Taste Nerves 2019
Central Taste Pathways 2019
Functional Contributions of Taste to Ingestive Behavior 2021
Neural Coding of Taste Quality 2021
Hindbrain versus Forebrain Taste Function 2022
Taste and Sodium Appetite 2022
Conclusion 2023
Further Reading 2023
Central Pattern Generators 2025
Introduction 2025
Cellular and Network Mechanisms of Rhythm Generation 2025
Synaptic Properties 2025
Intrinsic Neuronal Properties 2026
Pacemaker and Network-Based Mechanisms 2027
Activation and Neuromodulation of CPGs 2028
Complement and Source of Neuromodulators 2028
Divergence and Convergence of Neuromodulator Action 2029
Descending Commands and the Activation of Specific Patterns 2029
Coordination of CPGs 2031
Modular Organization of Rhythmic Motor Behaviors 2031
Coordination through Central Coupling or Sensory Feedback 2031
Flexibility of Motor Pattern Coordination 2033
Multifunctional Neurons and Circuits 2033
CPGs as Test Beds for General Principles of Circuit Function and Dynamics 2034
Further Reading 2034
Central Pattern Generators: Sensory Feedback 2035
Introduction 2035
What Is Sensory Feedback? 2035
Why CPGs Are Subject to Sensory Feedback 2035
Unpredictable development 2035
Unpredictable environment 2036
Compensation for morphological alterations 2036
Components of Motor Systems 2036
Experimental Approaches: Techniques and Animal Preparations 2036
Experimental Approaches and Techniques 2037
Comparison of CPG output and movements of intact animals 2037
Sensory entrainment 2037
Animal Preparations 2037
Locust flight 2038
Leech swimming 2039
Lamprey swimming 2040
Crustacean swimmeret beating 2041
Insect and crayfish walking 2041
Conclusion: Beyond Sensory Modulation 2043
Further Reading 2043
Cerebellar Deep Nuclei 2045
Lesion Studies: What Do the Multiple Maps in the Cerebellum Control? 2045
Parallel Fibers and Purkinje Cell Beams Link Deep Nuclear Cells as a Mechanism of Coordination 2047
What Does the Cerebellum Contribute to Cognitive Processes? 2048
Further Reading 2049
Cerebellar Lesions and Effects on Posture, Locomotion and Limb Movement 2051
Cerebellar Motor Disorders 2051
Limb Control 2051
Balance and Posture 2052
Gait 2053
Motor Learning 2054
A Common Mechanism? 2054
Summary 2055
Further Reading 2056
Cerebellar Microcircuitry 2057
Neuronal Elements Constituting Cerebellar Microcircuits 2057
Mossy Fiber Afferents 2057
Granule Cells 2057
Purkinje Cells 2057
Basket Cells 2057
Stellate Cells 2057
Golgi Cells 2057
Lugaro Cells 2057
Unipolar Brush Cells 2058
Climbing Fibers 2058
Third Type of Afferent 2058
Cerebellar Nuclear Neurons 2058
Parvicellular Red Nucleus Neurons 2058
Local Microcircuit Mechanisms 2058
Two-Stepped Divergence and Convergence 2059
Synaptic Plasticity 2059
Feed-Forward Inhibition 2059
Feedback Inhibition 2059
Reciprocal Inhibition 2059
Noise Generator 2060
Modular Structure: Microzone and Microcomplex 2060
Incorporation of Microcomplex into Segmental Circuits 2060
Incorporation of Microcomplex in Cerebral Cortical Circuits: Internal Model for Voluntary Movements 2061
Incorporation of Microcomplex in Cerebral Cortical Circuits: Internal Model for Mental Functions 2061
Conclusion 2062
Further Reading 2062
Cerebellum and Oculomotor Control 2063
Introduction 2063
Anatomical Approach to the Cerebellum and Ocular Motor Control 2063
Vestibulocerebellum: The Flocculus/Paraflocculus 2063
Pursuit 2063
Gaze holding 2063
Spontaneous nystagmus 2063
Postsaccadic drift 2065
Vestibular-ocular reflexes 2065
Vestibulocerebellum: The Nodulus/Ventral Uvula 2066
Functional Differences between the Flocculus/Paraflocculus and the Nodulus/Uvula 2066
Dorsal Cerebellar Vermis and the Posterior Fastigial Nucleus 2067
Saccades 2067
Pursuit 2067
Other Abnormalities of Ocular Motor Control Associated with Cerebellar Dysfunction 2068
Abnormalities of eye torsion 2068
The Cerebellum and Binocular Ocular Motor Control 2068
Disorders of alignment with cerebellar lesions 2068
Ocular Motor Learning and the Cerebellum 2069
Further Reading 2069
Cerebellum: Clinical Pathology 2071
Introduction 2071
Motor Symptoms 2071
Muscle Tone 2071
Gordon Holmes sign 2071
Pendulousness 2071
Postural asymmetries 2072
Pendular tendon reflexes 2072
Impairment of Motor Coordination 2072
Heel-knee-shin/toe square-drawing tests 2072
Finger-nose-finger test 2072
Rebound 2072
Finger-to-finger and finger-to-thumb tests 2073
Rapid, alternating movements 2073
Tremor 2073
Intention or kinetic tremor 2073
Postural tremor 2073
Palatal tremor 2073
Oculomotor Disturbances 2073
Equilibrium and Stance 2073
Gait 2074
Speech 2074
Dysarthria 2074
Cerebellar mutism 2074
Agrammatism 2074
Verbal fluency 2074
Cognition and Emotion 2074
Cerebellar Role in Motor Learning 2075
Localization: Body Maps and Motor Modes 2075
Sensorimotor Maps 2075
Localization of Cognitive Functions 2075
Further Reading 2075
Cerebellum: Evolution and Comparative Anatomy 2077
Introduction 2077
Histology of the Mammalian Cerebellar Cortex 2077
Cerebellar Cortex in Vertebrates 2079
Gross Anatomy of the Vertebrate Cerebellum 2079
Longitudinal Modular Organization of the Cerebellar Cortex and Its Efferent Connections 2085
Development of the Cerebellum 2086
Motor Control and Motor Learning: The Link between Structure and Function 2088
Further Reading 2089
Cerebellum: Models 2091
Cerebellar Learning Models 2091
Computational Models of Cerebellar LTD 2092
Rhythmic versus Chaotic Firing of Inferior Olive Neurons 2095
Feedback Error Learning Model 2096
The Ventral Paraflocculus and Ocular Following Responses 2099
Toward a General Model of the Cerebellum 2100
Further Reading 2101
Cerebral Cortex 2103
Further Reading 2106
Cerebral Cortex: Inhibitory Cells 2109
Introduction 2109
Two Basic Neuron Types in Cortex 2109
Morphological Diversity of Cortical GABA Cells 2109
Expression Patterns of Specific Chemical Substances 2110
Firing Pattern Diversity 2111
Nonpyramidal Cell Subtypes Identified by a Combination of Anatomical, Physiological, and Chemical Characteristics 2112
FS/Parvalbumin Cell Group 2113
LS Neurogliaform Cell Group 2113
Somatostatin Cell Group 2114
VIP/CCK/Calretinin Cell Group 2114
Double-bouquet cells 2114
Horizontal/descending arbor cells 2114
Small basket cells 2114
Descending basket cells 2114
Arcade cells 2114
CCK large basket cells 2114
Comparison of FS Basket Cells with Other Classes 2114
Comparison with Hippocampal GABAergic Cells 2115
Developmental Differentiation of GABAergic Cells 2116
Neuron Types and Circuit Organization in the Cortex 2116
Further Reading 2116
Cerebral Cortex: Symmetric vs. Asymmetric Cell Division 2119
Introduction 2119
Cell-Type Specification in the Neocortex 2120
Temporal Determinants: Birthdate and Laminar Fate 2120
Asymmetric and Symmetric Division of Cortical Progenitors Function in the Generation of Cortical Cell Diversity 2121
Does the Segregation of Progenitors to the Ventricular Zone and Subventricular Zone Represent a Bifurcation of Cell Fates? 2122
Intrinsic Factors of Cortical Cell-Fate Specification 2123
A Cascade of Intrinsic Determinants Controls the Production of Neurons in Drosophila 2124
Further Reading 2124
Cerebral Fissure Patterns 2127
Introduction 2127
Changing Patterns of Fissures with Cortical Development and Evolution 2127
Fissure Patterns and Brain Size 2128
Names of Fissures and Possible Homologies 2129
Experimental Manipulation of Fissure Formation 2130
Mechanical Theories of Fissure Formation 2130
Functional-Mechanical Theories of Fissure Formation 2131
Fissure Patterns in the Cortex of Extinct Mammals 2133
Further Reading 2134
Cerebrovascular Disease 2135
Occlusive Diseases and Stroke 2135
Intracranial Vascular Diseases 2136
Intracranial Aneurysms 2136
Ruptured aneurysms 2136
Unruptured aneurysms 2136
Vascular Malformations 2137
Arteriovenous malformations 2137
Dural arteriovenous malformations 2138
Cavernous malformations 2138
Developmental venous anomalies 2138
Capillary telangiectasias 2138
Spinal Vascular Diseases 2139
Arteriovenous Malformations of the Spinal Cord 2139
Dural arteriovenous fistulas 2139
Glomus type 2139
Juvenile type 2139
Perimedullary 2139
Traumatic Vascular Diseases 2139
Traumatic Aneurysms 2139
Carotid-Cavernous Fistulas 2139
Spontaneous Intracerebral Hemorrhage 2139
Further Reading 2140
Cetacean Brains 2141
Introduction 2141
Gross Structure of the Cetacean Brain 2141
Brain Size 2141
Surface Features 2142
Reproportioning of Central Sensory Structures 2142
Auditory Structures 2142
Olfactory Structures 2143
Hemispheric Connectivity 2143
Cortical Cytoarchitecture 2143
Conclusions 2144
Further Reading 2144
Chemical Senses: Overview 2145
Chemical Senses: Protozoa 2147
Introduction 2147
Paramecium Chemosensory Behavior 2147
Physiological Basis of Chemosensory Behavior 2147
Paramecium Membrane Receptors 2149
Ciliary Motion 2149
Other Ca2+-Dependent Processes in Paramecium Chemical Sensing 2149
Tetrahymena 2149
Euplotes 2150
Dictyostelium 2150
Further Reading 2152
Chemoaffinity Hypothesis: Development of Topographic Axonal Projections 2153
Introduction 2153
The Chemoaffinity Hypothesis 2153
Discovery of Graded Molecular Guidance Cues 2154
Mechanisms of Map Development 2154
Multiple Phases in the Development of a Topographic Map 2154
AP Mapping 2156
DV Mapping 2156
Refinement of the Retinotopic Map 2158
Concluding Statements 2158
Further Reading 2158
Cholinergic Neurotransmission in the Autonomic and Somatic Motor Nervous System 2161
Introduction 2161
Synthesis of Acetylcholine 2161
Choline and Choline Transport 2161
Choline Acetyltransferase 2162
Storage of Acetylcholine 2163
Release of Acetylcholine 2163
Regulation of Acetylcholine Neurotransmission 2163
Inactivation of Acetylcholine 2164
Enzymatic Hydrolysis: AChE 2164
Cholinergic Receptors 2164
nAChRs 2164
Muscarinic Acetylcholine Receptors 2168
Physiological Responses Produced Following Increases in Cholinergic Neurotransmission 2168
Further Reading 2168
Cholinergic Pathways in CNS 2169
Acetylcholine as a Central Nervous System Transmitter 2169
CNS Cholinergic Synapses 2169
Main CNS Cholinergic Pathways 2170
The Functions and Neurobiology of Basal Forebrain Cholinergic Neurons 2173
Trophic Factor Dependency of Forebrain Cholinergic Neurons 2174
CNS Cholinergic Neurons and AD 2175
Further Reading 2176
Cholinergic System 2179
Introduction 2179
Anatomy of the Cholinergic Basal Forebrain 2179
Anatomy of the Thalamic and Brain Stem Cholinergic Subgroups 2181
CBF Neuron Survival 2182
CBF Neurons Express NGF Receptors 2182
NGF Signaling in CBF Neurons 2183
CBF Alterations during the Progression of AD 2185
Mechanisms of NGF Receptor Alterations in Cholinergic Neurons in MCI and AD 2185
TrkA Signaling in the Cholinotrophic System 2185
p75NTR Signaling in the Cholinotrophic System 2186
CBF Neurons Display Cell Cycle Proteins in MCI and AD 2186
ProNGF and Cholinergic NB Neuron Survival 2186
CBF Neurons: Sorting Life from Death 2188
Genetic Signature of CBF Neurons 2188
Therapeutics for Cholinergic NB Dysfunction in AD 2189
Further Reading 2190
Cholinergic System Imaging in the Healthy Aging Process and Alzheimer Disease 2191
Introduction 2191
The Cholinergic System 2191
Anatomy of the Cholinergic System 2191
Cholinergic Neurotransmission 2192
Targeting the Cholinergic System In Vivo 2195
Pet Imaging of Cholinergic Receptor Binding and ChE Activity 2195
How can PET measure neuroreceptor binding and density in vivo? 2195
Cholinergic Markers in PET 2196
Perspective of neuroreceptor imaging in Alzheimer's disease 2198
Functional Imaging of Cholinergic Treatment Effects 2199
MRI Studies to Detect Atrophy of Cholinergic Nuclei 2199
Imaging the Cholinergic System In Vivo: Future Perspectives 2200
Further Reading 2202
Chromaffin Cells: Model Cells for Neuronal Cell Biology 2203
Techniques for Studying Chromaffin Cells 2203
Synthesis and Storage of Catecholamines in Adrenal Chromaffin Cells and Chromaffin Granules 2203
Control of Catecholamine Biosynthesis 2205
Control of Catecholamine Secretion 2207
Neuronal 2207
Nicotinic Cholinergic Receptors on Chromaffin Cells 2207
Peptide Modulation of Secretion 2207
Nonneuronal 2208
Exocytosis and Endocytosis 2209
Ca2+ Signaling 2210
Clinical Uses of Chromaffin Cells in Parkinson's Disease and Chronic Pain 2210
Further Reading 2211
Chronic (Repeated) Stress: Consequences, Adaptations 2213
Chronic Stress 2213
Chronic Stress and Recruitment of a Limbic Network That Biases Subsequent Autonomic, Behavioral, and Neuroendocrine Responses t 2213
Habituation of HPA Responses with Time after Inescapable Stressors 2213
Repeated Restraint 2214
Why Habituation? 2214
Where in the Brain Does Habituation to Restraint Occur? 2214
How Does Habituation Occur? 2214
Facilitation to Novel Stimuli Occurs with Chronic Stress 2215
What Does Facilitation Look Like? 2215
Facilitated Responses Require Sustained or Intermittently Repeated Stressors and Elevated Corticosterone Concentrations 2216
How Does Facilitation Occur? 2216
The Up- and Downsides of HPA Responses to Chronic or Repeated Challenge 2217
The Upside 2217
The Downside 2218
Further Reading 2219
Cingulate Cortex 2221
Anatomy of Cingulate Cortex 2221
Subdivisions 2221
Connections 2221
Role of Cingulate Cortex in Behavior 2222
Early Ideas of Cingulate Function 2222
Role of Cingulate Cortex in Reward-Guided Behavior 2223
Role of Cingulate Cortex in Selecting Action 2223
Role of Cingulate Cortex in Monitoring Behavioral Outcomes 2224
Role of Cingulate Cortex in Assigning Motivational Significance to Potential Actions 2224
Conclusion 2226
Further Reading 2226
Circadian Function and Therapeutic Potential of Melatonin in Humans 2227
The Circadian Function and Therapeutic Potential of Melatonin in Humans 2227
Melatonin and 6-Sulfatoxymelatonin 2227
Melatonin Gas Chromatographic-Mass Spectrometric Assay and Radioimmunoassays 2227
Bright (High-Intensity) Light 2227
Melatonin Suppression Test 2227
Seasonal Affective Disorder, or Winter Depression 2228
Phase Shift Hypothesis 2228
Dim Light Melatonin Onset as a Marker for the Phase of the Endogenous Circadian Pacemaker 2228
Dim Light Melatonin Offset and Melatonin Synthesis Offset 2228
Phase Angle Difference, Circadian Misalignment, and Phase Typing 2229
Zeitgeber Time 2229
Phase Angle of Entrainment and Circadian Period 2229
Circadian Time 2230
The Light and Melatonin Phase Response Curves 2230
Blind Free-Runners 2231
Relative Coordination to Weak Zeitgebers, the Two-Point Tau, the Tau Response Curve, and Tau at Entrainment Phase 2232
Natural Entrainment 2233
The Function of Endogenous Melatonin in Humans 2233
Further Reading 2234
Relevant Websites 2234
Circadian Gene Expression in the Suprachiasmatic Nucleus 2235
Introduction 2235
Putative Circadian Clock Genes 2236
Suprachiasmatic Nucleus Circadian Clockwork Mechanisms 2237
Structural and Functional Features of Clock Proteins 2238
Patterns of Clock Gene Expression in the Suprachiasmatic Nucleus 2239
Regulation of Clock mRNA and Protein Expression and Function 2240
Regulation of Clock mRNA and Protein Expression by Light 2241
Summary 2241
Further Reading 2241
Circadian Genes and the Sleep-Wake Cycle 2243
Introduction 2243
Systems-Level Studies: Suprachiasmatic Nucleus Lesions 2243
Genetics-Level Studies: Mammalian Circadian Clock Genes 2244
Clock, Bmal1, and Npas2 2244
Cryptochrome and Period 2246
Summary 2247
Further Reading 2248
Circadian Metabolic Rhythms Regulated by the Suprachiasmatic Nucleus 2249
Organisms Exhibit Metabolic Rhythms: Daily and Annual Rhythms 2249
The SCN Generates Metabolic Rhythms 2249
How Does the SCN Induce Rhythms in Metabolic Systems? 2249
The Endocrine System 2249
Autonomic Output 2252
Integration of Glucose Rhythms and Energy Balance 2253
Interaction of the SCN with Hypothalamic Nuclei Involved in Energy Balance 2253
Sensing energy stores 2253
Interaction with Other Hypothalamic Nuclei 2253
What is the Relevance of Metabolic Rhythms? 2254
Anticipation of Changes in Energy Requirement 2254
Metabolic Rhythms without the SCN; Food Entrainment 2255
The Metabolic Syndrome: A Brain Disease? 2255
Ignoring the Signal of the Clock 2255
Further Reading 2257
Circadian Organization 2259
Introduction 2259
Age-Related Changes in Inputs to the Circadian Clock 2259
Age-Related Changes in the Master Central Circadian Clock 2260
Age-Related Changes in Function of the Downstream Effector System 2261
Attenuating or Reversing Age-Related Changes in Circadian Organization 2261
Can Circadian Dysfunction Affect Aging? 2263
Further Reading 2263
Circadian Organization in Non-Mammalian Vertebrates 2265
Introduction 2265
Pineal Organ and Melatonin 2265
Hypothalamic Clocks 2268
The Eyes as Photoreceptors 2269
The Eyes as Circadian Pacemakers 2269
Extraretinal Photoreceptors 2270
Peripheral Oscillators 2270
Further Reading 2272
Circadian Oscillations in the Suprachiasmatic Nucleus 2273
Circadian Rhythmicity of SCN Tissue In Vivo and In Vitro 2273
Multiple Single-Cell Circadian Oscillators within the SCN 2274
Structural and Functional Heterogeneity of SCN Neurons 2275
Coupling Mechanisms for Coordinating SCN Cellular Oscillators 2276
The Search for Morning and Evening Circadian Clocks 2277
For the Future: From Intracellular Oscillations to Temporal Programs 2278
Further Reading 2278
Circadian Regulation by the Suprachiasmatic Nucleus 2279
Functional Properties of the Mammalian Circadian Clock in the Suprachiasmatic Nucleus 2279
Hierarchy and Cell-Autonomous Nature of Circadian Clocks in Mammals 2279
Functional Differences between Circadian Clocks in the Suprachiasmatic Nucleus, Peripheral Tissues, and Fibroblasts 2280
The Search for Critical Output Signals of the Suprachiasmatic Nucleus 2282
Future Developments 2284
Further Reading 2284
Circadian Regulation in Invertebrates 2285
Introduction 2285
Localization of Circadian Oscillators 2285
Pacemakers in the Molluscan Retina 2285
Pacemakers in the Arthropod Brain 2286
Circadian Pacemakers outside the Nervous System 2287
Multioscillator Organization of the Pacemaking System 2288
Localization of Photoreceptors and Mechanisms of Entrainment 2288
Extraretinal Photoreceptors 2288
Participation of Retinal Photoreceptors in Entrainment 2289
Cellular Mechanisms of Entrainment by Light 2289
Identification of Output Pathways 2290
Rhythms in Insect Development 2290
Rhythms in Retinal Sensitivity to Light 2290
Further Reading 2290
Circadian Rhythm Models 2291
Introduction 2291
Early Models Illustrated Essential Roles of Negative Feedback and Posttranslational Modifications 2291
Recent Models Consider Additional Positive Feedback and Simulate the Effects of Mutations 2292
Models Have Increased the Understanding of Entrainment and Phase-Shifting by Light Cycles, Light Pulses, and Temperature Chang 2293
Models Illustrate Sensitivity of Rhythms to Stochastic Molecular Noise and Suggest Mechanisms to Enhance Noise Resistance 2295
Models Examine the Efficacy of Proposed Mechanisms of Intracellular Synchronization 2295
Directions for Research 2296
Conclusion 2296
Further Reading 2296
Circadian Rhythms in Sleepiness, Alertness, and Performance 2299
Introduction 2299
Identifying the Circadian Rhythm in Sleep and Wakefulness 2299
Subjective Measures of Fatigue and Alertness 2299
Cognitive Performance 2300
Electroencephalographic and Ocular Measures 2300
Midafternoon Dip 2301
Problems in Detecting Circadian Rhythmicity in Performance 2301
Practice Effects and Other Artifacts 2301
Interindividual and Intraindividual Variability 2301
Circadian Rhythmicity and Sleep-Wake Cycles 2302
Sleep Deprivation 2302
Sleep-Wake Regulation 2302
Forced Desynchrony 2302
Ultraradian Days 2303
Circadian Disorders 2303
Accident Risk 2303
Conclusion 2304
Further Reading 2304
Circadian Rhythms: Influence of Light in Humans 2305
Circadian Organization in Humans 2305
Circadian Photoreception in Humans 2305
The Effect of Visual Impairment on Circadian Rhythms 2305
Spectral Sensitivity of Circadian Photoreception 2308
Extraocular Circadian Photoreception 2308
Measuring Circadian Rhythms in Humans 2309
Circadian Phase and Amplitude 2309
Circadian Period 2309
Resetting the Human Circadian Pacemaker with Light 2310
Circadian Entrainment 2310
Properties of Light and Circadian Resetting 2310
Timing 2310
Intensity 2312
Duration and pattern 2312
Wavelength 2312
Photic history 2313
Other Neuroendocrine and Neurobehavioral Effects of Light 2314
Circadian Rhythm Disorders and Light 2315
Shift work 2315
Jet lag 2317
Advanced and delayed sleep phase syndrome 2318
Unusual environmental photoperiods 2318
Aging 2320
Psychiatric disorders 2320
Further Reading 2322
Circadian Systems: Evolution 2323
Introduction 2323
Fundamental Properties 2323
Function 2323
Physiological Organization and Evolution 2324
Photoreceptors for Entrainment 2324
Localization of Circadian Oscillators 2325
Phase Control and the Evolution of Circadian Systems 2326
Caveats 2329
Summary 2329
Further Reading 2329
Circumventricular Organs 2331
Introduction 2331
The Blood-Brain Barrier 2331
Features of CVOs 2331
Sensory CVOs 2331
Subfornical Organ 2332
Organum Vasculosum of the Lamina Terminalis 2332
Area Postrema 2332
Properties and Sensory Abilities of CVO Neurons 2332
Angiotensin II Sensing 2333
Sodium Sensation 2333
Osmosensitivity 2333
Calcium Sensation 2333
Secretory CVOs 2333
Roles of CVOs in Osmotic/Mineral Challenges 2334
CVOs in the Regulation of Thirst by Intracellular Dehydration 2334
CVOs in the Regulation of Thirst by Hypovolemia 2334
CVOs in the Regulation of Salt Appetite 2335
CVOs and the Gustatory Aspects of Salt Appetite 2335
CVOs as Controllers of Integrated Autonomic Function 2335
Further Reading 2335
Circumventricular Organs in Neuroendocrine Control 2337
Introduction 2337
Functional Roles for CVOs 2337
Biochemical Properties and Anatomic Connections 2338
Further Reading 2340
CIRL/Latrophilins 2341
Discovery of CL1 2341
Structure of CLs 2341
CL1 Is a Major alpha-Latrotoxin Receptor 2342
Role for CL1 in alpha-Latrotoxin-Stimulated Neurotransmitter Release in the Presence of Extracellular Ca2 2343
Role for CL1 in alpha-Latrotoxin-Stimulated Neurotransmitter Release in the Absence of Extracellular Ca2 2343
CLs Are Conserved Proteins: Lessons from Caenorhabditis elegans 2344
Biological Functions of CLs 2344
Further Reading 2345
Clathrin and Clathrin-Adaptors 2347
Introduction 2347
Clathrin 2347
Clathrin Adaptors 2347
Initiation of Endocytic Complex Assembly by Clathrin Adaptors 2348
Roles of Clathrin and Clathrin Adaptors during Vesicle Formation 2349
Regulation of Clathrin Adaptors: Interactions and Functions 2350
Summary 2350
Further Reading 2351
Clock Gene Regulation of Endocrine Function 2353
Introduction 2353
Circadian Control of the Endocrine System 2353
Circadian Clock Genes and the Endocrine System 2353
Circadian Clock Genes and Endocrine Pathophysiology 2354
Further Reading 2355
Clock Genes and Metabolic Regulation 2357
Central Nervous System Organization of Mammalian Circadian Rhythms 2357
The Clock Is Universal 2357
Light: Zeitgeber and Photoreception 2357
Suprachiasmatic Nucleus: Integration of Metabolic and Circadian Signals 2357
Overview 2357
Suprachiasmatic nucleus neural circuits 2357
Neuroendocrine signals influence the suprachiasmatic nucleus clock 2359
The Molecular Clock in Neural and Peripheral Metabolic Cells 2359
The Discovery of Mammalian Clock Genes 2359
Metabolic Transcription Factors Participate in the Circadian Oscillator 2359
Clock Genes in Extra-Suprachiasmatic Nucleus Neurons and Peripheral Tissues 2360
Food Entrainment of the Clock 2360
Circadian, Sleep, and Metabolic Disorders in Humans 2361
Epidemiology of Sleep and Metabolic Disorders 2361
Narcolepsy and Energy Balance 2362
Molecular Interconnection between the Circadian and Metabolic Systems 2362
Role of Cellular Redox State and Chromatin Remodeling in Clock Gene Transcription 2362
Insight from Experimental Genetic Models into Links between Circadian and Metabolic Systems 2362
Future Questions 2363
Further Reading 2363
Cochlear Development 2365
The Structure of the Cochlea 2365
The Embryonic Origins of the Cochlea 2365
Otic Induction 2365
Axial Polarity and Patterning of the Cochlea 2367
Morphogenesis of the Cochlea 2368
Specification of Tissue Types 2370
Specification of Sensory Cells 2370
Hair Bundle Polarity 2372
Spiral Ganglion Neurons 2372
Further Reading 2374
Relevant Website 2374
Cochlear Mechanics 2375
Introduction 2375
Cochlear Vibration and the Active Process 2375
Nonlinear Growth of Macromechanical and Micromechanical Vibration with Sound Level 2378
Why Does the Wave Travel from Base to Apex? It's Cochlear Hydrodynamics, Not Stapes Drive 2379
Sensorineural Hearing Loss and the Frequency Threshold Curve 2380
Motor Losses: OHC Problems with No IHC/Neural Disruption (Noise Trauma, Hydrops, and Fistula) 2381
Sensory Losses: IHC/Neural Problems with Normal OHCS 2382
Mixed Cochlear Losses: Drug Blockade, Cochlear Hypoxia, and Morphological Disruption 2382
Concluding Remarks 2383
Further Reading 2383
Cochlear Prosthesis 2385
Introduction 2385
Electrode Arrays 2385
Speech Processors 2386
Clinical Results 2386
Further Reading 2388
Cognition in Aging and Age-Related Disease 2389
Introduction 2389
Cognitive Declines with Healthy Aging 2389
Domain-General Theories of Cognitive Aging 2389
Sensory deficits 2389
Inhibition 2389
Speed of processing 2390
Domain-Specific Theories of Cognitive Aging 2390
Word-finding difficulties and transmission deficits 2390
Contextual memory and associative binding deficits 2391
Preserved Cognitive Function with Healthy Aging 2391
Crystallized Intelligence 2391
Emotion Regulation 2391
Neural Changes with Healthy Aging 2392
Changes in Prefrontal Cortex 2392
Medial Temporal Lobe Changes 2392
Changes in Emotion Processing Regions 2393
Mild Cognitive Impairment 2393
Alzheimer's Disease 2393
Cognitive Changes in AD 2393
Episodic memory 2393
Semantic memory 2394
Working memory and executive function 2394
Neural Changes in AD 2394
Neural Changes in Later-Stage AD 2394
Individual Differences in Aging 2394
Further Reading 2395
Cognition: An Overview of Neuroimaging Techniques 2397
Anatomical Techniques 2397
Functional Techniques 2397
Classes of Functional Neuroimaging Techniques 2397
Direct measures of neural activity: EEG and MEG 2397
Indirect measures of neural activity: PET 2398
Indirect measures of neural activity: fMRI 2398
Related Techniques 2399
Optical Brain Imaging 2399
Trade-Offs between Temporal and Spatial Resolution 2399
Advantages and Limitations of Neuroimaging Techniques 2399
Contributions to the Study of Cognition 2400
Further Reading 2401
Cognition: Basal Ganglia Role 2403
Introduction 2403
Anatomical and Neurochemical Considerations 2403
Cognitive Control: Preparing, Initiating, Inhibiting, and Switching Responses 2403
Stimulus-Response Behavior 2404
Task Switching 2405
Rewards: Modulation of Striatal Signal Processing by Biological Feedback 2406
Learning, Memory, Skills, and Habits 2408
Synthesis 2410
Further Reading 2411
Relevant Websites 2411
Cognition: Cerebellum Role 2413
Introduction 2413
Functional Neuroimaging Studies 2413
Verbal Working Memory 2413
Verbal Fluency 2413
Cognitive Flexibility 2414
Reasoning/Planning 2414
Dual Tasks 2414
Random Number Generation 2415
Theory of Mind 2415
Patient Studies 2415
Neurological Disorders 2415
Developmental Disorders 2416
Attention-deficit/hyperactivity disorder 2416
Autism spectrum disorder 2417
Dyslexia 2417
Schizophrenia 2417
Individuals born very preterm 2418
Substance Abuse 2418
Cerebro-Cerebellar Interactions 2418
Further Reading 2419
Cognition: Neuropharmacology 2421
Dopamine 2421
Norepinephrine 2423
Serotonin 2425
Acetylcholine 2426
Summary 2427
Further Reading 2428
Cognitive Control and Development 2429
Evidence of Cognitive Control in Infancy 2429
Evidence of Cognitive Control in Early Childhood 2430
Evidence of Cognitive Control in Late Childhood and Adolescence 2430
Cortical Organization Underlying the Development of Cognitive Control 2430
Development of Brain Connectivity and Cognitive Control 2431
A Developmental Model of Cognitive Control 2432
Conclusions 2433
Further Reading 2433
Cognitive Deficits in Schizophrenia 2435
Why Study Cognitive Deficits in Schizophrenia? 2435
Article Overview 2435
Cognitive Endophenotypes 2435
Executive Function Deficits 2436
Inhibition 2436
Task Switching 2436
Working Memory 2437
Response Monitoring 2437
Declarative Memory 2438
Thought, Language, and Semantic Memory Disturbances 2439
Challenges and Potential Confounds in the Study of Cognition 2439
Heterogeneity 2439
Variability 2439
Amotivation 2440
Medications 2440
Generalized Deficit 2440
Are There Fundamental Deficits That Give Rise to Widespread Cognitive Disturbance? 2440
Attention 2440
Deficient Automation 2441
Context Processing 2441
Promising Advances in the Study of Cognition 2441
Imaging Genetics 2441
Neuroimaging Advances 2441
Further Reading 2442
Relevant Website 2443
Cognitive Dysfunction in Psychiatric Disorders 2445
Working Memory 2445
Working Memory in Schizophrenia 2445
Phonological Loop 2445
Visual-Spatial Scratch Pad 2446
Central Executive Function 2446
Executive Control in Schizophrenia 2447
Context Processing 2447
Conflict Detection/Error Monitoring 2447
Episodic Memory 2447
Episodic Memory in Schizophrenia 2448
Binding Functions 2448
Impairments in Strategic Contributions to Episodic Memory 2448
Prefrontal Abnormalities in Schizophrenia during Episodic Memory 2448
Specificity of Cognitive Deficits to Schizophrenia 2449
Summary 2449
Further Reading 2450
Cognitive Neuroscience: An Overview 2451
Further Reading 2456
Color Vision 2457
Introduction 2457
The Photodetectors, Opsins 2457
The Evolution of Vision 2457
Color Vision 2458
Energy versus Spectral Contrast 2460
Trivariant Color Vision 2461
The Midget System's Double-Duty Role 2461
The Retinex Theory 2462
Double Opponent Cells 2462
The Organization of Color Vision in Visual Cortex 2463
Color and Form Vision 2464
Is There a Separate Color Area in Visual Cortex? 2464
Tetravariant Color Vision 2464
Further Reading 2465
Coma 2467
Two Dimensions of Consciousness: Arousal and Awareness 2467
Nosology of Disorders of Consciousness 2467
Brain Death 2467
Coma 2468
VS 2469
MCS 2469
LIS 2470
Clinimetric Evaluation, Diagnosis, and Prognosis 2470
Consciousness Scales 2470
Brain Death 2470
Coma 2470
VS 2471
MCS 2471
LIS 2471
Residual Cerebral Function 2471
Brain Death 2471
Coma 2472
VS 2472
MCS 2475
LIS 2475
Conclusion 2476
Further Reading 2476
Coma and Other Pathological Disorders of Consciousness 2477
Introduction 2477
Underlying Mechanisms of Pathologic Coma 2477
Related Global Disorders of Consciousness 2478
Vegetative State 2478
Minimally Conscious State 2479
Akinetic Mutism 2479
Prognosis in Coma, Vegetative State, and Minimally Conscious State 2479
Underlying Mechanisms of Pharmacologic Coma 2480
Further Reading 2480
Command Systems 2483
Introduction 2483
Command Systems: Command versus Decision Making 2483
Historical Issues 2483
Network Architecture: Command and Central Pattern Generators 2483
Hierarchical and Parallel Organizations 2484
Drivers and Modulators 2485
Model Systems and Command Functions 2485
Related Behaviors: Reconfiguration of Multifunctional Central Pattern Generators 2485
Different Behaviors: From Behavioral Hierarchy to Adaptive Decision Making 2488
More Elaborate Neural Networks Involved in Motor Commands in Vertebrates 2490
Summary 2491
Further Reading 2492
Communication in Frogs and Toads 2493
Introduction 2493
Origin and Mechanisms of Sound Production 2493
Receivers 2494
The Auditory System 2494
Tympanic membrane and middle ear 2494
Inner ear 2495
Central Processing 2496
Behavior and Evolution 2496
Other Modes and Multimodal Communication 2496
Male Calling 2497
Mate Recognition 2498
Species recognition 2498
Sexual selection 2499
Eavesdroppers on Frog Communication by Predators 2499
Further Reading 2500
Communication in Terrestrial Animals 2501
Introduction 2501
How Mammal Calls Are Produced 2501
The Source and the Filter 2501
Contexts in Which Terrestrial Mammals Call 2502
Intraspecific 2502
Social communication 2502
Calling and territoriality 2503
Communication within the social group 2503
Sexual Communication 2503
Loud calls and sexual behavior 2503
Calling rate and male-male contests 2503
Effects of calling on females 2504
Alternative routes to honest signaling in mammal calls 2504
Loud mating calls in other mammals 2505
Interspecific Communication 2505
Further Reading 2505
Communication in the Honeybee 2507
The Life of Honeybees 2507
Chemical Communication 2507
Communication by Tactile and Vibration Signals 2507
Dance Language 2508
Further Reading 2511
Communication Networks and Eavesdropping in Animals 2513
Communication Networks 2513
Communication Behaviors Specific to Networks 2513
Signaling Behavior Best Explained by Networks 2513
Signal synchrony in choruses 2513
High level of close-range signals 2514
Directing signals in a network 2514
Eavesdropping 2514
Networks and Eavesdropping 2514
Two Categories of Eavesdropping 2514
Interceptive Eavesdropping 2515
Social Eavesdropping 2515
Acoustic Interactions in Songbirds 2516
Visual Interactions in Fish 2516
Effects of an Audience 2517
Further Reading 2517
Comparative Biology of Invertebrate Neuromuscular Junctions 2519
Invertebrates Investigated 2519
Muscle Innervation 2520
Diversity across Phyla 2520
Crustacean Limb Muscles 2521
Drosophila Larval Abdominal Muscles 2522
Other Arthropod Muscles 2523
Nematodes 2523
Mollusks 2525
Structural Features of Invertebrate Neuromuscular Junctions 2525
Synapses 2525
Active Zones 2526
Neuroactive Substances and Receptors 2529
General Features 2529
Postsynaptic Ionotropic Glutamate Receptors 2529
Other Invertebrate Neuromuscular Receptors 2532
Retrograde Modulation of Synaptic Strength 2537
Physiological Features 2538
Synaptic Diversity of Single Neurons 2539
Synaptic Specialization of Different Motor Neurons 2540
Conclusion 2541
Further Reading 2542
Comparative Neurobiology: History 2545
Introduction 2545
Origins 2545
Neuroanatomy in an Evolutionary Context 2546
Functional Mapping 2547
Simpler Systems 2548
Brain Size 2550
Evolutionary Developmental Neurobiology 2551
Further Reading 2554
e9780080446172v3 2555
Front Cover 2555
Encyclopedia of Neuroscience 2556
Copyright Page 2559
Senior Editors 2560
Associate Editors 2562
Table of Contents 2566
Foreword 2572
Preface 2574
Volume 3 2576
C 2576
Complexins 2576
Introduction 2576
Expression and Localization 2576
Structure and Biochemical Features 2577
Mechanism of Complexin Function 2578
Pathological Function of Complexin 2581
Future Directions 2581
Further Reading 2582
Computational Approaches to Motor Control 2584
Introduction 2584
The Problem of What to Do 2584
The Major Reward System in the Brain Is the Neurotransmitter Dopamine 2585
Balancing Expected Rewards with Motor Costs 2587
The Problem of How to Do It: Minimizing Costs to Find a Control Policy 2588
Effects of Damage to the Basal Ganglia on Representation of the Cost Function 2589
Cerebellar Damage and the Ability to Predict Sensory Consequences of Motor Commands 2589
Further Reading 2591
Computational Methods 2594
Introduction 2594
Brain Models 2594
Compartmental Models 2595
Network Models 2596
Learning Models 2596
Technology for Brain Modeling 2596
Concluding Remarks 2597
Further Reading 2597
Computational Neuroethology 2598
Definitions 2598
History 2598
Conceptual Framework 2598
Goals and Methodology 2599
Examples 2600
Embodiment: Biomechanics and Neural Control 2600
Situatedness: Coupling among the Environment, the Periphery, and the Nervous System 2601
Active Perception 2601
Cognition and Intelligence 2602
Summary and Conclusions 2602
Further Reading 2602
Conditioned Reflex 2604
The Discovery of the Conditioned Reflex 2604
Classical Conditioning 2604
Classical Conditioning of the Eyeblink Response 2604
Eyeblink Conditioning in Aging Mammals 2605
Rodents 2605
Rabbits 2606
Humans 2607
Brain Substrates of Eyeblink Classical Conditioning 2607
Involvement of the Cerebellum in Associative Learning 2607
Involvement of the Hippocampus in Eyeblink Classical Conditioning 2608
Normal Aging in the Hippocampus and Cerebellum 2608
Amelioration of Eyeblink Classical Conditioning in Older Organisms 2608
Further Reading 2609
Conditioned Taste Aversion 2610
Introduction 2610
The Conditioned Taste Aversion Paradigm 2610
Neural Circuitry Implicated in CTA 2611
Area Postrema 2611
Nucleus Tractus Solitarius 2612
Pontine Parabrachial Nucleus 2612
Thalamus 2612
Hypothalamus 2612
Globus Pallidus 2612
Amygdala 2612
Hippocampus 2612
Prefrontal Cortex 2612
Insular Cortex 2613
AnatomicaSummary 2613
Effects of Aging on CTA Learning 2614
Biochemical and Metabolic Factors Related to Aging and CTA 2615
Genetic Factors Related to Aging and CTA 2615
Clinical Features of Aging Relevant to the CTA Paradigm 2615
Conclusions 2615
Further Reading 2616
Relevant Website 2616
Conditioning: Simple Neural Circuits in the Honeybee 2618
The Antennal Lobe and the Mushroom Body Are Sequentially Involved in the Olfactory Memory Trace 2618
Single Neuron Activity Correlate with Olfactory Learning 2618
Neural Circuits Underlying Olfactory Conditioning: Signaling Cascades Mediating CS and US Stimuli 2619
Molecular Signaling Cascades in the ALs Are Critical for the Induction of Olfactory Memory Traces 2619
Glutamate-Mediated Signaling Cascades in the MBs Contribute to LTM Formation 2620
Parallel Molecular Processes Contribute to LTM Memory Formation 2621
Further Reading 2621
Conditioning: Theories 2624
Background 2624
Notions Received from Pavlov 2624
The Linear Rule 2624
Contingency Effects and the Delta P Rule 2624
The Rescorla-Wagner Rule 2625
Current Issues 2626
Inhibitory Learning during Extinction 2626
Elementistic versus Configural Stimulus Representation 2626
Representation of Time in Conditioning 2627
Stimuli Trained in Compound Do Not Have a Fully Common Fate 2628
Priming Phenomena 2629
Divergence of Response Measures 2630
Learning Occurring with Absent Stimuli 2631
Further Reading 2632
Cone Photopigment Evolution 2634
Essential Features of Cone Photopigments 2634
Linking Opsin Genes and Cone Opsins 2634
Opsin Gene Families and Their Evolutionary Histories 2636
Mammalian Cone Pigment Evolution 2637
Primate Cone Pigment Evolution 2638
Evolution of SWS1 Cone Pigments 2638
Cone Pigment and Color Vision Evolution 2639
Summary 2640
Further Reading 2640
Relevant Website 2640
Congenital Muscular Dystrophy 2642
Introduction and History of the Concept of Congenital Muscular Dystrophy 2642
Disorders of alpha-Dystroglycan Glycosylation 2642
Walker-Warburg Syndrome 2643
Muscle-Eye-Brain Disease 2643
Fukuyama Congenital Muscular Dystrophy 2644
Other Phenotypes 2644
Laminin 2 (Merosin)-Deficient Congenital Muscular Dystrophy 2644
Disorders of Collagen VI (CMD Types Ullrich and Bethlem) 2647
CMD Type Ullrich 2647
Bethlem Myopathy 2648
Congenital Muscular Dystrophy with Spinal Rigidity 2648
Selenoprotein N-Related CMD 2648
Lamin A/C-Related CMD 2648
Further Reading 2649
Connectionist Models 2650
History 2650
The Modern Period 2651
Basic Properties of Connectionist Networks 2653
A Set of Units 2653
An Activation State 2653
A Weight Matrix 2653
An Input Function 2653
A Transfer Function 2653
A Learning Rule 2653
A Model Environment 2654
Appeal of Connectionist Models 2654
Symbolic versus Connectionist Approaches 2655
Biological Plausibility 2656
Further Reading 2657
Connectionist Models of Language Processing 2658
Introduction 2658
Constituency 2658
Structure Dependency 2662
Recursion 2663
Connectionist Models of Language Processing 2664
Further Reading 2665
Connectivity of Primate Reward Centers 2666
Introduction 2666
Prefrontal Cortex 2666
The Ventral Striatum 2666
The Amygdala 2668
The Midbrain Dopamine Neurons 2668
Afferent Projections 2668
Efferent Projections 2670
Completing the Cortical-Basal Ganglial Reward Circuit 2670
Complex Network Features of the Reward Circuit 2671
The Cortical-Striatal Network 2671
The Striatal-Nigral-Striatal Network 2671
Summary 2673
Further Reading 2673
Consciousness: Neural Basis of Conscious Experience 2674
Basic Definitions and Concepts 2674
Physical Nature; System Property 2674
Reports of Conscious Experience versus Behavioral Detection 2675
Do Animals Have Conscious Experience? 2675
Are Computers Conscious? 2675
Studies of Neural Basis 2675
Effects of Cerebral Lesions 2675
Regional Cerebral Blood Flow and Metabolism 2676
Electrophysiological Stimulation and Recording 2676
Time Factors in Conscious and Unconscious Mental Functions 2677
Neural Delay for Sensory Experience 2677
Neural Delay for Intention to Act 2677
'Time-On' Theory for Conscious versus Unconscious Functions 2677
Unity of Conscious Experience 2678
A testable field theory 2678
Further Reading 2678
Consciousness: Neurophysiology and Visual Awareness in 2680
Consciousness as a Neurophysiological Problem 2680
Requirements for Establishing the NCC 2680
Techniques to Study the Neurophysiology of Consciousness 2684
Single-Unit Recordings Accompanied by Anatomical Analysis 2684
Functional Magnetic Resonance Imaging 2684
Macroscopic Optical Imaging 2686
Two-Photon Laser Scanning Microscopy 2687
Current Findings on Visibility and Visual Awareness 2688
Future Challenges 2689
Further Reading 2690
Relevant Website 2691
Consciousness: Philosophy 2692
The Two Problems of Consciousness 2692
Consciousness and the Brain: Facts and Enigmas 2692
Phenomenology: Consciousness as Information Integration 2693
Measuring Information Integration 2694
Effective Information 2695
Information Integration 2695
Complexes 2695
Consciousness, Information Integration, and the Brain 2696
Thalamocortical System 2696
Cerebellum 2696
Split Brain 2696
Cortical Input and Output Systems 2697
Basal Ganglia and Cortico-Subcortical Loops 2697
Slow-Wave Sleep 2697
Spatial and Temporal Scales 2697
A Few Corollaries and Predictions 2698
Further Reading 2698
Consciousness: Theoretical and Computational Neuroscience 2700
What Phenomena Does a Science of Consciousness Need to Explain? 2700
Distinctions between States and Levels of Consciousness 2701
Neuronal Correlates of Consciousness 2701
Zombie Behaviors 2703
Consciousness and Information Integration 2703
Further Reading 2704
Consciousness: Theories and Models 2706
Introduction 2706
Major Features 2706
Conscious Events Recruit Widespread Brain Activity 2706
Integration and Dissemination of Focal Information 2706
Fast Cortical Interactions (Gamma-Theta) 2707
Current Theories and Models 2708
Qualitative and Hybrid Architectures 2708
Dynamical and Field Theories 2709
Neural Darwinism 2709
Other Approaches 2710
Summary 2711
Further Reading 2711
Relevant Websites 2711
Contextual Interactions in Visual Perception 2712
Introduction 2712
Phenomenology 2712
First-Order Spatial Interactions 2712
Subjective estimates of light intensity 2712
Sensitivity to changes in light intensity 2714
Neurophysiological correlates 2714
Second-Order Spatial Interactions 2714
Subjective estimates of light contrast 2714
Sensitivity to changes in light contrast 2714
Neurophysiological correlates 2715
Spatial Interactions with respect to the Perception of Motion 2715
Spatial Interactions with respect to the Perception of Depth 2715
Plasticity of Contextual Interactions 2715
Functional Significance 2716
Surface Properties 2716
Segmentation 2717
Further Reading 2717
Contextual Interactions in Visual Processing 2720
History 2720
Perception: Back to Gestalt from a New Reductionism 2720
Neurophysiology: The Changing Concept of the Receptive Field 2720
Neuroanatomy: The Substrate underlying Contextual Influences 2721
The Role of Contextual Modulation 2722
Grouping Lines into Smooth Contours 2722
Completing Occluded Surfaces 2723
Explicitly Identifying Border Ownership 2724
Figure versus Background 2725
Border Ownership and Visual Motion Perception 2726
Filling 'Holes' in the Visual Stimulus 2729
Signaling Surface Luminance 2729
Perceptual Learning and Task-Dependent Changes in Contextual Influences 2729
Conclusion 2731
Further Reading 2732
Cornelia De Lange Syndrome 2734
Introduction 2734
Clinical Features 2734
Structural Features 2734
Neurodevelopmental Features 2734
Clinical Variability 2734
Genetics 2735
The Cohesin Complex 2736
Long-Range Enhancer-Promoter Interaction and Control of Gene Expression 2736
Further Reading 2736
Relevant Websites 2737
Corpus Callosum: Agenesis 2738
Introduction 2738
Embryology of Human Corpus Callosum Development 2738
Embryology of Mouse Corpus Callosum Development 2739
Factors Shaping the Development of the Corpus Callosum 2740
Agenesis of the Corpus Callosum in Humans 2740
Congenital Malformations of the Corpus Callosum 2740
Symptoms of Patients with Congenital Callosal Agenesis 2741
Differences between Congenital Callosal Agenesis Patients and Those with Complete or Partial Callosotomy 2742
Acquired Malformations or Lesions of the Corpus Callosum 2742
Vascular or arteriovenous malformations 2742
Repair of hydrocephalus 2742
Trauma 2742
Demyelinating diseases 2743
Tumors 2743
Generalized etiology 2743
Understanding the Genetic Etiology of Congenital Agenesis of the Corpus Callosum 2743
Genetic syndromes/disorders/malformations 2744
Chromosome aberrations 2744
Agenesis of the Corpus Callosum in Mouse 2744
Murine Strains with Spontaneous Callosal Agenesis 2744
Genetically Engineered Models of Callosal Agenesis 2746
Complete agenesis of the corpus callosum 2747
Hypoplasia/dysgenesis of the corpus callosum 2748
Concluding Remarks 2748
Further Reading 2748
Cortical Control of Eye Movements 2750
Introduction 2750
The Neural Circuits of Visually Guided Saccadic Eye Movements as Revealed by Anatomical and Physiological Studies 2750
The Effects of Selected Lesions on Saccadic Eye-Movement Generation 2752
Eye Movements Elicited by Two Visual Targets and by Electrical Stimulation at Two Brain Sites 2752
Eye Movements Elicited by Combined Visual and Electrical Stimulation 2752
The Visual Percept Elicited by Electrical Stimulation of Area V1 2753
The Role of Cortical GABAergic Inhibitory Circuits in the Generation of Saccadic Eye Movements 2753
Outline of the Basic Tasks and the Neural Circuitry Involved in the Generation of Visually Guided Saccadic Eye Movements 2754
Further Reading 2756
Cortical Plasticity and Learning: Mechanisms and Models 2758
Introduction 2758
Experience-Dependent Cortical Plasticity 2758
Models of Cortical Plasticity 2759
Structure from Correlations 2759
Postsynaptic normalization 2760
Sliding threshold for LTP and LTD 2760
Mechanisms and Cellular Correlates of Cortical Plasticity 2761
Cortical Plasticity: Spatiotemporal Stimuli 2762
Conclusion 2763
Further Reading 2763
Cortical Processing of the Reward Value of Food 2764
The Pleasantness of the Taste of Food 2764
Sensory-Specific Satiety 2764
Representation of the Pleasantness of the Smell and Sight of Food in the Brain 2765
Mouth Feel of Fat: Orbitofrontal Cortex, Primary Taste Cortex, and Amygdala 2767
Imaging Studies in Humans 2768
Taste 2768
Odor 2768
Olfactory-Taste Convergence to Represent Flavor, and the Influence of Satiety 2768
Oral Viscosity and Fat Texture 2768
The Sight of Food 2769
Satiety Signals 2769
Further Reading 2770
Corticomotoneuronal System 2772
Definition 2772
Anatomy of the CM System 2772
Pattern of Termination 2772
Distribution of CM Projections to Different Motor Nuclei 2772
Origins of CM Projections 2772
Physiology of the CM System 2773
Electrical Stimulation Methods 2773
Identification of Monosynaptic CM Effects in Motor Neurons 2773
Physiological Properties of CM Synapses 2773
Distribution of CM Effects in Different Motor Nuclei 2773
Origins of CM Effects 2773
Transcranial Stimulation in Humans 2773
Identification of CM Effects by Spike-Triggered Averaging 2774
Distribution of CM Effects in Different Motor Neuron Pools 2774
Development of the CM System 2775
Lesions Affecting CM Function 2775
Pathological Diseases Affecting CM Function 2776
Functional Significance of the CM System 2776
Further Reading 2777
Corticospinal Development 2778
Introduction 2778
Phases and Time Course of CS System Development 2778
CS Neuron Differentiation 2778
Development of the Projection to the Brain Stem and Spinal Cord 2779
Pathfinding from Cortex and Subcortical White Matter Tracts 2779
Decussation and Midline Crossing 2779
Collateral Branching into the Gray Matter 2780
Development of Connectional Specificity between CS Axon Terminals and SC Neurons 2780
Topographic Refinement of CS Terminations in the Spinal Gray Matter 2780
Activity-Dependent Refinement of CS Axon Terminal Connections 2783
Use-Dependent Development of the CS Tract 2785
Development of CS Control of Skilled Motor Behavior 2785
Development of the Cortical Motor Map 2787
Conclusion and Implications for Rehabilitation 2788
Further Reading 2789
Corticothalamic Connections: Structure and Function 2790
Introduction 2790
From Cortex to Thalamus: A Tale of Two Pathways 2790
Cortical Projections to the LGN 2790
Cortical Projections to the Pulvinar 2791
Corticothalamic Physiology and Function 2792
Conduction Latency 2792
Synapses and Receptors 2792
The Influence of Corticothalamic Feedback on Sensory Processing 2793
Conclusion 2794
Further Reading 2794
Corticothalamic Connections: Ultrastructure 2796
Introduction 2796
Cells of Origin 2796
Layers 2796
Subtype Characteristics 2796
Terminal Arbors 2796
Light Microscopy 2796
Background 2796
Morphological subtypes 2797
Electron Microscopy 2798
Type 1 and Type 2 Boutons 2798
Postsynaptic Target 2798
Examples of postsynaptic targets in five nuclei 2800
RTN output 2802
RTN cortical inputs 2803
Convergence of Multiple Afferents 2803
Reciprocity of CT and TC Connections 2804
CT Terminations: Functional Roles 2804
Further Reading 2805
Corticotropin-Releasing Hormone and Urocortins: Binding Proteins and Receptors 2806
Discovery of CRF and Its Role in the Stress Response 2806
CRF: Founding Member of a Small Family of Neuropeptides 2806
CRF Family Neuropeptides Signal via One of Two CRF Receptors 2806
CRF-Binding Protein 2808
Central CRF Pathways Are Involved in Anxiety and Depression 2809
Feeding, Digestion, and Metabolism 2809
Cardiovascular Effects of Urocortins via CRFR2 2810
CRF and Pregnancy 2811
Summary 2811
Further Reading 2812
Corticotropin-Releasing Hormone: Integration of Adaptive Responses to Stress 2814
Introduction 2814
The CRF Family of Signaling Molecules 2814
The CAS and Its Role in Adaptive Responses to Stress 2816
Issues in Understanding CAS Activation by Central Peptide Administration and Stress 2818
CRFR Protein Expression 2818
Novel Receptors? 2818
Receptor Cross-Talk 2819
Interaction of CRFR- and CRFR2-Dependent Mechanisms 2819
Other Ligand-Binding Proteins 2819
Role of Ucns 2819
Significance 2819
Further Reading 2820
Cotransmission 2822
Early Background 2822
Sympathetic Nerve Cotransmission 2822
Parasympathetic Nerve Cotransmission 2824
Sensory–Motor Nerve Cotransmission 2824
Intramural Nerve Cotransmission 2825
CNS 2825
Physiological Significance of Cotransmission 2825
Fast and Slow Cotransmitters: Different Firing Patterns 2826
Different Cotransmitters Act on Different Postjunctional Cells 2826
Presynaptic Neuromodulation of Cotransmitter Release 2826
Synergism 2826
Negative Cross-Talk 2826
Cotransmitters and Trophic Factors 2826
Excitatory and Inhibitory Cotransmitters 2826
False Cotransmitters 2828
Coexisting Peptide Acting as a Neuromodulator 2828
Cotransmitter Plasticity: Control of Transmitter Expression 2828
Concluding Comments 2829
Further Reading 2829
Cranial-Cervical Dystonia 2830
Introduction and Definitions 2830
Causes 2831
Pathogenesis and Pathophysiology 2831
Treatment 2832
Further Reading 2833
Relevant Websites 2833
Cross-Modal Interactions Between Vision and Touch 2834
Introduction 2834
Involvement of Visual Cortical Areas in Tactile Perception in the Sighted 2834
Visual Imagery and Multisensory Representations 2835
Tactile Perception in the Blind and Its Involvement of Visual Cortex 2836
Further Reading 2837
Cyclic AMP (cAMP) Role in Learning and Memory 2840
Historic Background 2840
The cAMP Signaling Pathway 2841
Interactions among Intracellular Signaling Systems 2841
Genetic Evidence for the Role of cAMP in Learning 2842
The Role of Calmodulin-Sensitive AC 2842
cAMP-Dependent Signaling Plays a Central Role in Long-Term Learning 2842
How Does the cAMP Pathway Initiate Synaptic Modifications during Learning? 2843
Presynaptic Modulation by cAMP 2844
Evidence for Effects of cAMP That Enhance Transmitter Release during Long-Term Potentiation at Mammalian CNS Synapses 2844
Presynaptic Targets of PKA That Contribute to LTP or Synaptic Facilitation 2844
Phosphorylation of RIM1alpha Plays a Necessary Role in PKA-Dependent LTP at Mossy Fiber and Parallel Fiber Synapses 2844
Phosphorylation of Synapsin by PKA Regulates the Readily Releasable Pool of Vesicles 2845
Postsynaptic Modulation by cAMP: Regulation of Glutamate Receptors during LTP 2846
Localization of PKA via A Kinase Anchoring Proteins Is Necessary for cAMP-Dependent Synaptic Plasticity 2846
Role of cAMP and PKA in Initiating Long-Term Synaptic Plasticity 2848
cAMP-Dependent Phosphorylation Plays an Important Role in Initiating Stable Transcription-Dependent Long-Term Synaptic Plastic 2848
Presynaptic Contributions to Late-Phase LTP at CA3-to-CA1 Pyramidal Cell Synapses 2849
Persistently Activated Protein Kinase Contributes to Initiation of Long-Term Synaptic Facilitation 2849
Initiation of Long-Term Plasticity by cAMP Involves Phosphorylation of Transcription Factors, Including CREB: Interactions betw 2850
Summary 2850
Further Reading 2851
Cyclic Nucleotide-Gated and Hyperpolarization-Activated Channels 2854
Structural Features of Cyclic Nucleotide-Gated and Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels 2854
Functional Roles of CNG Channels in Visual and Olfactory Transduction 2854
Channelopathies and Knockout Models of the Rod Photoreceptor CNG Channel 2855
CNGA1 Subunit 2855
CNGB1a Subunit 2855
Channelopathies and Knockout Models of the Cone Photoreceptor CNG Channel 2857
CNGA3 Subunit 2857
CNGB3 Subunit 2857
Knockout Models of the Olfactory CNG Channel 2858
CNGA2 Subunit 2858
CNGA4 and CNGB1b Subunits 2858
Further Reading 2859
Relevant Websites 2859
Cysteine-String Proteins (CSPs) 2860
Introduction 2860
Molecular Anatomy of CSPs: J-Domain Proteins Highly Conserved in Evolution 2860
CSP Is Localized to Synaptic Vesicles and Secretory Granules 2863
Insights from CSP-Deficient Flies 2863
Studies of CSP Interactions with Voltage-Dependent Ca2+ Channels and Other Presynaptic Proteins 2863
Elucidating the Biological Function of Cysteine-String Proteins in CSPalpha-Deficient Mice 2864
Concluding Remarks and Perspectives 2867
Further Reading 2867
Cysticercosis: Cerebral 2868
Further Reading 2869
Cytokine Receptors in Glia 2870
Introduction 2870
The Interferon/Interleukin-10 Receptor Family 2870
Interleukin-6-Type Receptors 2871
The Interleukin-2 Receptor Family/gammaC 2871
Tumor Necrosis Factor Receptor Family 2872
Interleukin-1 Receptors 2873
Transforming Growth Factor-beta Receptors 2873
Chemokine Receptors 2874
Further Reading 2875
Cytoskeletal Interactions in the Neuron 2876
Plakins 2876
Connections between the Cytoskeleton and Cell Junctional Complexes 2876
Cytoskeletal Cross-Linking 2880
Intermediate Filament and Actin Connections 2880
Intermediate Filament and Microtubule Connections 2881
Actin and Microtubule Connections 2882
Concluding Remarks 2883
Further Reading 2884
Cytoskeleton in Plasticity 2886
Overview 2886
The Cytoskeleton at the Synapse 2886
The Presynaptic Terminal 2886
The Postsynaptic Terminal 2886
Dendritic Spines 2887
Dendritic Spines: Cytoskeleton 2887
Forms of Synaptic Plasticity 2888
LTP and Activity-Dependent Actin Remodeling 2888
Long-Term Depression 2889
Postsynaptic Signaling Pathways 2889
Mental Retardation and Dendritic Spines 2890
Concluding Remarks 2890
Further Reading 2891
D 2892
Deafness 2892
Assessment of Hearing 2892
Causes of Impaired Hearing 2892
Sites and Types of Abnormality 2893
Sensorineural Impairment 2894
Animal Models for Deafness 2895
The Cochlear Prosthesis 2895
Further Reading 2896
Decision-Making and Neuroeconomics 2898
Decision Theory in Economics 2898
Revealed Preferences 2898
Axioms 2898
Representation of Preferences 2899
Cardinal and Ordinal Utilities 2899
Stochastic Choice 2900
Economic Theories of Stochastic Choice 2900
The Random Walk Model of Decision 2901
The Predictions of the Model 2901
Decision Theory in Neuroscience 2901
The Computation of the Utility 2902
A Synthesis 2902
Risky and Ambiguous Choice 2902
Further Reading 2903
Decision-Making and Vision 2904
Introduction 2904
The Basic Accumulator Model for Decisions 2904
Simple Perceptual Decisions 2906
Behavioral Observations 2906
Physiological Observations 2908
Deciding to 'Go' 2909
Limitations and Extensions of Accumulator Models 2911
Real-World Decisions 2912
Further Reading 2912
Decision-Making in Financial Markets 2914
Finance 2914
Many Facets of Risk 2914
Analyzing Risky Payoffs 2914
Describing Differences between Environmental and Financial Risks 2916
Learning in a Finance Framework 2917
Predicting Changes in Prediction Risk 2917
Prediction Risk: Comparing The Kalman Filter and GARCH Models 2918
Reinforcement Learning Models for Risk Prediction as Special Cases of GARCH 2919
Neuroscience: The Finance Perspective 2919
Learning and Prediction Risk 2919
Accommodating Prediction Risk in the Rescorla-Wagner Learning Rule 2919
A Dual Role for Encoding Prediction Risk 2920
Further Reading 2921
Relevant Website 2921
Declarative Memory System: Anatomy 2922
Introduction 2922
The Amygdala, Hippocampus, and Development of an Animal Model of Human Amnesia 2923
The Entorhinal Cortex 2925
Boundaries and connections 2925
The Perirhinal and Parahippocampal Cortices 2926
Lesion studies 2926
Boundaries and connections 2927
Neuroanatomy of Declarative Memory 2928
Further Reading 2931
Decoding Neuron Transcriptome by SAGE 2932
Basics of SAGE 2932
Applying SAGE to Brain Transcriptome Studies 2933
The Total SAGE Tags Collected from the Human Brain 2933
The SAGE Tags from Normal Brains and Brains with Tumors 2933
Comparing Brain SAGE Tags to Known Transcript Sequences 2933
Mapping SAGE Tags to Human Genome Sequences 2935
Further Reading 2937
Relevant Websites 2938
Deep Brain Stimulation 2940
Clinical Applications of Deep Brain Stimulation 2940
DBS Components and Implantation 2940
Extracellular Electrical Stimulation 2940
DBS Parameter Selection 2942
Mechanisms of Action 2942
Further Reading 2943
Deep Brain Stimulation and Movement Disorder Treatment 2944
History and Development 2944
Description 2944
Indications and Targets 2944
Anatomy and Pathophysiology 2944
Mechanism of Action 2945
Operative Procedure 2946
Advantages, Disadvantages, and Alternatives 2947
Outcomes 2948
Further Reading 2948
Deep Brain Stimulation and Parkinson's Disease 2950
Introduction 2950
Methodological Aspects 2950
Selection of PD Patients for Surgical Therapy with DBS 2950
Surgical Issues 2951
Postoperative Management 2952
Results of Bilateral DBS in PD 2953
Bilateral DBS of the STN 2953
Bilateral DBS of the GPi 2955
Adverse Events 2958
Surgical and Device-Related AEs 2958
Stimulation and/or Disease-Related AEs 2958
Further Reading 2959
Delayed Reinforcement: Economics 2960
Introduction 2960
An Idealized Example 2961
Dynamic Consistency and Stationarity 2962
Dynamic Consistency 2963
Stationarity 2963
Exponential Discounting 2963
The Discount Factor 2964
The Discount Rate 2964
Beyond Exponential Discounting 2965
Intrapersonal Games 2966
Further Reading 2967
Delayed Reinforcement: Neuroscience 2968
Theoretical Bases 2968
Methodology 2971
Free-Operant Concurrent Schedules 2971
Discrete-Trials Concurrent Schedules 2971
Effects of Neurobiological Interventions on Choice of Delayed Reinforcers 2972
The 5-Hydroxytryptaminergic Pathways 2972
The Dopaminergic Pathways 2973
The Nucleus Accumbens Core 2974
The Prefrontal Cortex 2974
Future Directions 2974
Further Reading 2975
Dementia 2978
Introduction 2978
Alzheimer's Disease 2979
Vascular Dementias 2981
Frontotemporal Dementia 2981
Parkinson's Disease 2981
Psychiatric Diseases 2982
Toxic-Metabolic Encephalopathies 2982
Further Reading 2982
Relevant Websites 2983
Dementia and Language 2984
Effects of Dementia on Language 2984
Differential Effects 2985
Alzheimer's Dementia 2985
Parkinsonian Dementia 2986
Frontotemporal Dementias 2986
Primary nonfluent aphasia 2986
Semantic dementia 2987
Other dementias: vascular dementia and Lewy body disease 2987
Interactions and Interventions 2987
Implications and Conclusions 2988
Further Reading 2988
Relevant Websites 2989
Demyelinating Diseases 2990
Introduction 2990
CNS Demyelinating Diseases 2990
Multiple Sclerosis 2990
Acute Disseminated Encephalomyelitis 2992
Neuromyelitis Optica (Devic's Disease) 2993
Acute Necrotizing Hemorrhagic Encephalomyelitis 2994
Peripheral Nervous System Demyelinating Diseases 2994
Guillain-Barreacute Syndromes 2994
Chronic Inflammatory Demyelinating Neuropathy 2995
Anti-Myelin-Associated Glycoprotein Neuropathy 2996
POEMS Syndrome 2996
Further Reading 2997
Demyelination and Demyelinating Antibodies 2998
Further Reading 3000
Dendrite Development, Synapse Formation and Elimination 3002
Introduction 3002
Synaptogenesis and Synapse Maturation 3002
Features of Nascent and Mature Synapses 3002
Process of Dendritic Arbor Development 3003
Synaptic Inputs Increase Dendrite Arbor Growth 3004
Conclusion 3004
Further Reading 3005
Dendrites: Localized Translation 3006
Introduction 3006
Translational Components in Dendrites 3006
Translational Machinery 3006
Posttranslational Organelles 3006
RNAs 3006
RNA Transport in Dendrites 3006
Local Protein Synthesis in Dendrites 3007
Activity-Dependent Local Translation 3007
Mechanisms of Translational Control at the Synapse 3007
Translation initiation 3007
Translation elongation 3009
RNA level 3009
Translational Repression during Transport 3009
Perspective 3010
Further Reading 3010
Dendritic RNA Transport: Dynamic Spatio-Temporal Control of Neuronal Gene Expression 3012
Introduction 3012
Discovery of Dendritic mRNA Transport 3012
Structure and Composition of Dendritic Transport mRNPs 3012
Sequence and Structural Characteristics of Localization Signals in Neuronal Transport mRNPs 3013
Trans-Acting Factors Involved in Dendritic mRNA Transport 3014
Dynamic Regulation of Transport mRNP Motility 3014
Function of Dendritic mRNAs in Synapse Plasticity and Neuronal Polarity 3016
Dendritic mRNP Transport and Neuronal Disease 3017
Analysis of mRNA Dynamics in Living Neuronal Dendrites 3018
Further Reading 3019
Relevant Website 3019
Dendritic Signal Integration 3020
Overview: Questions 3020
Approaches 3020
Synaptic Integration in a Simple Neuron: Cerebellar Granule Cells 3020
Basic Effects of Dendrites on Synaptic Integration 3022
Effects of Inhibition on Dendritic Integration 3023
Effects of Voltage-Gated Channels on Dendritic Integration 3024
Contributions of Dendritic Spines to Dendritic Integration 3026
Concluding Remarks 3026
Further Reading 3027
Relevant Websites 3027
Dendritic Spine History 3028
Discovery 3028
Fine Structure and Proof of Synaptic Status 3028
Association with Excitatory Transmission 3029
Ideas about Dendritic Spine Function 3030
Morphological Plasticity and Cytoskeletal Structure 3030
Dendritic Spines and Cognition 3031
Further Reading 3032
Depression and the Brain 3034
Introduction 3034
Neurobiological Correlates of Mood Disorders 3034
Neural Circuits Affected by Mood Disorders 3035
Brain Structural Abnormalities 3036
Neurophysiological Imaging Abnormalities 3037
Neuropathological Correlations 3038
Correlations with Rodent Models of Chronic and Repeated Stress 3038
Neurochemical Systems Implicated in Depression 3038
Serotonergic System 3038
Catecholaminergic Systems 3039
Cholinergic System 3039
Glutamatergic and GABAergic Systems 3040
Glucocorticoid System 3040
Autonomic Nervous System Function in Mood Disorders 3041
Disturbances in Sleep Physiology 3041
Alterations of Cognitive and Emotional Processing in Mood Disorders 3041
Motor Function 3041
Early Information Processing 3041
Emotional Processing Bias 3041
Attention, Memory, and Learning 3042
Executive Function 3042
Implications for Circuit-Based Models of Depression 3042
Summary 3044
Further Reading 3044
Development of Behavior 3046
Factors That Shape the Development of Behavior 3046
Behavior Depends on the Nervous System: As the Nervous System Develops, Behavior Changes 3046
Synaptic Connections Are Established in General; Then Later They Are Refined Based on Neuronal Activity 3046
Hormones Modify Some Parts of the Developing Brain 3047
Learning Changes Behavior 3047
An Individual's Responsiveness to Specific Stimuli Varies during Development 3048
Behavior as a Window into the Developing Nervous System 3048
Motor Behaviors 3048
How Are Spontaneous Embryonic Behaviors Generated? 3049
Acquiring Complexity by Combining Behaviors 3050
Development of Behaviors That Depend on Endocrine Function and Learning 3050
One Nervous System, Very Different Lifestyles: Metamorphosis 3051
Summary 3051
Further Reading 3051
Development of Drosophila Neuromuscular Junctions 3052
Introduction 3052
General Features of the Neuromuscular Junction 3052
The Motor Neurons and Their Projections 3052
Cellular Determination and Axon Guidance 3054
Factors Regulating Motor Neuronal Identity 3054
The Decision to Defasciculate 3054
Target Selection 3055
Molecular Recognition of Synaptic Targets 3055
Synaptic Development and the Role of Activity 3056
Early Roles for Activity at the Neuromuscular Junction 3056
The Growth of the Neuromuscular Junction 3057
The Roles of Activity in Neuromuscular Junction Growth and Function 3057
Transsynaptic Signals Involved in Neuromuscular Junction Development 3058
Concluding Observations 3059
Further Reading 3059
Relevant Websites 3060
Developmental Disability and Fragile X Syndrome: Clinical Overview 3062
Introduction 3062
Genetics of FXS 3062
Physical Features 3062
Cognitive Profile 3062
The Behavioral Phenotype 3065
Fragile X Premutation: Occasional Features of FXS 3067
Summary 3068
Further Reading 3068
Developmental Synaptic Plasticity: LTP, LTD, and Synapse Formation and Elimination 3070
Activity-Dependent Maturation of Glutamate Receptor Content 3070
'Silent' Synapses Containing Only NMDA Receptors 3070
Insertion of AMPA Receptors Converts Silent Synapses into Functional Synapses, and Is a Basic Mechanism for Strengthening Synap 3070
Developmental Maturation of NMDA Receptor Subunits 3070
Changes in AMPA Receptor Subunits during Development 3072
LTP and LTD at Developing Excitatory Synapses 3072
LTP and LTD Occur Robustly at Developing Synapses 3072
Critical Periods for LTP and LTD during Development 3073
Experience Drives LTP and LTD In Vivo 3073
Other Forms of Synaptic Plasticity during Development 3074
Experience-Dependent Structural Plasticity at Developing Synapses: Synapse Formation, Elimination, and Morphological Change 3074
Developmental Changes in Morphology of Dendritic Spines 3074
Relationship between Structural Plasticity of Spines and LTP and LTD 3074
Structural Plasticity of Axonal Arbors 3075
Summary: Toward a Comprehensive Model of Functional and Structural Synapse Development 3075
Further Reading 3076
Diabetes Type 2 and Stress: Impact on Memory and the Hippocampus 3078
Introduction 3078
Memory in Aging: Normal Changes, Mild Cognitive Impairment, and Dementia 3078
Links between Diabetes and Dementia 3078
The Impact of Cortisol on Cognition and the Brain 3079
Interactions between Cortisol, Insulin Function, and Type 2 Diabetes 3080
Impact of Diabetes on the Brain 3080
Possible Mechanisms for the Cognitive Impairments Seen in T2DM 3082
Summary 3083
Further Reading 3083
Diabetic Neuropathy 3086
Clinical Overview 3086
Epidemiology 3086
Classification 3086
Somatic and autonomic peripheral nervous system manifestations 3086
Focal or multifocal neuropathic manifestations 3087
Central nervous system complications 3087
Pathophysiology 3087
Physiological Disturbances 3087
Morphological Changes 3088
Myelinated fibers 3088
Unmyelinated fibers 3089
Blood vessels 3089
Other changes 3089
Brain and spinal cord 3090
Pathogenesis 3090
Metabolic Consequences of Hyperglycemia 3090
Vascular Consequences 3091
Further Reading 3091
Relevant Websites 3091
Dichotic Listening Studies of Brain Asymmetry 3092
Dichotic Stimuli 3092
The Dichotic Test Situation 3092
DL Paradigms 3092
The Right-Ear Advantage 3092
Attentional Factors 3092
Neuroanatomical Basis 3094
Validity and Reliability 3094
Calculation of DL Scores 3095
Arousal and Activation 3095
Developmental Effects 3096
Sex Differences and Handedness Effects 3096
Clinical Populations 3096
Nonverbal Stimuli and Lateralization of Affect 3096
Further Reading 3097
Differentiation: The Cell Cycle Instead 3098
Introduction 3098
Cell Division in the Nervous System 3098
Cell Cycle and Cell Fate in the Drosophila Nervous System 3098
Cell Cycle Stage and Cell Fate 3099
Cell Cycle Genes Regulate Cell Fate and Differentiation in the Nervous System 3099
Cell Cycle Progression 3100
Cyclin-Dependent Kinase Inhibitors 3100
Cyclins and Cyclin-Dependent Kinases 3101
The Anaphase Promoting Complex 3101
The Retinoblastoma Protein 3101
The p53 Family 3102
Geminin 3102
Differentiation and Patterning Factors Regulate the Cell Cycle 3102
Conclusions 3103
Further Reading 3104
Diffusion Tensor Imaging (DTI) 3106
Introduction 3106
What Is Water Molecule Diffusion? 3106
How to Measure Diffusion by MRI? 3107
What Is Diffusion Tensor? 3109
Applications and Limitations of DTI 3113
Further Reading 3113
Dopamine 3114
Anatomy 3114
Mesencephalon 3114
Diencephalon 3114
Other Systems 3114
Function 3114
Nigrostriatal System 3114
Mesolimbic System 3115
Mesocortical System 3115
Diencephalon Systems 3116
Other Systems 3116
Life Cycle 3116
Synthesis 3116
Metabolism 3117
Transporters 3119
Regulation 3119
Firing Pattern 3119
Autoreceptors 3119
Co-localized Peptides and Proteins 3120
Extrinsic 3120
Postsynaptic Signaling 3120
Neuromodulation 3121
Volume Transmission 3121
Somatodendritic Release 3121
Long-Term Potentiation and Long-Term Depression 3121
Pyramidal Cell Dendritic Spines 3121
Further Reading 3122
Dopamine - CNS Pathways and Neurophysiology 3124
Introduction 3124
Anatomy of DA Neuron Projections 3124
Electrophysiology 3124
Identification 3124
Passive Membrane Properties 3124
DA Neuron Activity States 3125
Irregular, Single-Spike Firing 3125
Burst Firing 3125
Electrical Coupling 3126
Afferent Input to Midbrain DA Neurons 3127
Intrinsic Regulation of DA Neuron Firing 3127
Autoreceptor-Mediated Inhibition 3127
GABA 3127
Afferent Connectivity 3127
GABAergic Inputs 3127
Glutamatergic Inputs 3127
Association between GABA and Glutamatergic Inputs 3128
Regulatory Inputs 3128
Neuromodulatory Inputs 3129
Cannabinoids 3129
Orexin 3129
Conclusion 3129
Further Reading 3129
Dopamine Control of Arousal 3132
Introduction 3132
Sleep Regulation: Wake-Active Dopamine Neurons 3132
Dopaminergic Disorders and Sleep: PD 3134
Dopamine and Stimulant-Induced Arousal 3135
Summary 3136
Further Reading 3136
Dopamine in Perspective 3138
DA Synthesis and Catabolism 3138
DA Biochemistry: History 3138
DA Function in the CNS: History 3140
Functional Significance of CNS DA 3143
Further Reading 3145
Dopamine Neurons: Reward and Uncertainty 3146
Introduction 3146
Behavioral Theories of Reward and Uncertainty 3146
Learning 3146
Approach Behavior and Decision Making 3147
Quantification of Reward Value and Uncertainty 3147
Pleasure 3147
Motivational Valence 3147
Reward Signals in Dopamine Neurons 3148
Reward Prediction Error 3148
Reward-Predicting Stimuli 3149
Uncertainty Signal in Dopamine Neurons 3150
Comparisons with Other Reward Centers 3150
Orbitofrontal Cortex 3150
Pure Reward Signals in Striatum and Nucleus Accumbens 3151
Reward Influences on Action-Related Activity in Striatum 3151
Prefrontal Cortex 3151
Other Cortical Areas 3151
Amygdala 3152
Further Reading 3152
Dopamine Receptors and Antipsychotic Drugs in Health and Disease 3154
Introduction 3154
Early Days: Before Discovery of Dopamine Receptors 3154
Therapeutic Concentrations of Antipsychotics 3154
In Vivo Experiments 3154
The Dopamine D1 Receptor 3155
Discovery of the Antipsychotic Dopamine Receptor, or the Dopamine D2 Receptor 3155
Two Classes of Dopamine Receptors 3157
Nomenclature of Dopamine Receptors 3160
Dopamine D2 Receptor Variants 3161
D2 Function and Distribution 3161
The Dopamine D3 Receptor 3162
The Dopamine D4 Receptor 3162
The Dopamine D5 Receptor 3164
Regulation of Dopamine Receptors 3164
D2 Interactions with Other Receptors 3167
Psychosis and the D2High Basis of Dopamine Supersensitivity 3167
Current Clinical and Basic Research on Dopamine Receptors 3170
Further Reading 3171
Dopamine: Cellular Actions 3172
Dopamine Actions in the Frontal Cortex 3172
Dopamine Actions in the Ventral and Dorsal Striatum 3173
Dopamine Actions in the Ventral Mesencephalon 3174
Conclusions 3174
Further Reading 3174
Dopaminergic Agonists and l-DOPA 3176
Pharmacological Treatment of Parkinson's Disease 3176
l-DOPA in PD 3176
L-DOPA and l-DOPA-Sensitive Dystonia 3178
Dopaminergic Agonists 3178
Ergoline Derivatives 3179
Non-Ergoline Derivatives 3180
Side Effects 3180
Conclusion 3181
Further Reading 3181
Relevant Websites 3182
Dopaminergic Differentiation 3184
Introduction 3184
Overview: The Medical Importance of DA Neuron Development 3184
Extrinsic Factors in Mesencephalic DA Neuron Development 3184
Intrinsic Factors in Mesencephalic DA Neuron Development 3185
Development of Distinct Subtypes of Mesencephalic DA Neurons 3186
The Control of DA Axonal Development 3186
DA Neuron Differentiation In Vitro 3187
Conclusion 3187
Further Reading 3188
Dorsal Root Ganglion Neurons 3190
Introduction 3190
Expression of Multiple Ion Channel Subtypes 3190
Excitability of Injured DRG Neurons 3191
Inflammatory Pain 3192
Demyelination and Multiple Sclerosis 3192
Ion Channel Mutations Associated with DRG 3192
Modulation of Excitability by Cofactors and Phosphorylation 3193
Conclusions 3194
Further Reading 3194
Relevant Website 3194
Double Cortex 3196
Introduction 3196
Genetic Bases 3196
Imaging Studies 3196
Neuropathology 3198
Clinical Aspects 3198
Pathophysiology 3199
Further Reading 3201
Down Syndrome 3202
Introduction 3202
History 3202
Epidemiology 3203
Clinical Features 3204
Etiology 3204
Neurobiological Bases for Nervous System Dysfunction in Down Syndrome 3205
Human Studies 3205
Synaptic structure and function 3205
Basal forebrain cholinergic neurons 3205
Mouse Models of Down Syndrome: Defining Nervous System Abnormalities 3205
Mice Trisomic for Mouse Orthologs of HSA21 3206
Ts16 and Ts65Dn mice 3206
Ts1Cje and Ms1Ts65 mice 3207
Ts1Rhr and Ms1Rhr mice 3207
Mice Trisomic for HSA21 3207
Mice Transgenic for Individual Genes 3207
Defining and Characterizing Nervous System Abnormalities in Mouse Models of Down Syndrome 3207
Synaptic Structure and Function 3207
Basal Forebrain Cholinergic Neurons 3208
Hippocampal Functions 3208
Cerebellum 3208
Basis of DS Therapy 3208
Further Reading 3208
Down Syndrome: A Disorder of Histogenesis 3210
Introduction 3210
Ts16 3210
Ts65Dn 3211
Basal Forebrain Deficits 3212
Apoptosis in DS 3212
Ts1Cje and Ms1Cje Mouse Models of DS 3212
Further Reading 3213
Dream Function 3214
Introduction 3214
Contrasting Conceptions of 'Function' 3214
Dream Carryover Effects 3214
Carryover Effects of REM Dreaming 3214
Fluidity of thought 3215
Felt presence 3215
Felt position 3215
Emotional feeling 3215
Auxiliary effects 3215
Carryover Effects of Intensified Dreaming 3215
Sleep paralysis episodes 3215
Impactful dreams 3216
Memory Consolidation 3216
Memory Consolidation and REM Sleep 3216
Effects of learning on REM sleep 3216
Effects of REM deprivation on consolidation 3216
Convergent findings from other paradigms 3217
Memory Consolidation and NREM Sleep 3217
Dream Content and Memory Consolidation 3217
Emotional Adaptation 3218
Mood Regulation 3218
REM sleep and mood regulation during depression 3218
REM deprivation and depression 3218
Conflict Resolution 3219
Vestigial Defense 3219
Conclusion 3219
Further Reading 3220
Dreams and Dreaming: Incorporation of Waking Events 3222
Overview 3222
Effects of Presleep Experience on Dream Content 3222
Manipulation of Presleep Experience in the Sleep Laboratory 3222
Correspondence between Presleep Experience and Dreaming in the Home 3223
Incorporation of Presleep Experience into Sleep Onset Dreaming 3223
Form of Waking Experience Incorporations 3224
Sleep Stages, Waking Memory Sources, and Memory Systems 3225
Emotional Value and Waking Experience Incorporation 3225
Time Course of Incorporations 3226
Recent Memories, Dreaming, and Memory Consolidation 3226
Neural Basis for Dream Incorporation of Recent Events: Connection to Declarative Memory Consolidation? 3227
A Function for Dreaming? 3228
Further Reading 3228
Dreams and Nightmares in PTSD 3230
Clinical Significance of Nightmares in Posttraumatic Stress Disorder 3230
Nightmares and Sleep following Trauma Exposure and in Chronic PTSD 3230
Dream Recall and Nightmare-Related PTSD 3230
Repetition of Trauma in Dreams 3231
Trauma and Dream Content 3231
Victims of Physical and Sexual Abuse 3231
Victims of War and Violence 3231
Frequency of Dream-Related Disorders 3232
Functional Hypotheses of PTSD-Related Nightmares 3232
Nightmares and Emotional Adaptation to Trauma 3232
Sensitization Hypothesis of PTSD Nightmares 3232
Potential Psychophysiological and Neurobiological Underpinnings of PTSD-Related Nightmares 3233
Treatments of PTSD-Related Nightmares 3234
Imagery Rescripting and Rehearsal 3234
Prazosin 3235
Serotonin-Potentiating Drugs 3235
Other Pharmacological Agents 3235
Further Reading 3236
Relevant Websites 3236
Dreams, Dreaming Theories and Correlates of Nightmares 3238
Nightmares Defined 3238
Nightmare Prevalence and Correlates 3238
Models of Nightmare Production 3239
Psychoanalytic and Neopsychoanalytic Models 3239
Personality and Evolutionary Models 3239
Boundary permeability 3239
Image contextualization 3240
Threat simulation 3240
Neurobiological Models 3241
Neurotransmitter imbalance 3241
REM sleep desomatization 3241
Mood regulation 3242
Affective network dysfunction 3242
Further Reading 3244
Drosophila Apterous Neurons: From Stem Cell to Unique Neuron 3246
Introduction 3246
The Apterous Neurons of the Drosophila Ventral Nerve Cord 3246
Genetic Mechanisms of Apterous Neuron Specification 3246
The Apterous Cluster Is Generated by the Stem Cell Neuroblast 5-6T 3247
Remodeling of Apterous Tv Neurons during the Pupal-to-Adult Transition 3248
Important Themes during Neuronal Subtype Specification 3248
Combinatorial Coding versus Master Regulators 3249
Feed-Forward Loops 3249
Target-Derived Instructive Signals 3249
Remodeling 3249
Conclusion 3249
Further Reading 3250
Drug Addiction: Behavioral Neurophysiology 3252
Introduction 3252
Anatomy of the Nucleus Accumbens: A Key Neural Substrate in Addiction 3252
Neurophysiological Investigations of Drug Addiction: Overview 3253
Nucleus Accumbens Cell Firing during Cocaine Self-Administration 3253
Role of Drug Abstinence on Accumbens Cell Firing during Cocaine Seeking 3254
Distinct Populations of Nucleus Accumbens Neurons Selectively Encode Goal-Directed Behaviors for Drug versus 'Natural' 3255
Insights into the Functional Organization of the Nucleus Accumbens 3255
Neurophysiological Investigations during Self-Administration of Other Abused Substances 3255
Behavioral Electrophysiology of the PFC and BLA 3256
Concluding Remarks 3256
Further Reading 3256
Relevant Website 3257
Drug Addiction: Behavioral Pharmacology of Drug Addiction in Rats 3258
Introduction 3258
Environmental Modulation of the Behavioral Effects of Addictive Drugs 3258
Environmental Modulation of Immediate-Early Gene Expression 3259
Striatum 3260
Amygdala 3261
Neocortex 3262
Environmental Modulation of Drug-Induced Structural Neuroplasticity 3262
Conclusions 3264
Further Reading 3265
Drug Addiction: Cellular Mechanisms 3266
Addiction and Synaptic Plasticity 3266
Glutamate Receptors as Targets for Addictive Drugs 3266
Long-Term Potentiation: A Cellular Substrate for Abnormal Learning and Memory Processes 3266
Drug-Induced Synaptic Plasticity and VTA Dopaminergic Cell Activity 3268
Addiction and Ion Channels 3268
Calcium Channel Modulation of Addictive Behaviors 3269
Modulation of Drug Reinforcement by Other Ion Channels 3270
Changes in Ion Channel Function after Chronic Drug Exposure 3271
Conclusions and Future Directions 3271
Further Reading 3272
Drug Addiction: Neuroimaging 3274
Introduction 3274
Major Brain Circuits and Neurotransmitters Studied in Drug Addiction 3274
Major Neuroimaging Findings in Human Drug Addiction 3275
Association of Brain Imaging with the Core Clinical Drug Addiction Characteristics 3277
Brain Imaging of Acute Pharmacological and Nonpharmacological Effects 3277
Intoxication 3277
Craving 3280
Bingeing 3280
Withdrawal 3282
Chronic Effects and Other Issues 3282
Chronic drug effects 3282
Neurotoxicity 3283
Effects of exposure to drugs in utero 3285
Imaging predisposition and vulnerability 3285
Summary 3286
Further Reading 3286
Drugs Addiction: Actions 3288
Introduction 3288
Psychomotor Stimulants 3288
Opiates 3289
Nicotine 3289
Alcohol 3289
Benzodiazepines and Barbiturates 3290
Addictive Consequences 3290
Further Reading 3291
d-Serine: From Its Synthesis in Glial Cell to Its Action on Synaptic Transmission and Plasticity 3292
Introduction 3292
Localization of d-Serine 3293
Synthesis and Degradation of d-Serine 3293
Release of d-Serine 3294
d-Serine Clearance 3295
d-Serine Contribution to Synaptic Transmission and Plasticity 3295
Conclusion 3297
Further Reading 3297
Dynamin 3300
Introduction 3300
Dynamin Superfamily 3300
Dynamin Domains 3300
GTPase domain 3300
Middle domain and GTPase effector domain 3301
Pleckstrin-homology domain 3301
Proline-rich domain 3301
Dynamin Mediates Endocytosis 3302
Dynamin in Flies 3302
Mammalian Classic Dynamins 3302
Function of Other Superfamily Members 3302
Dynamin-related proteins 3302
Guanylate-binding proteins/atlastins 3303
Mechanisms of Dynamin-Mediated Membrane Fission 3304
Role of Unassembled Dynamin Early in Endocytosis 3304
Ring Assembly on Lipid Templates 3304
Helical Tension and Twist Produce Fission 3304
Dynamin Recruitment to Sites of Endocytosis 3305
Regulation of Dynamin 1 Function 3305
Dynamin and Synaptic Transmission 3308
Dynamin Inhibitors 3308
Dynamin and Disease 3308
Further Reading 3310
Dysautonomia: Familial 3312
Clinical Phenotype 3312
Diagnosis 3312
Pathology 3312
Biochemical Abnormalities 3313
Genetics 3313
IKAP Function 3313
Treatment of FD 3314
Summary 3315
Further Reading 3315
Dyslexia: Neurodevelopmental Basis 3316
Introduction 3316
Behavioral Profile of Developmental Dyslexia 3316
Definition of Developmental Dyslexia 3316
Cognitive Characteristics of Developmental Dyslexia 3317
Sensorimotor Characteristics of Developmental Dyslexia 3317
Biological Basis of Developmental Dyslexia 3318
Brain-Based Evidence 3318
Genetic Evidence 3319
Dyslexia in Different Languages and Orthographies 3319
Comorbid Disorders 3320
Developmental Dyslexia and Attention-Deficit/Hyperactivity Disorder 3320
Developmental Dyslexia and SLI 3320
Therapeutic Approaches to Developmental Dyslexia 3320
Summary 3321
Further Reading 3322
Relevant Website 3322
Dystonia: Classification, Genetics and Therapeutics 3324
Introduction 3324
Classification of Dystonia 3324
Classification Based on Cause 3324
Classification Based on Affected Body Regions 3324
Focal dystonias 3324
Dystonia-plus syndrome 3326
Classification Based on Age of Onset 3327
Early onset generalized dystonia 3327
Dopa-responsive dystonia 3327
Pathophysiology of Dystonia 3327
Imaging Studies in Dystonia 3327
Genetics of Dystonia 3328
Therapy 3329
Medications 3329
Dopaminergics 3329
Anticholinergics 3329
Benzodiazepines 3329
Baclofen 3329
Botox Treatment 3329
Surgical Treatment 3330
Deep Brain Stimulation 3330
Other Therapies 3330
Molecular Approaches 3330
Further Reading 3330
Dystonia: Myoclonus-Dystonia 3332
Definition, Terminology, and Diagnostic Criteria of Myoclonus-Dystonia 3332
Definition 3332
Terminology 3332
Diagnostic Criteria 3332
Clinical Features of M-D 3333
Clinical Features of M-D Patients with Documented SGCE Mutations 3334
Differential Diagnosis 3334
Genetic Findings in M-D 3335
Reduced Penetrance Due to Imprinting of the SGCE Gene 3335
Mutational Screening of the SGCE Gene 3335
Frequency of SGCE mutations in tested patient samples 3335
Types and localization of SGCE mutations 3336
Sarcoglycan Genes and SGCE Protein 3336
Genetic Heterogeneity of M-D 3336
Phenotype-Genotype Correlations 3342
Animal Models 3342
Diagnostic and Ancillary Tests 3344
DNA Tests 3344
Other Laboratory Tests 3344
Neuroimaging 3344
Treatment 3344
Further Reading 3344
Relevant Websites 3345
Dystrophin, Associated Proteins, and Muscular Dystrophy 3346
Duchenne Muscular Dystrophy: Clinical Features, Pathology 3346
Dystrophin: Identification, Features of Gene and Protein 3346
Autosomal Limb-Girdle Muscular Dystrophies 3349
Congenital Muscular Dystrophy 3349
The Dystrophin-Associated Complex 3349
The DAG Complex: A Functional Model 3350
Glycosylation-Dependent Muscular Dystrophies; Muscular Dystrophies with CNS Involvement 3353
Dysferlin: Sarcolemmal Repair Mechanism 3353
Dystrophin and Dystrophin-Associated Proteins in the Central and Peripheral Nervous Systems 3354
Dystrophin Isoforms 3355
The DAG Complex in Peripheral Nerve 3356
Dystrophin and Animal Models of Muscular Dystrophy 3356
Mouse Models 3356
Mouse models of DAG complex mutations 3357
Dystrophin-Deficient Feline; Lethal Muscle Hypertrophy 3357
Dystrophin and Muscular Dystrophy in Dogs 3357
Dystrophin and DAG in Zebra Fish 3357
Dystrophin and DAG in Drosophila 3357
Dystrophin and Muscular Dystrophy in C. elegans 3358
Conclusion 3358
Further Reading 3358
Relevant Websites 3359
E 3360
Eating Disorders 3360
Introduction 3360
Description 3360
Core Symptoms 3360
Familial/Genetic 3361
Pathophysiology 3362
Treatment 3363
Bulimia Nervosa 3363
Anorexia Nervosa 3363
Summary 3364
Further Reading 3364
Relevant Websites 3364
Echolocation I: Behavior 3366
Echolocation Sounds and Foraging Niches 3366
Search Phase Sounds and Detection 3366
Pursuit and Capture 3369
Long CF/FM Bats and Doppler-Shift Compensation 3370
Laboratory Studies of the Limits of Echolocation Skills 3371
Detection 3371
Range (Distance) Discrimination 3371
Time-Intensity Trading, Middle-Ear Muscles, and Echo 'Gain Control' 3371
Fine Temporal Resolution/Range Jitter Discrimination 3372
'Glints,' Multiple-Wave Front Resolution, and Target Discrimination 3372
Angular Resolution in the Horizontal and Vertical Dimensions 3373
Echolocation by Other Animals 3375
Further Reading 3375
Echolocation II: Neurophysiology 3376
Introduction 3376
Properties of Biosonar Signals 3376
The Auditory System of CF-FM Bats 3378
Subcortical Specialization 3378
Cortical Specialization 3380
The Auditory System of FM Bats 3384
Signal Processing for Sound Localization 3385
Protection of Biosonar Information Processing from Jamming by Biosonar Pulses of Conspecifics 3386
Corticofugal Feedback for Auditory Signal Processing 3386
Further Reading 3386
Electrical Perception and Communication 3388
Introduction 3388
Electric Fishes 3388
Occurrence of Electroreceptors 3388
The Signaling Environment and Signal Transmission 3388
Advantages of Electric Communication 3388
Dual Functions 3388
Electric Signal Production and Signal Transmission 3388
Electric Organs 3388
The Nature of Electric Signals 3391
Signal Transmission: The Geometry of Electric Fields in a Volume Conductor 3392
Active Space 3393
The Economy of Impedance Matching 3393
Nonpropagated Signals 3395
Noise 3395
Signal Reception 3395
Ampullary Electroreceptors 3396
Tuberous Electroreceptors 3397
Temporal Dimensions of Social Communication Signals 3397
Tonic Signals in Electric Communication 3397
Phasic Signals 3403
Jamming Avoidance Responses (JAR) 3404
Brain Mechanisms of Signal Generation 3405
Further Reading 3406
Relevant Websites 3406
Electrical Self-Stimulation 3408
Introduction 3408
Multiple Reward Sites 3408
Role of Monoamines 3408
Fast Descending Reward-Relevant Fibers in the Medial Forebrain Bundle 3409
Second-Stage and Third-Stage Candidates 3410
Interaction with Addictive Drugs 3411
Electrical Self-Stimulation in Perspective 3411
Further Reading 3411
Electrocommunication 3414
Electric Organs and Electroreceptors 3414
Patterns of Electric Organ Discharges 3414
Sexual Dimorphisms in the Electric Organ Discharge 3415
Species Recognition 3416
Electrocommunication 3417
Wave-Type Weakly Electric Fish 3417
Pulse-Type Weakly Electric Fish 3419
Neural Control of Chirping Behavior 3421
Further Reading 3422
Electroencephalography (EEG) 3424
Definitions 3424
Neuronal Sources of the EEG/MEG 3424
EEG Rhythms: Phenomenology and Functional Significance 3424
EEG Signals in Vigilance and Sleep Stages 3426
Spatial Resolution of EEG 3427
The Combined Recording of EEG and fMRI 3427
Toward a New Era of Dynamical Brain Imaging 3428
Further Reading 3430
e9780080446172v4 3765
Front Cover 3765
Encyclopedia of Neuroscience 3766
Copyright Page 3769
Foreword 3782
Preface 3784
Senior Editors 3770
Associate Editors 3772
Table of Contents 3776
Volume 4 3786
E 3786
Estrus and Menstrual Cycles: Neuroendocrine Control 3786
Introduction 3786
The Ovarian Cycle 3786
Overview 3786
GnRH Neurons: The Central Neural Regulators 3786
Follicular Phase and Ovulation 3787
Luteal Phase 3788
External Environmental Factors Influencing Ovarian Cyclicity: Energy Balance 3788
Further Reading 3790
Event-Related Potentials (ERPs) 3792
Event-Related Potentials 3792
Memory Encoding 3792
ERPs and Retrieval 3793
Recognition Memory 3793
Other ERP Old/New Effects 3795
ERP Studies of Recall 3795
Neural Generators of ERP Retrieval Effects 3797
Concluding Comments 3797
Further Reading 3797
Event-Related Potentials (ERPs) and Cognitive Processing 3798
Origins of Event-Related Potentials 3798
Selective Attention 3799
Stimulus Discrimination and Classification 3801
Memory Processes 3802
Language Processing 3802
Further Reading 3803
Evoked Potentials: Clinical 3804
Introduction 3804
Visual Evoked Potentials 3804
Nonpathological Factors Affecting VEPs 3805
Pathologic Changes Affecting the VEP 3805
Somatosensory Evoked Potentials 3805
Upper Limb SEPs 3805
Lower Limb SEPs 3806
Nonpathological Factors Affecting SEPs 3807
Pathological Changes in SEPs 3807
Brain Stem Auditory Evoked Potentials 3807
Clinically Relevant Changes in BAEPs 3808
Pathological Changes in BAEPs 3808
Event-Related Potentials (P3) 3808
Nonpathologic Factors Affecting the P3 3809
Pathologic Factors Affecting the P3 3810
Motor Evoked Potentials 3810
Methodology 3810
Nonpathological Changes in MEPs 3810
Pathological Changes in MEPs 3811
Other Uses of TMS 3811
Premotor Potentials 3811
Generators 3811
Nonpathological Changes in Premotor Potentials 3811
Pathological Changes in Premotor Potentials 3811
Intraoperative Neurophysiologic Monitoring 3813
Further Reading 3813
Evoked Potentials: Recording Methods 3814
Introduction 3814
Analysis in the Time Domain 3814
Time-Domain Averaging of Transient Evoked Responses 3814
Quantification of the Transient Evoked Response Waveform 3814
Analysis in the Frequency Domain 3815
Fourier Analysis of the Steady-State Evoked Response 3815
Frequency Tagging of Multiple Stimulus Locations, Submodalities, and Modalities 3818
The Sweep Technique 3819
Evoked Response Feedback 3819
Analysis of Nonlinear Sensory Systems 3819
The Two-Frequency Method 3819
The White Noise and Related Methods 3822
Further Reading 3822
Evolution of Sensory Receptor Specializations inthe Glabrous Skin 3824
Introduction 3824
Types of Cutaneous Receptors 3824
Free Nerve Endings 3824
The Merkel Cell System 3825
The Meissner Corpuscle 3825
Pacinian Corpuscle 3826
Ruffini Corpuscle 3827
Evolution of Cutaneous Receptors 3827
Further Reading 3827
Evolution of the Limbic System 3828
Introduction 3828
Mammals 3828
Sensory Projections to the Telencephalon 3828
Hippocampus and Cortex 3829
Amygdalar Complex and Claustrum-Endopiriform Area 3829
Reptiles 3832
Sensory Pathways to the Telencephalon 3832
Hippocampus and Cortex 3832
Amygdalar Nuclei and Pallial Thickening 3834
Birds 3835
Sensory Pathways to the Telencephalon 3835
Hippocampus and Cortex 3836
Amygdalar Nuclei and Mesopallium 3836
Amphibians 3836
Sensory Pathways to the Telencephalon 3836
Hippocampus and Cortex 3837
Amygdalar Nuclei 3837
Fish 3838
Sensory Pathways to the Telencephalon 3838
Hippocampus and Cortex 3839
Amygdalar Areas 3839
Further Reading 3840
Evolution of Vertebrate Brains 3842
Introduction and Overview 3842
Evolution of the Brain in Ancestral Vertebrates 3844
Type I Brains 3846
Lampreys 3846
Type I Cartilaginous Fishes 3846
Type I Ray-Finned Fishes 3847
Lungfishes, Crossopterygian, and Amphibians 3847
Type II Brains 3848
Hagfishes 3848
Type II Cartilaginous Fishes 3848
Teleosts 3848
Amniotes 3849
Mammals 3849
Sauropsids 3849
Forebrain evolution across amniotes 3850
Further Reading 3851
Evolution of Vertebrate Respiratory Control 3852
Introduction 3852
Evolution of Rhythm Generation 3852
Evolution of Gill Ventilation: From Tunicate to Fish 3852
Gill Ventilation in the Amphibian Tadpole 3853
Origins of Air Breathing 3855
The Air-Breathing Rhythm Generator in Amphibians 3855
The Air-Breathing Rhythm Generator in Mammals 3856
Evolution of Chemoreceptors 3856
Why Chemoreceptors? 3856
Peripheral Respiratory Chemoreceptors in Fish 3857
Peripheral Respiratory Chemoreceptors in Tetrapods 3857
Central CO2 Chemoreceptors in Air-Breathing Vertebrates 3858
Other Chemoreceptors: Upper Airways and Lung Epithelial Bodies 3860
Other Reflexes 3860
Summary and Conclusions 3860
Further Reading 3860
Excitotoxicity in Neurodegenerative Disease 3862
Introduction to the Excitotoxic Theory of Neurotoxicity 3862
Clinical Relevance of Excitatory Amino Acid Neurotoxicity 3862
Hypoxia/Ischemia 3862
Epilepsy 3863
Traumatic Brain Injury 3863
Neurodegenerative Diseases 3864
Parkinson's disease 3864
Huntington's disease 3864
Alzheimer's disease 3864
Intoxication with Exogenous Excitatory Amino Acids 3865
Implication of Distinct Glutamate Receptor Classes in Excitotoxicity 3865
Ionic Dependence of Excitotoxic Cell Damage 3866
Mitochondrial Dysfunction 3867
Role of Reactive Oxygen Species in Excitotoxicity 3868
Role of Nitric Oxide and Other Reactive Nitrogen Species in Excitotoxicity 3869
NMDA Receptors on Glial Cells 3870
Therapeutic Implications and Future Directions 3870
Further Reading 3871
Executive Function and Higher-Order Cognition: Assessment in Animals 3872
General Issues for Animal Testing 3872
Taxonomy of Cognition 3872
Methods to Study Perception 3872
Discrimination and Categorization 3872
Awareness 3873
Methods to Study Attention 3873
Methods to Study Memory 3873
Short-Term Working Memory 3873
Long-Term Memory 3874
Methods to Study Response Selection and Preparation 3874
Response Selection 3874
Response Preparation 3875
Intention 3875
Methods to Study Emotion 3876
Methods to Study Executive Control 3876
Decision Making 3876
Problem Solving and Tool Use 3877
Communication 3877
Further Reading 3877
Executive Function and Higher-Order Cognition: Computational Models 3878
Introduction 3878
Prefrontal Cortex and Control 3878
Active Goal Maintenance 3878
Biased Competition 3879
Anterior Cingulate Cortex and Performance Monitoring 3880
Conflict Theory 3880
Neuroanatomy 3881
Conflict and Errors 3881
Time Course of Executive Control 3881
Multiple Kinds of Control 3882
Basal Ganglia and Action Selection 3882
Production System Models 3883
Further Reading 3883
Executive Function and Higher-Order Cognition: Definition and Neural Substrates 3884
The Prefrontal Cortex 3884
PFC Contributions to Executive Control 3885
Inhibition 3885
Planning 3886
Evaluating Consequences 3886
Working Memory 3886
Learning and Using Rules 3887
Neurobiological Models of Executive Control 3888
Summary 3889
Further Reading 3889
Executive Function and Higher-Order Cognition: EEG Studies 3890
Introduction 3890
Selective Attention 3890
Novelty and Deviance Detection and Involuntary Attention Shift 3891
Monitoring 3892
Conclusion 3893
Further Reading 3894
Executive Function and Higher-Order Cognition: Neuroimaging 3896
Executive Function 3896
Probing Executive Function with Neuroimaging Techniques 3896
Tasks Used to Study Executive Function 3896
Selective Attention 3896
Response Inhibition 3898
Task-Set Representation 3900
Current and Future Directions 3900
Combined fMRI and EEG Methodology 3900
Event-Related Optical Signals 3901
Further Reading 3901
Executive Functions: Eye Movements and Neuropsychiatric Disorders 3902
What Are Executive Functions? 3902
Eye Movements and Executive Functions 3902
Classes of Eye Movements 3902
Eye Movements in Human Disorders 3904
Neurological 3904
Developmental 3905
Psychiatric 3905
Eye Movement Deficits in Schizophrenia 3905
What Is Schizophrenia? 3905
Eye Movement Deficits 3905
Biological Basis of Eye Movement Deficits 3906
Genetics of Eye Movement Deficits 3906
Importance of Subtypes and Genetics for Outcome 3906
Further Reading 3907
Exercise in Neurodegenerative Disease and Stroke 3908
Introduction 3908
PD 3908
The Condition 3908
Clinical Evidence for the Beneficial Effects of Exercise in PD 3908
Animal Studies 3909
AD 3910
The Condition 3910
Clinical Findings on Efficacy of Exercise in AD 3910
Animal Studies 3911
Stroke 3911
Exercise 3911
Animal Studies 3912
How Might Exercise Work? 3913
Exercise Regulates Trophic Factors 3914
Summary and Conclusions 3915
Further Reading 3915
Exercise: Optimizing Function and Survival at the Cellular Level 3918
Introduction 3918
Exercise and Central Nervous System Activation: Neurotransmitter Function 3918
Exercise and Growth Factor Expression 3919
Exercise and Cellular Survival Signaling 3921
Neurodegeneration: How Exercise Can Decrease Risk and Contribute to CNS Repair Mechanisms 3922
Conclusion 3922
Further Reading 3923
Exocytosis: Ca2+-Sensitivity 3924
Introduction 3924
The Microdomain Ca2+ Signal 3924
The Ca2+ Uncaging Experiment 3924
Ca2+-Dependent Rates of Exocytosis in Secretory Cells and Nerve Terminals 3924
The Ca2+ Sensitivity of Transmitter Release at the Calyx of Held 3926
Molecular Determinants for Different Ca2+ Sensitivities of Vesicle Fusion 3928
Ca2+ Cooperativity in Vesicle Fusion 3928
Further Reading 3929
Extinction: Anatomy 3930
Introduction 3930
Amygdala 3930
Medial Prefrontal Cortex 3930
Hippocampus 3932
Periaqueductal Gray and Error Signaling 3932
Anatomy of Extinction in Humans 3933
Further Reading 3933
Extracellular Matrix Molecules: Synaptic Plasticity and Learning 3934
Introduction 3934
Integrins and Synaptic Plasticity 3934
Integrins and Learning and Memory 3935
Reelin and Induction of NMDA Receptor- Dependent LTP 3936
Reelin and Learning and Memory 3936
Tenascin-C and Induction of Synaptic Plasticity via Ca2+ Channels 3936
TN-C and Learning and Memory 3937
TN-R, GABAergic Transmission, and Metaplasticity 3937
TN-R and Learning and Memory 3938
Tenascins and Neural Circuitries 3938
Plastic and Cognitive Functions of Chondroitin Sulfate Proteoglycans 3938
Activity-Dependent Remodeling of the ECM 3939
Conclusions and Future Directions 3940
Further Reading 3941
Relevant Website 3941
Eye and Head Movements 3942
Interactions between the Vestibulo- Ocular Reflex and Voluntary Eye Movements 3942
The Control of Eye-Head Gaze Shifts 3942
Behavioral Investigations 3942
Neurophysiology: Premotor Control of the Eye during Gaze Shifts 3943
Brain stem saccadic pathway 3943
Vestibulo-ocular reflex pathways 3944
Extraocular motor neurons 3946
Neurophysiology: Premotor Control of the Head during Gaze Shifts 3946
Integrated Feedback Control of Eye-Head Gaze Shifts and Implications for Upstream Control 3947
The Control of Eye-Head Pursuit 3949
Behavioral Investigations 3949
Neurophysiology: Premotor Control of the Eye during Eye-Head Pursuit 3949
Brain stem pursuit pathways 3949
Vestibulo-ocular reflex pathways 3950
Premotor inputs to the extraocular motor neurons 3950
Neurophysiology: Premotor Control of the Head during Eye-Head Pursuit 3951
Upstream Control 3951
Conclusion 3951
Further Reading 3951
Eye Movement Disorders 3954
Introduction 3954
Disorders of the Ocular Motor Periphery 3954
Disorders Affecting the Brain Stem Contributions to Gaze Control - the Pons 3954
Disorders Affecting the Brain Stem Contributions to Gaze Control - the Midbrain 3955
Disorders Affecting the Cerebellar Contributions to Gaze Control 3956
Disorders of the Basal Ganglia That Cause Disordered Gaze Control 3958
Disorders of the Cerebral Cortex That Affect Gaze Control 3958
Pathological Nystagmus and Saccadic Intrusions 3958
Nystagmus Due to Peripheral or Central Imbalance 3960
Nystagmus Due to Disturbance of the Neural Integrator for Eye Movements 3960
Nystagmus Occurring with Disorders of the Visual Pathways 3961
Saccadic Intrusions and Oscillations 3962
Conclusions 3962
Further Reading 3962
Eye Tracking and Mental Illness 3964
Quantitative Characterization of Eye- Tracking Dysfunction 3964
Specificity 3965
Psychotropic Medications 3965
Genetic Studies - Familial Aggregation, Twin Studies, and Linkage Studies 3966
Pathophysiology 3967
Brain Imaging 3967
Oculomotor Paradigms 3967
Psychophysical Methods 3968
Further Reading 3968
Eyeblink Conditioning 3970
Classical Conditioning of the Eyeblink Response 3970
The Nature of the Eyeblink Unconditioned and Conditioned Responses 3970
Brain Systems Involved in Eyeblink Conditioning 3970
Cerebellar System: The Pathways 3971
The UR Pathways 3971
The CR Pathway 3971
The CS Pathway 3972
The US Pathway 3972
Conjoint Activation of CS and US Pathways 3972
The Cerebellar System: Interpositus Nucleus 3972
Lesions 3972
Recordings 3973
Cerebellar System: Reversible Inactivation 3973
Cerebellar System: Cerebellar Cortex 3973
Lesions 3974
Inactivation 3974
Complete Cortical Elimination 3974
Recordings 3975
Mechanisms of Memory Storage in the Interpositus 3975
Mechanisms of Memory Storage in the Cerebellar Cortex 3975
Conclusion 3976
Further Reading 3976
F 3978
Facial Expression in Primate Communication 3978
Faces Are Salient Social Stimuli 3978
Static Faces 3978
Individual Identity 3978
Face Expertise 3979
Studies of Face Expertise in Primates 3979
Faces as Dynamic Signals 3980
Ritualization and Signal Form 3980
The Social Meaning of Graded and Blended Signals 3981
Deconstructing Facial Expressions into Component Movements 3983
Conclusion 3984
Further Reading 3984
Relevant Website 3985
Fatigue 3986
Introduction 3986
Sites of Impairment 3986
Task Dependency 3989
Task Failure 3989
Further Reading 3991
Fear Conditioning and Synaptic Plasticity 3992
Introduction 3992
Pavlovian Fear Conditioning 3992
Anatomical Basis of Conditioned Fear 3992
Molecular Mechanisms of Conditioned Fear 3992
Molecular Fingerprint of Synaptic Plasticity 3992
Glutamate Receptors 3993
Brain-Derived Neurotrophic Factor 3995
Signaling Pathways 3995
Transcription 3996
Translation 3996
Direct Measures of Synaptic Plasticity during Conditioned Fear 3996
Summary and Conclusions 3997
Further Reading 3997
e9780080446172v5 5017
Front Cover 5017
Encyclopedia of Neuroscience 5018
Copyright Page 5021
Senior Editors 5022
Associate Editors 5024
Table of Contents 5028
Foreword 5034
Preface 5036
Volume 5 5038
H 5038
Human Depth Electrodes 5038
Methodological Considerations 5038
Depth Electrodes in the Basal Ganglia and Related Structures 5038
Local Field Potentials Recorded from the Basal Ganglia and Related Structures 5038
Insights from Single-Unit Recordings in Subcortical Structures 5039
Future Directions 5039
Depth Electrode Recordings in Patients with Pharmacologically Resistant Epilepsy 5039
LFPs in Patients with Epilepsy 5040
LFP insights into cognitive processes 5040
Findings from Single-Unit Recordings in the Human MTL and Other Regions 5041
Insights into basic mechanisms of epilepsy and sleep behavior 5041
Insights into memory function 5041
Another role for the hippocampus: Human spatial navigation 5042
Visual perception 5043
Perception of speech and music 5044
Findings related to emotional processes 5044
Motor planning and execution 5045
Investigating the relationship between the blood oxygen level-dependent signal and neuronal activity 5045
Conclusions and Future Directions 5045
Further Reading 5046
Human Haptics 5048
Haptic Perception of Surface and Object Properties 5048
Roughness 5048
Compliance 5048
Thermal 5048
Weight 5048
Curvature, Angle, and Orientation (Tilt) 5049
Shape of Two- and Three-Dimensional Forms Larger than a Fingertip 5049
Size 5050
Haptic Space Perception by Sighted and Blind Observers 5050
Haptic Recognition of Objects 5050
Role of Hand Movements 5050
Relative precision of information 5052
Breadth of property information 5052
Duration 5052
Co-executability 5052
Implications for Haptic Object Classification 5052
Consequences of Constraining Manual Exploration in Space and/or Time 5053
Spatial constraints 5054
Temporal constraints 5054
Applications 5055
Further Reading 5055
Human Methods: Psychophysics 5056
Introduction 5056
Theoretical Concepts 5056
Representation of Information 5056
Relationship to the Goal of Psychophysics 5057
Psychophysical Methodologies 5057
Detection Experiments 5057
The Yes/No method 5058
m-Interval forced-choice method 5061
Vigilance paradigm 5062
Tracking techniques 5062
Discrimination Experiments 5062
Scaling Experiments 5062
Further Reading 5063
Humans 5066
Stimulus Overload and Working Memory 5066
Encoding Memories 5067
Selecting Semantic Memory 5068
Retrieving Autobiographical Memories 5069
A Board of Executives 5070
Further Reading 5070
Huntington's Disease 5072
Further Reading 5074
Huntington's Disease: Neurodegeneration 5076
Huntington's Disease 5076
Neurodegeneration in HD 5076
Neurodegeneration in In Vitro Models of HD 5077
Neurodegeneration in In Vivo Models of HD 5077
Pathophysiological Mechanisms of Neurodegeneration in HD 5079
Conclusion 5080
Further Reading 5081
Hyperacuity 5082
Acuity 5082
Better Than Acuity 5082
General Considerations 5086
Auditory, Tactile and Other Senses 5086
Further Reading 5086
Hypocretin/Orexin and MCH and Receptors 5088
Discovery 5088
Structure 5088
Distribution 5088
Receptors and Signaling Cascades 5089
Input/Output 5090
Biological Actions within the Brain 5090
Feeding and Metabolism 5090
Motivation and Addiction 5092
Arousal 5092
Rodent models 5092
Human narcolepsy 5092
Concluding Remarks 5093
Further Reading 5093
Hypothalamic Structure-Function Relationships 5094
Introduction 5094
Functional Organization of the Hypothalamus 5094
Hypothalamic Influences upon the Temporal Organization of Behavior 5095
Hypothalamic Regulation of Reproductive Function 5098
Hypothalamic Regulation of Feeding 5100
Summary and Conclusions 5101
Further Reading 5101
Hypothalamic-Pituitary-Adrenal (HPA) Axis 5102
The Hypothalamic-Pituitary-Adrenal Axis 5102
The Paraventricular Nucleus of the Hypothalamus 5102
Pituitary Corticotropes 5102
Adrenal Zona Fasciculata 5102
CBG (Transcortin) Binding 5102
Inhibition of the HPA Axis by GC 5103
Distinctive HPA Axis Drivers 5103
Periodic/Circadian Drivers of the HPA Axis 5103
The suprachiasmatic nuclei 5103
The food-entrainable oscillator 5104
Homeostatic Inflow: Systemically Responsive Networks Driving the HPA Axis 5105
The arcuate NPY/melanocortin system 5105
Systemic threats: The medullary NE/E/NPY system 5105
The Hypothalamic Visceromotor Pattern Generator 5106
Psychogenic Networks Driving the HPA Axis 5107
GCs in Central Motive States and Central Plasticity 5108
Corticotropin-Releasing Factor 5108
Norepinephrine 5108
Dopamine 5109
Endogenous Opioid Peptides 5109
Memory 5109
Neuronal Remodeling 5110
Conclusion 5110
Further Reading 5110
Hypothalamic-Pituitary-Thyroid Axis: Organization, Neural/ Endocrine Control of TRH 5112
Introduction 5112
Biosynthesis and Processing of TRH 5112
TRH Gene and Promoter Regulation 5112
Anatomical Organization and Central Mediators of the Hypothalamic TRH Tuberoinfundibular System 5116
Feedback Regulation of Hypophysiotropic TRH by Thyroid Hormone 5118
Regulation of Hypophysiotropic TRH by Cold Exposure and Suckling 5120
Regulation of Hypophysiotropic TRH by Fasting and Infection (Nonthyroidal Illness Syndrome) 5120
Further Reading 5123
Relevant Website 5124
I 5126
Ideal Observer Theory 5126
Introduction 5126
Defining the Ideal Observer 5126
The Generative Model 5126
The Task Requirements 5127
Optimal Action or Decision Rule 5127
Applications of Ideal Observer Theory 5128
Examples of Ideal Observer Analysis 5128
Signal Detection 5128
The generative model 5128
The task 5129
The optimal decision rule 5129
How to compare test and ideal observers? 5130
Estimation 5130
The generative model 5130
The task 5130
The optimal decision rule 5131
How to compare test and ideal observers? 5131
Related Areas 5132
Further Reading 5132
Imaging Studies Using Reporter-Gene Transgenic Rats 5134
Introduction 5134
Reporter Genes 5134
LacZ (beta-Galactosidase) 5134
Green Fluorescent Protein and Spectral Variants 5134
Luciferase 5134
Transgenic Animals Carrying a Reporter Gene 5135
Establishment of Transgenic Animals 5135
Tissue-Specific Promoters 5135
Ubiquitous Promoters 5135
Tracking of Green Fluorescent Protein- Labeled Neural Stem/Progenitor Cells 5135
In Vivo Tracking of Luciferase-Labeled Cells 5138
Imaging Studies Using Dual-Reporter Genes 5139
Further Reading 5139
Immune Function During Sleep and Sleep Deprivation 5140
Context and Questions 5140
Sleep Responds to Experimental Immune Challenge 5140
Animal Models 5140
Human Models 5140
Effects of Sleep Deprivation on Host Defense 5141
Animal Models 5141
Normal Rhythms of Immune-Active Cells and Modulating Hormones in Humans 5142
Sleep Deprivation in Humans 5142
Further Reading 5144
Immune System-Neuroendocrine Interactions 5146
Introduction 5146
Possible Pathways by Which Circulating IL-1beta Signals the Brain 5146
Biosynthesis of PGs 5147
PGE2 Sites of Action 5148
Functional Circuits by Intraparenchymal PGE2 5149
Alternative Pathways 5150
Concluding Remarks 5152
Further Reading 5152
Induced Seizures as Therapy in Man 5154
History 5154
Indications 5155
Depressive Mood Disorders 5155
Melancholia 5155
Delusional (psychotic) depression 5155
Pseudodementia (reversible dementia) 5156
e9780080446172v6 6231
Front Cover 6231
Encyclopedia of Neuroscience 6232
Copyright Page 6235
Senior Editors 6236
Associate Editors 6238
Table of Contents 6242
Foreword 6248
Preface 6250
Volume 6 6252
N 6252
Napping 6252
Introduction 6252
Definitions and Demographics of Napping 6252
What Is a Nap? 6252
Changes in Napping Behaviors across the Life Span 6252
Is Napping a Natural Part of Our Circadian Rhythm? 6253
Timing of Naps 6253
Physiological Evidence for 'Nap Zone' 6253
Behavioral Markers for the 'Nap' Zone 6254
What Is the Function of Naps? 6255
Sleepiness versus Fatigue Countermeasures 6255
Napping in Sleep-Deprived Conditions 6255
Cognitive Benefits of Napping Linked to Specific Stages of Sleep 6256
Summary 6256
Further Reading 6257
Relevant Website 6257
Narcolepsy 6258
What Is Narcolepsy? 6258
Narcolepsy Symptoms 6258
Dissociated REM Sleep in Narcolepsy 6258
Genetic Predisposition to Narcolepsy- Cataplexy 6259
Narcolepsy-Cataplexy Is Tightly Associated with Hypocretin Deficiency 6259
Neurobiology of the Hypocretin Systems and Relevance to Narcolepsy 6259
Is Narcolepsy an Autoimmune Disorder? 6262
Narcolepsy without Cataplexy 6263
Therapies for Narcolepsy 6264
Perspectives for New Treatments 6265
Further Reading 6265
Natriuretic Peptides 6266
Introduction 6266
Natriuretic Peptides in the CNS 6266
ANF 6266
ANF and inflammation 6266
The hypothalamic-pituitary-adrenocortical (HPA) system and ANF 6266
ANF and alcohol withdrawal 6267
BNP 6268
CNP 6268
Further Reading 6269
Natural Images: Coding Efficiency 6270
Introduction 6270
Efficient for What Task? 6270
Defining Efficiency 6271
Representational Efficiency 6271
Correlation and Decorrelation 6272
Optimal Information Transfer 6272
Beyond Correlations: Sparseness and Independence 6273
Optimality with Nonlinear Systems 6274
Metabolic Efficiency 6275
Spike Efficiency 6275
Minimum Wiring 6275
Learning Efficiency 6276
Sparseness and Invariance 6276
Overcompleteness 6276
'Hard-Coded' Efficiency 6277
Efficient Learning from the Environment 6277
Hybrid Strategies: Efficient Innate Learning 6277
Conclusion 6278
Further Reading 6278
Nausea and Vomiting 6280
Biological Significance 6280
Motor Components 6281
Preejection or Prodromal Phase 6281
Ejection Phase: Retching and Vomiting 6281
Coordination of the Motor Components 6282
Triggering the Emetic Reflex 6282
Gastrointestinal Afferents 6282
Area Postrema 6282
Vestibular system 6283
Nausea 6283
Anti-emetic Agents 6284
Further Reading 6285
Neglect Syndrome and the Spatial Attention Network 6288
The Neuropsychology of Neglect 6288
Spatial Attention Network in the Human Brain 6290
Functional Imaging of Spatial Attention 6291
Conclusions 6291
Further Reading 6292
Neocortex: Origins 6294
Introduction 6294
Historical Background 6294
Developmental and Genetic Evidence 6295
Reptilian Dorsal Cortex: Neocortical and Entorhinal/Subicular Features 6296
The Dorsalization Hypothesis 6297
Lamination of the Neocortex: The Preplate 6297
Origin of the Superficial Neocortical Layers and the Inside-Out Neurogenetic Gradient 6298
A Scenario for the Origin of Neocortical Lamination 6299
Final Comments 6300
Further Reading 6301
Neocortical Organization in Monotremes 6302
Introduction 6302
Gross Brain Morphology 6302
Somatosensory and Electrosensory Cortex 6302
Visual Cortex 6305
Auditory Cortex 6307
Motor Cortex 6307
Multimodal and Frontal Regions of Cortex 6308
Comparisons with Other Mammals 6308
Further Reading 6310
Neonatal Circuits 6312
Introduction 6312
Segmental and Spatial Distribution of the Pattern-Generating Circuitry in Neonatal Spinal Cord 6312
Sensory Pathway Interneurons and Pattern Generation in Neonatal Spinal Cord 6312
Specific Interneuronal Circuits 6314
Interneurons Involved in the Patterning of Motor Neuron Activity during Locomotion 6318
Further Reading 6320
Nerve Growth Factor 6322
Early History 6322
Neurotrophin Family 6322
Neurotrophin Receptors 6322
Neurotrophin Signaling 6322
TrkA Signaling 6322
p75 Signaling 6323
NGF and Development 6323
Axon Growth 6323
Cell Survival 6323
Postnatal Development 6323
Developmental Effects of Other Neurotrophins 6324
Biological Effects of NGF In Vivo: Nociception 6324
Mechanisms of Acute NGF-Induced Sensitization of Nociceptors 6325
Via trkA 6325
Via p75 6325
Inflammation-Induced Release of NGF into Peripheral Tissues 6326
Long-Term Effects of NGF on Nociceptive Signaling 6326
The Effect of Other Neurotrophins and Glial- Derived Neurotrophic Factors on Peripheral Sensitization 6327
Neurotrophins, Central Sensitization, and Neuropathic Pain 6327
Effects of Neurotrophins on Axonal Growth in Adults 6328
Clinical Implications of Neurotrophin Biology 6328
Further Reading 6329
Network Control 6330
The Neuroanatomy of Breathing 6330
Respiratory Neurons 6330
Respiratory-Related Neurons 6330
Brain Stem Respiratory Neuron Groups 6330
Nucleus of the Solitary Tract and Dorsal Respiratory Group 6330
Ventral Respiratory Column 6331
Pontine Respiratory Group 6332
Mesencephalic Influences on Breathing 6333
Periaqueductal gray 6333
Forebrain influences on breathing 6334
Monoamine systems and breathing 6335
Respiratory Reflexes 6336
Receptors in the Nasal Passages and Pharynx 6336
Receptors in the Lower Airways 6337
Second- and Higher-Order Neurons in Respiratory Reflexes 6338
Central Pathways of Slowly Adapting Stretch Receptors 6338
Central Pathways of Rapidly Adapting Stretch Receptors 6338
Deflation-Activated Receptor-Mediated Reflexes 6339
Central Pathways of Peripheral Chemoreceptors 6339
Summary 6339
Further Reading 6339
Neural Cell Adhesion Molecules and Synapse Regulation 6342
The Neural Cell Adhesion Molecule 6342
N-CAM and Synaptic Plasticity 6342
N-CAM Is a Signal Transducer 6344
N-CAM Associates with and Reorganizes the Cytoskeleton 6344
Clustering of N-CAM Induces Signaling through Lipid Rafts 6345
N-CAM Activates Gene Transcription 6346
N-CAM Regulates Synapse Formation 6346
Dysfunction of N-CAM Leads to Psychiatric Disorders 6347
Further Reading 6347
Neural Circuitry in the Somatosensory System 6348
Somatosensory Circuits 6348
Ascending Somatosensory Pathways 6348
Time-Locked Neuronal Responses 6348
Local Inhibitory Circuits 6348
Somatosensory Neuronal Interactions 6349
Feed-Forward Transmission 6349
Thalamocortical Feed-Forward Interactions 6350
Somatotopic Influences 6351
Dynamic Interactions 6351
Neuronal Synchronization 6351
Thalamocortical Cooperativity 6352
Cortical Coordination 6353
Corticocortical Synchronization 6353
Corticocortical and Corticofugal Interactions 6353
Further Reading 6354
Neural Coding in Primary Motor Cortex 6356
Introduction 6356
Sensorimotor Transformations and Coordinate Frames 6356
Kinesiology of Reaching Movements 6356
Correlations Based on Single-Cell Activity 6357
Correlations Based on Population Codes 6357
Dissociation of Parameters 6361
Context-Dependent Change in Neural Coding 6361
Neural Coding in Premotor Cortex 6362
Beyond Neural Coding 6362
Further Reading 6366
Neural Coding of Spatial Representations 6368
Neuronal Signals That Encode Spatial Location 6368
Receptive Field Properties 6368
Areas That Specialize in Spatial Processing 6368
The Precision of Spatial Representations in the Brain 6369
Tuning Curve Width and Optimal Sensory Coding 6369
Tuning Curve Width and Motor Constraints 6370
Reference Frames in the Cortex 6371
References for Sensory Responses 6371
References for Motor Responses 6371
Changing Reference Frames 6371
Keeping Objects Separate 6372
Further Reading 6373
Neural Crest 6374
Introduction 6374
Induction and EMT 6374
Cranial Neural Crest 6377
Vagal Neural Crest 6380
Cardiac Neural Crest 6380
Enteric Nervous System 6380
Trunk Neural Crest 6381
Ventral Pathway 6382
Dorsolateral Pathway 6383
Sacral Neural Crest Cells 6383
Plasticity of Trunk Neural Crest Cells 6383
Conclusion 6384
Further Reading 6384
Neural Crest Cell Diversification and Specification: ErbB Role 6386
Components of the NRG-E rbB Signaling System 6386
NRG1-ErbB Signaling Regulates SC Lineage Development 6387
NRG1-ErbB Signaling as a Master Regulator of Myelination in the Peripheral Nervous System 6388
ErbB Signaling in the Mature Peripheral Nervous System and in Pathological Conditions 6391
Future Research 6392
Further Reading 6393
Neural Crest Cell Diversification and Specification: Melanocytes 6394
Introduction 6394
Development of Melanocytes 6394
Melanoblast Specification: The Interplay between Signaling Pathways and Transcription Regulation 6395
Melanoblast Specification: Cell Number and Location 6398
Melanoblast Survival, Proliferation, and Migration 6399
Melanoblast Differentiation 6400
Adult Melanocyte Stem Cells 6400
Further Reading 6401
Relevant Website 6402
Neural Crest Diversification and Specification: Transcriptional Control of Schwann Cell Differentiation 6404
The Role of Transcription Factors in the Schwann Cell Lineage 6404
Transcriptional Control of Schwann Cell Specification 6404
Hooked on Neuregulins: The Schwann Cell Precursor 6404
Molting into an Immature Schwann Cell 6405
Maintaining the Immature State 6405
Choosing between Two Alternative Fates during Terminal Differentiation 6405
Triggering Myelination by Axonal Signals 6406
Escorting Schwann Cells into the Myelinating Stage 6406
Finalizing Myelination 6407
Regulating Myelin Gene Expression 6407
Open Questions 6408
Further Reading 6408
Neural Induction in Chicks 6410
Introduction - Neural Induction as a Complex Process 6410
The Timing of Neural Induction 6412
Not Just a Decision between Neural Plate and Epidermis 6414
Conclusions - Neural Induction Is Not Yet a Solved Problem 6414
Further Reading 6415
Neural Integrator Models 6416
Introduction 6416
From Concepts to Cellular Mechanisms 6418
Diversity of Model Scenarios 6420
Network Integrator Models 6420
Rate code 6420
Location code 6422
Single Neuron Integrator Models 6423
Hybrid Models Incorporating Synaptic Feedback and Intrinsic Bistability 6425
Accumulation of Information versus Graded Memory 6427
Challenges and Future Directions 6427
Further Reading 6429
Neural Oscillators and Dynamical Systems Models 6430
Introduction 6430
Equilibria 6430
Limit Cycles 6435
Summary 6438
Further Reading 6438
Neural Patterning: Arealization of the Cortex 6440
Introduction 6440
Putting the Neocortex in Its Place 6440
Corticogenesis 6441
Areas Differentiate within a 'Uniform' Cortical Plate Characterized by Exuberant Distribution of Projection Neurons 6441
Cytoarchitecture and Exuberant Projection Neurons 6442
Area-Specific Thalamocortical Afferent Input and Potential Roles in Area Patterning 6443
Indirect Evidence for Intrinsic Genetic Regulation of Area Identity 6443
Roles for Morphogens and Transcription Factors in Control of Area Identity 6443
Intrinsic Control of Area Identity by Differential Expression of Transcription Factors in Cortical Progenitors 6444
Emx2 6444
COUP-TFI 6444
Pax6 6444
Sp8 6444
Interactions between regulatory genes in controlling area patterning 6445
Morphogens/Signaling Molecules Establish Graded Patterns of Transcription Factor Expression in Cortical Progenitors 6445
FGF8 6445
Wnts and BMPs 6445
Anteroposterior Patterning of the Cerebral Cortex: Are Arealization and Regionalization Related? 6446
Translation of Graded Expression of TFs by Cortical Progenitors and Their CP Progeny into Sharp Borders Exhibited by Cortical A 6446
What Is 'Area Identity'? 6447
Further Reading 6448
Neural Patterning: Eye Fields 6450
Introduction 6450
Retinal Patterning along the A-P Axis 6450
Retinal Patterning along the D-V Axis at the Early Stages 6452
Retinal Patterning along the D-V Axis at the Later Stages 6453
Other Aspects of Retinal Patterning 6454
Further Reading 6455
Neural Patterning: Midbrain-Hindbrain Boundary 6456
Neural Induction and Posteriorization 6456
Positioning of the Brain Primordia 6456
Function of Local Organizers 6458
Boundaries and Lineage Restriction 6459
First Step in Competence: Integration of the Signal by the Surrounding Tissue 6459
A Further Aspect of Competence: Predetermination of Cellular Fate 6460
Functional Range of Organizers Is Determined by the Receiving Field 6461
Further Reading 6462
Neural Prostheses for Reaching 6464
Introduction 6464
Progress in Neural Prostheses 6464
Decoding Cognitive Motor Signals 6464
Fast Decoding 6466
Clinical Applications 6467
Electrode Design and Biocompatibility 6468
Decoding from Local Field Potential Signals 6469
Conclusions 6470
Further Reading 6471
Neural Repair and Regeneration: Inflammatory Mechanisms and Cytokines 6472
Introduction 6472
Cytokines 6472
Microglia 6472
Astroglia 6473
The Role of Adaptive Immunity in Regulating the Glial Inflammatory Response 6473
Excitoxicity and Adaptive Immunity 6474
Regulation of Cytokine Release: Intensity and Timing 6474
Astroglial Scar Formation 6475
Central Nervous System Pathologies Associated with a Beneficial Inflammatory Response 6475
Blood-Brain Barrier Integrity 6475
Neuronal Survival 6475
Remyelination 6476
Axogenesis and Synaptogenesis 6477
Neurogenesis 6477
Further Reading 6477
Neural Stem Cells and CNS Diseases 6480
Introduction 6480
Neural Stem Cell Biology 6480
Definition of NSCs 6480
Stem Cell Niche and Function of NSCs in the Developing and Adult CNS 6480
Isolation, and Propagation of Murine and Human NSCs 6481
NSCs and CNS Repair 6482
Sources of NSCs for CNS Repair 6482
Identification and Fate of Donor NSCs in the CNS 6483
Properties of NSCs for CNS Therapy 6483
Representative Therapeutic Uses 6483
NSC therapy for globally affected CNS diseases 6483
NSC therapy in locally affected CNS disorders 6487
Future Needs and Directions 6487
Further Reading 6488
Neural Stem Cells: Adult Neurogenesis 6490
Introduction 6490
Location of Adult NSCs in the Mammalian Brain 6490
Identity of Adult NSCs 6492
Identification of NSCs by Cell Division Markers 6492
Identification of NSCs by Molecular Markers 6492
Identification of NSCs by Genetic Methods 6493
Regulation of Adult NSCs 6493
Extracellular Influences 6493
Intracellular Signaling 6494
The Function of Adult NSCs 6495
Conclusion 6495
Further Reading 6496
Neural Stem Cells: Ocular 6498
Introduction 6498
Retinal Progenitors in Normal Development 6498
Retinal Stem Cells in the Ciliary Marginal Zone 6499
Additional Sources of Retinal Stem and Progenitor Cells 6500
The Pigmented Epithelium 6500
The Ciliary Epithelium 6500
Intrinsic Stem Cells, Rod Precursors, and Muumlller Glia 6501
Further Reading 6502
Neural Synchrony and Feature Binding 6504
Synchrony as Tag of Relatedness 6505
The Role of Oscillations and Spike Synchronization 6506
The Duration of Synchronized Events 6506
Synchrony and Feature Binding 6506
The Role of Attention 6507
Oscillations and Read-Out 6508
Conclusions 6509
Further Reading 6509
Neurexins 6512
Gene Structure 6512
Protein Structure 6512
Interaction Partners 6513
Extracellular Binding Partners 6513
Intracellular Binding Partners 6513
Expression 6514
Function of Neurexins 6515
Role of Neurexins in Synaptic Transmission 6515
Role of Neurexins in Synaptogenesis 6515
Presynaptic assembly 6516
Postsynaptic assembly 6516
Development of synapse specificity 6516
Synaptic cell adhesion 6518
Clinical Aspects of the Neurexin- Neuroligin Complex 6518
Further Reading 6518
Neuroanatomy Methods in Humans and Animals 6520
Classical Histochemical Techniques 6520
Modern Molecular Techniques 6522
Confocal Microscopy 6523
Quantitative Studies of the Nervous System 6524
Intracellular Techniques and Three- Dimensional Reconstruction of Individual Cells 6525
Neuroanatomical Tract-Tracing Techniques 6526
Electron Microscopy 6528
Live Imaging Techniques 6529
Further Reading 6529
Neurodegeneration in Psychiatric Illness 6530
Definitions and Research Limitations 6530
Evidence for Neurodegeneration in Psychiatric Illness 6530
Clinical Course 6530
Schizophrenia 6530
Bipolar disorder and major depression 6530
Neuroimaging 6531
Postmortem Neuropathological Findings 6532
Schizophrenia 6532
Unipolar depression and bipolar disorders 6532
Classic neurodegeneration and depression 6533
Preclinical Data 6533
Animal Models for Psychiatric Disorders 6533
Psychosis and mania 6533
Depression 6533
Neuroprotective Effects 6533
Neurotrophic Effects 6534
Summary 6534
Further Reading 6534
Neuroeconomics: History 6536
Overview 6536
Critical First Steps 6537
Landmark Papers 6537
Summary 6540
Further Reading 6541
Neuroendocrine Aging: Hypothalamic-Pituitary-Gonadal Axis in Women 6542
Introduction 6542
Overview of the Hypothalamic-Pituitary -Ovarian Axis in Young Women 6542
Ovarian Aging and the Menopausal Transition 6542
Effects of Ovarian Failure on the Hypothalamic-Pituitary Axis 6544
Effects of Menopause on Neuronal Morphology and Neuropeptide Gene Expression in the Human Hypothalamus 6545
Aging of the Reproductive Neuroendocrine Axis, Independent of the Effects of Gonadal Status 6547
Summary 6547
Further Reading 6547
Neuroendocrine Aging: Pituitary Metabolism 6550
Overview 6550
GH and IGF-1 6551
Invertebrate Studies 6551
Mammalian Studies: Background 6551
Effects of Age on the GH/IGF-1 Axis 6552
Actions of GH and IGF-1 in Older Animals 6553
Animal Models of GH/IGF-1 Excess and Deficiency 6553
Insulin and Glucose Regulation 6555
Endocrine Effects of Moderate Caloric Restriction: Interactions with Insulin and IGF-1 6556
Prolactin 6556
Basic Regulation and Actions 6556
Prolactin Secretion and Aging 6557
TSH: Tri-iodothyronine, Thyroxine, and Thyroid Function 6557
Conclusions 6558
Further Reading 6558
Neuroendocrine Aging: Pituitary-Adrenal Axis 6560
Introduction 6560
HPA Axis and Glucocorticoids 6560
Glucocorticoid Cascade Hypothesis 6560
HPA Axis in Aging Rodents 6560
HPA Axis Pulsatility 6561
Glucocorticoid Feedback 6562
Brain Corticosteroid Receptors 6562
Corticosteroid Receptor Balance and Aging 6562
Modulation of Brain Corticosteroid Receptors and HPA Axis: Implications for Aging 6563
Glucocorticoids and Aging: Mechanisms 6564
Age-Related Changes during Hypercorticism: The Relevance of Context 6564
Possible Mechanisms Underlying Glucocorticoid-Related Damage 6564
HPA Axis, Aging, and Age-Related Pathology in Humans 6565
Future Directions 6566
Further Reading 6566
Relevant Website 6566
Neuroendocrine Aging: Pituitary-Gonadal Axis in Males 6568
Overview 6568
Rate of Evolution and Extent of Relative Hypoandrogenemia in Older Men 6568
Mechanistic Bases of Testosterone Depletion 6569
Putative Pathophysiological Mechanisms in the Aging Male 6569
Hypothalamic GnRH Deficiency in Older Men 6569
Enhanced Gonadotrope Secretory Responsiveness to Small Amounts of GnRH 6571
Impaired Leydig Cell Steroidogenesis in Older Men 6571
Aging Restricts Feedback by Endogenous Testosterone on GnRH and LH Secretion 6572
FSH and Inhibin B 6572
Prolactin 6573
Neurohormonal Network Regulation in Aging Men 6574
Summary 6576
Further Reading 6576
Neuroendocrine Control of Energy Balance (Central Circuits/ Mechanisms) 6578
Key Hormonal Signals 6578
Leptin 6578
Insulin 6580
Ghrelin 6580
Peptide YY 6580
Glucagon-like Peptide 1 6580
Metabolic Signals 6581
Neurotransmitters 6581
Serotonin 6581
Dopamine 6582
Further Reading 6582
Neuroendocrine Control: Maternal Behavior 6584
Introduction 6584
Measurement of Maternal Behavior 6584
Developmental Aspects of Maternal Behavior 6584
Hormonal Regulation of Maternal Behavior 6585
Steroid Hormones 6585
Estradiol 6585
Progesterone - 'Priming and timing' 6586
Protein Hormones 6587
Prolactin/placental lactogens 6587
Neural Basis of Maternal Behavior 6587
Neural Network of Maternal Behavior 6587
Neural Underpinnings of Maternal Aggression 6588
Hormone-Brain Interactions 6588
Neurotransmitter Systems 6589
Pup-Directed Maternal Behavior 6589
Maternal Aggression 6590
Genes and Motherhood 6591
Null Mutations 6591
Parent of Origin Effects 6591
Epigenetic Transmission of Maternal Behavior 6591
Experimental Modifications of Maternal Behavior 6591
Maternal Memory 6591
Reproductive Experience and Maternal Behavior 6592
Further Reading 6593
Neuroendocrine Peptide Processing 6594
Introduction 6594
The Proprotein Convertase Gene Family 6594
Neural and Endocrine Functions of the Proprotein Convertases 6596
Neuroendocrine Convertases PC1/3 and PC2 6596
Ubiquitous Convertases Furin, PC7, and SKI-1/S1P 6598
Convertases PC5/6 and PACE4 6600
Convertase PCSK9 (Originally Named NARC-1) 6600
Summary 6601
Further Reading 6601
Neuroendocrinology 6602
Further Reading 6604
Neuroendocrinology of Affective Disorders 6606
Introduction 6606
Corticotropin-Releasing Factor in Depression and Anxiety Disorders 6606
Basic Biology 6606
HPA Axis Abnormalities in Depression 6607
Extrahypothalamic CRF and Depression 6609
CRF and Anxiety Disorders 6610
Glucocorticoid Receptor Antagonists and Depression 6610
The HPA Axis in Depression and Anxiety: Conclusions 6610
Thyrotropin-Releasing Factor, the Hypothalamic-Pituitary -Thyroid Axis, and Depression 6611
Biology 6611
Psychiatric Manifestations of Thyroid Dysfunction 6611
TRH and TSH in Depression 6611
Bipolar Disorder and HPT Abnormalities 6612
Thyrotropin-Releasing Hormone Alterations in Anxiety Disorders 6612
Growth Hormone and Somatostatin 6613
Biology 6613
GH and Affective Disorders 6613
Somatostatin and Psychiatric Disorders 6614
Hypothalamic-Prolactin Axis 6614
Biology 6614
Prolactin-Releasing Factor 6614
PRL and Psychiatric Disorders 6614
Arginine-Vasopressin 6615
Biology 6615
AVP in Anxiety and Depression 6615
Oxytocin 6616
Biology 6616
Oxytocin and Psychiatric Disorders 6616
Clinical Implications and Conclusions 6616
Further Reading 6617
Neuroendocrinology of Puberty 6618
General Concepts 6618
The Hypothalamic-Pituitary -Gonadal Axis 6618
Central Role of the GnRH Neuron 6618
Transsynaptic Control of the GnRH Neuronal Network 6620
Classical Inhibitory Neurotransmission 6620
GABA 6620
Opioid peptides 6620
Classical Excitatory Neurotransmission 6620
Glutamate 6620
Catecholamines 6621
Neuropeptide Y 6621
The Novel Kisspeptin-GPR 54 Signaling System 6621
Glial Control of the GnRH Neuronal Network 6621
Glial Growth Factors 6622
Glutamate 6623
Small Bioactive Molecules 6623
Neuron-to-Glia Communication 6623
Transcriptional Control of the Onset of Puberty 6623
An Integrated View 6625
Further Reading 6626
Neuroendocrinology of Social/Affiliative Behavior 6628
Introduction 6628
Oxytocin and Vasopressin: Neuropeptides of Affiliation 6628
Social Recognition in Rodents 6628
Neuroendocrine Control of Parental Behavior in Rodents 6629
Maternal Care in Rats and Mice 6629
Spontaneous Maternal Care in Prairie Voles 6630
Paternal Care 6630
Social Bonding 6631
Mother-Infant Bonding in Sheep 6631
Pair Bonding in Monogamous Prairie Voles 6631
Implications for Human Social Behavior 6633
Conclusions 6633
Further Reading 6634
Neuroethics 6636
Introduction 6636
History 6636
Features of the Nervous System with Ethical Implications 6636
Structure of Neuroethics 6637
Conduct of Neuroscience Research 6637
Clinical research 6638
Basic research 6638
Bias in research 6638
Application of Research Findings 6639
Who, why, and how 6639
Brain-computer interfaces 6640
Neurobiology of Ethics 6641
Conclusion 6641
Further Reading 6642
Neuroethological Perspective 6644
Introduction 6644
The Economics of Natural Behavior 6644
Neurobiology of Reward and Decision Making 6645
Uncertainty and Decision Making 6646
Social Rewards in Primates 6648
Social Games 6649
Conclusion 6650
Further Reading 6650
Neurofibromatosis Type 1 6652
Introduction 6652
NF1 Phenotype 6652
Diagnostic Criteria 6652
Tumors 6652
Nontumor Manifestations 6653
Genetics of NF1 6655
Genetic Transmission 6655
Segmental NF1 and Mosaicism 6655
NF1 Gene Mutations 6655
Genotype-Phenotype Correlations 6655
Variable Expression 6655
Pathophysiology of NF1 6656
Function of Neurofibromin 6656
NF1 Is a Tumor Suppressor Gene 6656
Management of NF1 6656
Surveillance 6656
Treatment of Manifestations 6657
Further Reading 6658
Relevant Websites 6658
Neurofibromatosis Type 1: Molecular and Cellular Biology 6660
Introduction 6660
Clinical Aspects 6660
Diagnostic Criteria 6660
Cafeacute-au-lait spots 6661
Neurofibromas 6661
Intertriginous freckling 6661
Optic pathway tumors 6661
Lisch nodules 6661
Distinctive osseous lesion 6661
Family history of NF1 6662
Medical Complications 6662
Genetic Principles and NF1 6662
Variable Expressivity 6662
Penetrance 6662
Pleiotropy/Mosaicism/Mutation 6663
Molecular Biology of NF1 6663
Gene Cloning 6663
Gene Structure 6663
Neurofibromin Function 6664
Gene Expression 6665
Pathophysiology of NF1 6665
Genotype-Phenotype Relationships 6666
The Role of NF1 in Tumorigenesis 6666
Animal Models for NF1 6667
Conclusions 6667
Further Reading 6668
Relevant Websites 6668
Neurofibromatosis Type 2 6670
Introduction 6670
Epidemiology and Diagnostic Criteria 6670
Clinical Features 6670
Tumor Manifestations of NF2 6670
Schwannomas 6670
Meningiomas 6670
Spinal cord gliomas 6671
Nontumor Manifestations of NF2 6671
Ophthalmic abnormalities 6671
Neuromuscular abnormalities 6671
Delineation of NF2 from NF1 6672
Molecular Genetics of NF2 6672
Linkage Studies and Positional Cloning of the NF2 Gene 6672
NF2 Gene and Its Protein Product 6674
Tissue specificity 6674
Regulation and function of merlin 6674
Model organisms 6674
Tumor studies 6674
Mutational Analysis of the NF2 Gene 6675
Mosaicism 6675
Genotype/phenotype correlations 6675
Future Directions 6676
Further Reading 6676
Relevant Websites 6676
Neurofibromatosis Type 2: Further Questions and Answers 6678
Introduction 6678
Epidemiology, Clinical Features, and Diagnostic Criteria 6678
Identification of the NF2 Gene 6680
Genotype-Phenotype Correlation in NF2 6680
Mosaicism and Schwannomatosis 6681
Biological Role of the NF2 Protein 6681
Conclusions 6682
Further Reading 6682
Neurofilaments: Organization and Function in Neurons 6684
Neurofilaments in Neuronal Function 6684
Introduction to Neurofilaments 6684
Structure of the Neurofilament Proteins 6684
Function of Neurofilaments 6684
The Involvement of Neurofilaments in Neurodegenerative Diseases 6686
Disorganized Neurofilament Arrays as a Cause for Motor Neuron Disease 6686
Mutations in Neurofilament Genes Linked to Human Motor Neuron Diseases 6686
Axonal Neurofilaments as Determinants of Neurodegeneration in ALS 6687
Conclusion 6687
Further Reading 6687
Neurogenesis and Neural Precursors, Progenitors, and Stem Cells in the Adult Brain 6688
Defining Neural Stem Cells, Progenitors, and Precursors 6688
The Discovery of Constitutively Occurring Adult Mammalian Neurogenesis 6689
Neurogenic versus Nonneurogenic Regions in the Adult Brain 6689
Induction of Neurogenesis in Nonneurogenic Regions of the Adult Brain 6691
Conclusions and Future Prospects 6692
Further Reading 6692
Neurogenesis in the Intact Adult Brain 6694
History 6694
Adult Hippocampal Neurogenesis 6695
Adult Olfactory Neurogenesis 6696
Regulation 6696
Function 6697
Medical Relevance 6697
Further Reading 6698
Neurohypophyseal System 6700
Hormone Structure, Biosynthesis, and Secretion 6700
Peptide and Prohormone Structure and Processing 6700
Genes and mRNA 6700
Structure of the Neurohypophyseal System 6700
Hypothalamic Nuclei (Supraoptic/Paraventricular/Accessory) 6700
Glial/Neuronal Interactions 6702
Regulation of Hormone Secretion 6703
Vasopressin 6703
Osmotic regulation 6703
Pressure/volume regulation 6703
Other physiological regulators 6704
Electrophysiology of VP neurons 6704
Oxytocin 6705
Pregnancy and parturition 6706
Suckling 6706
Homeostatic regulation of OT release 6706
Ejaculation 6707
Electrophysiology of OT neurons 6707
Further Reading 6708
Neuroimaging 6710
Introduction 6710
Computed Tomography 6710
Emission Computed Tomography 6712
Magnetic Resonance Imaging 6715
Functional Magnetic Resonance Imaging 6717
Summary 6719
Further Reading 6720
Neuroimmune System: Aging 6722
The Immune-Neuroendocrine System: The Evolutionary Perspective 6722
Immunosenescence 6723
Inflamm-Aging 6724
Inflammation and the Neuroendocrine System 6724
Major Depression 6724
Anorexia Nervosa 6725
Alzheimer's Disease 6725
Frailty Syndrome 6726
Conclusion 6727
Further Reading 6727
Neuroinformatics 6728
Successes and Challenges of Modern Neuroscience 6728
Neuroinformatics: Premise and Promise 6728
Institutional Resources and Initiatives 6729
A Sampler of Individual Projects and Databases 6730
NeuroMorpho.org: Opportunities and Solutions for Cellular Structure 6733
The Future: Explosive Potential of Digital Neuroscience 6734
Further Reading 6735
Relevant Websites 6735
Neuroleptics 6736
Introduction 6736
Antipsychotic Affinity for the Dopamine Receptor 6736
Studies of Antipsychotic Action in Living Patients 6736
Second-Generation Antipsychotics 6737
Mechanisms of Atypicality 6738
5HT2A Occupancy 6738
Extrastriatal Selectivity 6738
Intrastriatal Selectivity 6738
How Might Atypical Drugs Show Extrastriatal and Intrastriatal Selectivity? 6739
Dopamine Abnormalities in Schizophrenia 6739
Negative Symptoms 6740
Dopamine-Stabilizing Drugs 6741
The Future of Antipsychotic Treatment in Schizophrenia 6741
Conclusions 6741
Further Reading 6742
Neuroligins 6744
Neuroligin Genes and Structures 6744
Recognition of the Neurexins 6744
Neuroligins in Development and Disease 6744
Neuroligin in the Peripheral Nervous System and Secretory Tissues 6746
Conclusions 6746
Further Reading 6747
Neuromodulation 6748
Introduction 6748
Mechanisms of Neuromodulation 6748
Neuromodulation of Neuronal Properties 6749
Neuromodulation of Synaptic Properties 6750
Time Course of Neuromodulation 6751
The Complexity of Neuromodulation 6751
Sources of Neuromodulation 6752
Functions of Neuromodulation 6752
Homeostasis and Neuromodulation 6753
Neuromodulation and the Evolution of Behavior 6753
Summary 6753
Further Reading 6754
Relevant Websites 6754
Neuromodulation of Calcium Channels 6756
Introduction 6756
Neurotransmitter Modulation of Cav2 Channels 6756
Mechanisms of G-Protein Modulation 6756
Voltage-dependent G-protein inhibition 6756
Voltage-independent G-protein inhibition 6756
Modulators of G-Protein Inhibition 6757
RGS proteins 6757
Synaptic proteins 6758
Protein kinase C 6758
Cav2 alpha1 splice variation 6758
Neurotransmitter Modulation of Cav1 Channels 6758
Neurotransmitter Modulation of Cav3 Channels 6760
Ca2+-Dependent Modulation of Cav Channels 6760
Calmodulin as a Cav Channel Subunit 6760
Calmodulin-Like Ca2+-Binding Proteins as Cav Modulators 6761
CaBP regulation of Cav2.1 channels 6761
CaBP regulation of Cav1 channels 6762
Calmodulin-Dependent Protein Kinase II Regulation of Cav1 Channels 6762
Conclusions 6762
Further Reading 6763
Neuromodulation of Sodium Channels 6764
Introduction 6764
Na+ Channel Protein Phosphorylation and Dephosphorylation 6764
Functional Modulation of Cloned and Expressed Na+ Channels 6764
Sites of Neuromodulation by PKA and PKC 6764
Membrane Potential-Dependent, Convergent Regulation by PKA and PKC 6765
Enhancement of Slow Inactivation by Protein Phosphorylation 6766
Modulation of Na+ Channels in Neurons 6767
Role of Kinase Anchoring in Na+ Channel Modulation in Neurons 6768
Functional Consequences of Na+ Channel Modulation 6768
Other Regulatory Pathways 6770
Further Reading 6770
Neuromorphic Systems 6772
Neuromorphic Engineering 6772
Digital and Analog in Neuromorphic VLSI Systems 6772
Emulation versus Simulation 6774
Neurons in Silicon 6774
Integrate-and-Fire Models 6774
Conductance-Based Models 6775
Axons, Action Potentials, and the Address-Event Representation 6776
Synapses in Silicon 6777
Plasticity and Learning 6777
Memory and Synaptic Weight Storage 6777
Multichip Neural Networks 6778
Impact of Neurobiology on Computer Engineering 6779
Further Reading 6779
Neuromuscular Connections: Vertebrate Patterns of 6780
Neural Control of Muscles 6780
Diversity of Vertebrate Skeletal Muscles 6780
General Features of the Motor Innervation of Skeletal Muscles 6781
Phylogenetic Variation in Patterns of Skeletal Muscle Innervation 6781
Agnatha (Hagfish, Lamprey) 6781
Cartilaginous Fish (Dogfish) 6782
Bony Fish (Tench, Zebra Fish) 6782
Amphibia (Salamanders, Frogs) 6782
Urodeles 6782
Anura 6782
Reptiles (Garter Snake, Lizard, Turtle) 6782
Birds (Chicken) 6784
Mammals (Human, Rat, Mouse, Cat) 6784
Variations in NMJ Properties 6784
Patterns of Motor Unit Use in Vertebrate Muscles 6785
Conclusions 6787
Further Reading 6788
Neuromuscular Junction (NMJ): A Target for Natural and Environmental Toxins in Humans 6790
Natural Toxins and the Neuromuscular Junction 6790
Voltage-Gated Ion Channels 6790
Sodium Channels 6792
Calcium Channels 6794
Potassium Channels 6795
Presynaptically Active Neurotoxins 6796
Postsynaptically Active Toxins 6798
Myotoxic Activity 6798
The Anatoxins 6799
Miscellaneous 6799
Summary 6799
Further Reading 6800
Neuromuscular Junction (NMJ): Acetylcholinesterases 6802
Introduction 6802
AChE Detection and Assay 6802
Structure of AChE 6803
AChE Oligomeric Forms 6803
Noncatalytic AChE Subunits 6804
Biogenesis, Processing, and Assembly of AChE 6804
Mechanism of AChE Localization at the Neuromuscular Junction 6805
Appearance of AChE during Development of Skeletal Muscle 6806
Regulation of AChE Expression in Muscle 6806
Consequences of AChE Inactivation in Muscle, Pesticides, Nerve Gases, Congenital Myasthenia, and Alzheimer's Disease 6807
Epilogue 6809
Further Reading 6809
Relevant Website 6809
Neuromuscular Junction (NMJ): Activity-Dependent Muscle Fiber Modulation 6810
Introduction 6810
Motor Neurons Form Motor Units to Drive the Muscles 6810
The Firing Patterns of Motor Neurons 6810
Plateau Potentials Generate Tonic Firing 6812
Motor Neuron Firing Regulates Muscle Force Output 6812
The Neuromuscular Junction 6813
NMJs Differ in Structure and Function 6813
Plasticity of NMJs 6814
Mechanisms of Plasticity 6814
The Muscle Fibers 6815
Plasticity of Muscle Fibers 6816
Adaptation to Fast and Slow Impulse Patterns 6816
Matching Impulse Patterns and Contraction Speed 6816
Adaptation within Adaptive Ranges 6816
Cellular Mechanisms of Adaptation 6817
Conclusions 6818
Further Reading 6818
Neuromuscular Junction (NMJ): Aging 6820
Aging Effects on Motor Units 6821
Structure of Neuromuscular Junctions 6822
Aging Effects on NMJ Structure 6823
Neuromuscular Transmission 6823
Aging Effects on Neuromuscular Transmission 6824
Conclusions 6824
Further Reading 6824
Neuromuscular Junction (NMJ): Inherited and Acquired Disorders 6826
Background 6826
Investigating Neuromuscular Transmission in Human Disease 6826
Treatment of Neuromuscular Junction Disorders 6826
Congenital Myasthenic Syndromes 6826
AChR Deficiency 6827
Kinetic Abnormalities of the AChR 6827
AChE Deficiency 6827
Choline Acetylase Deficiency 6829
Limb Girdle Myasthenia 6829
Autoimmune Disorders 6829
Myasthenia Gravis 6829
Ocular MG 6830
MG without AChR Antibodies 6831
Maternal Antibodies and Development 6831
The Lambert-Eaton Myasthenic Syndrome 6831
Paraneoplastic Neurological Disorders 6832
Acquired Neuromyotonia 6832
Miller-Fisher Syndrome 6833
Further Reading 6833
Relevant Websites 6834
Neuromuscular Junction (NMJ): Mammalian Development 6836
Introduction 6836
Development of Motor Neurons 6836
Birth 6836
Axon Outgrowth and Motor Neuron Identity 6836
Release of Acetylcholine from Growth Cones 6836
Development of Skeletal Muscle Fibers 6836
Myotube Formation 6836
Kinetics of Primary and Secondary Myotube Formation 6836
Origin of Muscle Fiber Types 6837
Early Appearance of Delocalized Postsynaptic Properties 6837
Early Development of the NMJ 6837
Initial Nerve-Muscle Encounters 6837
Polyaxonal Innervation 6837
AChR Accumulation 6837
AChR aggregation 6838
Upregulation of postsynaptic gene expression 6839
Schwann Cells: The Motor Neurons' Companion 6839
NMJ Maturation: Presynaptic 6839
Myelination of the Axon 6839
Synapse Elimination 6839
Maturation of the Nerve Terminal 6839
Transmitter release 6840
Ca2+ Channel Switch 6840
NMJ Maturation: Postsynaptic 6840
Remodeling of the Postsynaptic Zone 6840
Redistribution of AChRs and AChE 6840
Appearance of voltage-gated sodium channels channels and postsynaptic folds 6840
Formation of the folds 6840
Molecular Differentiation of the Postsynaptic Zone 6841
Changes in AChR expression 6841
Changes in NaV1 expression 6842
mRNA accumulation 6842
Accumulation of Myonuclei 6842
Mammalian Motor Unit Maturation 6843
Firing Patterns 6843
Efficacy of Neuromuscular Transmission 6843
Development of Muscle Fiber Homogeneity 6843
Conclusions 6844
Further Reading 6844
Neuromuscular Junction (NMJ): Postsynaptic Basal Lamina 6846
Introduction 6846
Synaptic Basal Lamina Components 6846
Collagen IV 6846
Laminins 6847
Nidogens (Entactins) 6848
Fibronectin 6848
Heparan Sulfate Proteoglycans 6848
Perlecan 6849
Collagen XVIII 6849
Agrin 6849
AChE 6849
Cell Surface and Membrane Receptors 6849
Dystroglycan Complex 6849
MuSK 6850
Integrins 6850
Cadherins 6850
Proteases at the Neuromuscular Junction 6851
Matrix Metalloproteinases 6851
Tissue Inhibitors of Metalloproteinases 6851
Conclusion 6851
Further Reading 6851
Neuromuscular Junction (NMJ): Postsynaptic Events in Neuromuscular Transmission 6852
Essentials of Neuromuscular Transmission in Vertebrates 6852
AChRs and the Generation of the Endplate Current 6852
From EPCs to EPPs 6854
Passive Cable Properties of Muscle Fibers 6854
Spatial factors 6855
Effects of membrane capacitance 6856
Initiation of the Muscle AP 6856
Structure of the Postsynaptic Apparatus 6856
Safety Factor for AP Generation 6858
Termination of ACh Action 6858
How Different Species Achieve Reliability 6858
Some Special Cases 6858
Frog 'Slow' Fibers 6859
Mammalian Extraocular Fibers 6860
Intrafusal Fibers 6860
Conclusions 6860
Further Reading 6860
Neuromuscular Junction (NMJ): Presynaptic Non-Quantal Release of Transmitter 6862
Introduction 6862
Early Observations 6862
The H-Effect 6862
The VAChT Hypothesis 6863
Modulation of NQR 6864
AChE Activity and NQR 6864
Purinergic Regulation of NQR 6864
Biological Aspects of NQR 6865
Denervation 6865
Reinnervation 6865
Hibernation 6865
Physiological Implications 6865
Surplus Polarization of Muscle Fibers at the NMJ 6866
Role of Na+-K+ATPase 6866
Early Postdenervation Depolarization (EPD) 6866
Muscarinic AChRs (mAChRs) and EPD 6867
Hypertonicity and EPD 6867
Summary 6867
Glutamate 6867
Conclusions 6867
Further Reading 6868
Neuromuscular Junction (NMJ): Presynaptic Schwann Cells and Modulation of Neuromuscular Transmission 6870
Introduction 6870
An Advantageous Position 6870
Detectors of Synaptic Transmission 6870
A Cocktail of Presynaptically Released Molecules 6870
A Variety of Receptors 6870
An Evolutionarily Conserved Property 6871
Adapted Ca2 Responses 6871
Presence of Voltage-Gated Ion Channels 6871
Modulators of Synaptic Transmission 6871
G-Protein Signaling 6871
Calcium Signaling 6872
Glutamate Carboxypeptidase II 6873
Putative Gliotransmitters 6874
Possible Mediators of Synaptic Depression 6875
Nitric oxide 6875
Glutamate 6875
Endocannabinoids 6877
Arachidonic acid 6877
Possible Mediators of Synaptic Potentiation 6877
Prostaglandins 6877
Neurotrophic factors: BDNF 6877
Long-Term Modulation by PSCs 6877
Conclusion 6878
Further Reading 6878
Neuromuscular Junction (NMJ): Presynaptic Short-Term Plasticity of Neuromuscular Transmission 6880
Introduction 6880
Techniques of Study 6880
Facilitation of Transmitter Release 6881
Augmentation of Transmitter Release 6881
Potentiation and Posttetanic Potentiation of Transmitter Release 6881
Relationship between the Components of Increased Transmitter Release 6882
Comparison of the Components of Increased Transmitter Release at Three Different Preparations 6882
Mechanisms for the Components of Increased Transmitter Release 6882
Depression of Transmitter Release 6883
Mechanisms of Depression 6884
Developing Models to Describe Mechanisms Consistent with Short- Term Plasticity 6885
Short-Term Synaptic Memory 6885
Further Reading 6885
Neuromuscular Junction (NMJ): Presynaptic Stretch Effects on Neuromuscular Transmission 6886
How Muscle Stretch Influences Neuromuscular Transmission 6886
The Kinetics of Stretch-Induced Enhancement of Release 6886
Lack of Dependence on Ca2+ Influx or Release of Ca2+ from Internal Stores 6886
Integrins as Mediators of the Stretch Modulation 6887
The Intracellular Mechanism of Modulation of Release 6889
Functional Importance and Generality of the Phenomenon 6890
Further Reading 6891
Neuromuscular Junction Plasticity in Mammals and Botulinum Toxins 6892
Introduction 6892
Natural Plasticity of the NMJ 6892
Plasticity During Aging 6892
The Response to Muscle Damage 6892
The Response to Nerve Injury 6893
Partial denervation 6893
Complete denervation 6893
The Role of the Schwann Cell 6894
How Is Nerve Terminal Sprouting Regulated? 6894
The role of activity 6895
Growth factors 6895
Botulinum Toxins and How They Block Neuromuscular Transmission 6895
Natural History of Botulism and Botulinum Neurotoxins 6895
Clinical features of the disease 6896
Botulinum neurotoxin structure and serotypes 6896
Overview of Botulinum Neurotoxin Action 6896
Binding and Activation of Botulinum Neurotoxins 6897
Binding targets 6897
Uptake, translocation, and activation 6898
Enzyme activity 6898
Response of the Neuromuscular Junction to Botulinum Neurotoxin 6898
Block of Transmission 6898
Recovery of Transmission after Block by BoNT/A 6898
Axon sprouting 6898
Formation of new synapses 6898
Recovery of Quantal Release 6899
Withdrawal of sprouts 6899
Serotypes other than BoNT/A 6899
Differences Related to Muscle Type and Species 6900
Effects on muscle 6900
Clinical and Cosmetic Uses of BoNT/A 6900
Effects of Botulinum Neurotoxins on Human Neuromuscular Junctions and Muscle 6901
Time course of action 6901
Effects on nerve 6901
Effects on muscle 6902
Conclusion 6902
Further Reading 6902
Neuromuscular Junction: Neuronal Regulation of Gene Transcription at the Vertebrate 6904
The Vertebrate Neuromuscular Junction: An Excellent System for Studying Neurotransmitter Receptor Accumulation in the Postsynap 6904
Expression of AChRs throughout Uninnervated Differentiating Myotubes Is Replaced by Synapse-Specific Expression in Innervated F 6905
Do Motor Neurons Produce Signals That Induce Clustering of AChRs at the Synapse, Stimulate Synapse-Specific AChR Synthesis, or 6906
A Nerve-Derived Factor Inducing AChR Aggregation: AGRIN 6906
Candidate Nerve-Derived Factors Inducing AChR Gene Transcription 6906
alphaCGRP and ATP 6907
Neuregulins 6907
In vitro studies implicating NRG1 as a motor neuron-produced signal regulating postsynaptic AChR gene expression 6907
In vivo genetic studies have revealed relatively normal NMJ development in mice lacking neuro muscular NRG signaling 6907
Essential functions of NRG1 in neuromuscular development 6907
AGRIN 6908
AGRIN molecular variants and the AGRIN receptor MUSK 6908
In vivo genetic studies of AGRIN'S roles in synapse-specific gene expression 6908
Signaling Pathways by Which MuSK Regulates Postsynaptic Gene Expression 6910
Musk expression in the postsynaptic membrane: A positive feedback loop? 6910
Signaling pathways 6910
MUSK and synaptic nuclei 6910
A number of proteins in addition to AChRs and MUSK display synapse-specific expression 6910
Models of Neuromuscular Synapse Formation 6911
Neurocentric Model 6911
Myocentric Model 6911
A Unifying Model? 6912
Conclusion 6912
Further Reading 6912
Neuromuscular Junction: Synapse Elimination 6914
Introduction 6914
From pi to μ 6914
Synapse Elimination versus Synapse Degeneration 6916
Real-Time Visualization of Synapse Elimination In Vivo 6916
Is competition local? 6916
The fate of the losers 6917
Are There Intrinsic Hierarchies Among Motor Neurons? 6917
The Role of Activity in Synapse Elimination 6918
Muscle Fiber Type Specificity and Selective Synapse Elimination 6918
Molecular Mechanisms of Synapse Elimination and Axonal Pruning 6918
Neurotrophic Influences on the Rate of Synapse Elimination 6918
Role of Proteases and the Ubiquitin-Proteasome System 6919
Role of Other Nonneural Cell Types at Immature and Adult NMJs 6919
Synapse Elimination and Neurodegenerative Disease 6919
Summary 6920
Further Reading 6921
Neuromuscular Transmission Modulation at Invertebrate Neuromuscular Junctions 6922
General Features of Modulation at Invertebrate Neuromuscular Junctions 6922
Presynaptic Membrane Potential 6922
Activity-Dependent Modulation 6923
Short-Term Modulation 6923
Synaptic enhancement 6923
Synaptic depression 6927
Long-Term Modulation 6928
Long-term facilitation 6928
Experience-dependent strengthening 6928
Long-term depression 6934
Long-term adaptation 6934
Molecular Approaches 6936
Inhibitory Modulation 6936
Presynaptic Inhibition 6936
Autoinhibition 6937
Neuromodulators and Neurohormones 6938
General Features 6938
Amines 6938
Octopamine 6938
Serotonin 6939
Peptides 6940
FMRFamide-like peptides 6940
Proctolin 6940
PACAP-like neuropeptide 6940
Conclusion 6941
Further Reading 6941
Neuron Doctrine: Historical Background 6942
Overview 6942
Modern Research First Confirmed, Then Challenged the Classical Neuron Doctrine 6943
Chemical versus Electrical Transmission 6943
The Neuron: From Simple to Complex Functional Unit 6944
A New Theoretical Framework for Brain Organization: Multilevel Functional Units 6944
Summary 6945
Further Reading 6945
Neuronal Angiotensin 6948
Overview of Systemic Angiotensin Production 6948
Tissue Renin-Angiotensin Systems 6948
Angiotensinogen in Brain 6949
Renin in the Brain 6949
Angiotensin Converting Enzyme 6950
Ang II/III Peptide Localization 6951
Angiotensin AT1 Receptors 6951
Actions via AT1 Receptors 6951
Angiotensin AT2 Receptors in Brain 6952
Ang 1-7 and Its Binding Site, the mas Oncogene 6953
Ang IV and Its Binding Site, IRAP 6953
Conclusion 6953
Further Reading 6953
Neuronal Motility and Structure: Cdk5 Pathways 6954
Introduction to Cdk5 6954
Cdk5 and the Cyclin-Dependent Kinase Family 6954
Cdk5 is an atypical cyclin-dependent kinase 6954
p35 and p39 are essential activators of Cdk5 6954
Posttranslational modifications of Cdk5 6954
Consensus site for phosphorylation by Cdk5 6954
Cdk5 and Its Activators 6954
Cdk5 activity is defined by the distribution of p35 and p39 6954
Cdk5 Regulates Neuronal Migration 6955
Mouse Models of Cdk5 Deficiency 6955
Cerebral cortex 6955
Other brain regions 6955
Brief Introduction to Neocortical Development 6955
Different neurons in the neocortex come from distinct places 6955
Formation of cortical laminae 6955
Cdk5 Activity Is Essential for Proper Neocortical Lamination 6956
Formation of cortical laminae in p35 knockout mice 6956
Reelin Signaling Also Regulates Neuronal Migration 6956
Mouse Models of Reelin Deficiency 6956
Distinctions between Cdk5 and Reelin Mutant Mice 6956
Formation of the Preplate 6956
Migratory Mode 6957
Somal translocation 6957
Locomotion 6957
Migratory modes in Cdk5 and Reelin mutant mice 6957
Compound Mutant Mice 6957
Doublecortin and Dynein Pathways in Neuronal Migration 6957
Doublecortin 6957
Dynein, Lis1, and Ndel1 (Nudel) 6958
Cdk5 Pathways Controlling Neuronal Migration 6958
Cdk5 Phosphorylation of Focal Adhesion Kinase 6958
S732-phosphorylated Focal Adhesion Kinase regulates centrosome-associated microtubules 6958
The role of the cytoskeleton in migrating neurons 6958
S732-phosphorylated FAK and nucleokinesis 6958
Cdk5 Phosphorylation of Doublecortin 6959
Cdk5 Phosphorylation of Ndel1 6959
Cdk5 Phosphorylation of p27 (kip1) 6960
Other Substrates of Cdk5 Potentially Important for Neuronal Migration 6960
Cdk5 and Axon Guidance 6960
Corpus Callosum Defects in p35-Deficient Mice 6960
Cdk5 and Semaphorin 3A 6960
Cdk5 and GDNF/GFRalpha1 6961
Cdk5 Pathways Control Neuronal Motility and Structure 6961
Further Reading 6961
Neuronal Motility and Structure: MARK and GSK Pathways 6962
Introduction 6962
Microtubules and Microtubule-Associated Proteins in Neuronal Motility and Structure 6962
A Conserved Role of MARK/PAR-1 Kinases in Establishing Cell Polarity 6962
MARK Kinases Play an Important Role in Regulating Axonal Transport and Neurite Outgrowth 6963
Upstream and Downstream of MARK/PAR-1 6963
GSK-3beta in Neuronal Motility and Structure and Its Relationship with MARK/PAR-1 6965
MARK and GSK-3beta Pathways in Neurodegenerative Diseases 6966
Summary 6967
Further Reading 6967
Neuronal Pacemaking 6968
Introduction 6968
Types of Pacemaking Neurons 6968
Mechanisms of Pacemaking 6968
Hyperpolarization-Activated Current 6968
Persistent Sodium Current 6970
Resurgent Sodium Current 6971
Voltage-Activated Calcium Current 6971
Importance of Resting Potential 6972
Voltage-Dependent and Calcium-Dependent Potassium Conductances as Regulators of Firing Rate 6973
Plasticity of Pacemaking 6974
Significance of Pacemaking 6976
Pathophysiology of Pacemaking 6976
Summary 6976
Further Reading 6976
Neuronal Plasticity after Cortical Damage 6978
Measuring Brain Plasticity 6978
Behavioral Change after Brain Injury 6978
Neuronal Adaptations to Brain Injury 6979
Plasticity after Adult Brain Injury 6979
Plasticity after Infant Brain Injury 6980
Factors Influencing Recovery and Plasticity after Cortical Injury in Adulthood 6980
Factors Influencing Recovery and Plasticity after Cortical Injury in Infancy 6981
Summary 6981
Further Reading 6981
Neuron-Glia Coupling in Glutathione Metabolism 6984
Introduction 6984
Metabolism of GSH in Brain Cells 6984
Synthesis of GSH 6984
Metabolism of GSH 6984
Delivery of GSH Precursors from Astrocytes to Neurons 6985
Export of GSH 6985
Extracellular Processing of GSH 6986
Uptake of Amino Acids into Neurons 6986
Implications for a Disturbed GSH Metabolism in Parkinson's Disease 6987
Dopamine and GSH 6987
TNF-alpha and gamma-GT 6987
Conclusions 6988
Further Reading 6988
Neuron-Glia pH Regulation 6990
Introduction 6990
Intracellular pH and Buffering 6990
Extracellular pH and Buffering 6991
Baseline Interstitial pH of the Brain 6991
Buffering Properties of the Brain Interstitial Fluid 6991
pH Regulation in Neurons 6992
pH Regulation in Glial Cells 6993
Changes in pH Evoked by Neuronal Activity 6994
Activity-Dependent Shifts in Neuronal Intracellular pH 6994
Activity-Dependent Shifts in Glial Intracellular pH 6995
Activity-Dependent Shifts of Interstitial pH 6995
Functional Aspects of H+ Homeostasis and H+ Signaling 6996
Summary 6997
Further Reading 6997
Neuropathic Pain 7000
Etiology of Neuropathic Pain 7000
Nerve Trauma 7000
Disease Induced 7000
Chemotherapy Induced 7002
Mechanisms of Neuropathic Pain 7002
Role of the Peripheral Nervous System 7003
Ectopic activity 7003
Peripheral sensitization 7004
Role of the Central Nervous System 7005
Role of the Sympathetic Nervous System 7006
Influence of the Immune System 7006
Further Reading 7008
Neuropathy: Chemically-Induced 7010
Introduction 7010
Neuronopathies 7010
Methylmercury 7010
Methanol 7011
Axonopathies 7011
Organophosphate-Induced Delayed Polyneuropathy 7011
n-Hexane 7012
Carbon Disulfide 7013
Acrylamide 7013
Myelinopathies 7014
Hexachlorophene 7014
Lead 7014
Neurotransmission-Associated Neurotoxicity 7015
Nicotine 7015
Conclusion 7015
Further Reading 7016
Neuropathy: Metabolically-Induced 7018
Diabetic Neuropathies: Overview 7018
Neuropathy with Impaired Glucose Tolerance 7018
Symmetric Sensorimotor Polyneuropathy 7018
Asymmetric Diabetic Neuropathies 7020
Diabetic Autonomic Neuropathy 7021
Pathogenetic Mechanisms of Diabetic Neuropathy 7023
Advanced Glycosylation End Products Formation 7023
Apoptosis 7023
Autoimmune Processes 7023
Axonal Transport 7023
Ischemia 7023
Mitogen-Activated Protein Kinases 7023
Neurotrophic Substances 7023
Oxidative Stress 7024
Polyol Pathway 7024
Protein Kinase C 7024
Regeneration and Synaptic Dysplasia 7024
Uremia 7024
Vitamin Deficiencies 7025
Beriberi (Thiamine) 7025
Pellagra (Niacin) 7025
Cobalamin (Vitamin B12) 7025
Vitamin E 7025
Hypothyroid Neuropathy 7025
Acromegaly 7025
Liver Disease 7026
Alcoholism 7026
Summary 7026
Further Reading 7026
Relevant Website 7026
Neuropathy: Peripheral 7028
Introduction 7028
The PNS 7028
Pathobiological Mechanisms in Peripheral Neuropathy 7030
Charcot-Marie-Tooth Disease 7030
Diabetic Polyneuropathy 7030
Guillain-Barreacute Syndrome 7031
Toxic Polyneuropathy 7032
Further Reading 7033
Neuropeptide FF and Receptors 7034
Five Neuropeptide Genes and New Receptor Mechanisms 7034
Discovery of a New Neuropeptide Gene Family 7034
Neuropeptide FF, the Prototype Mammalian RFamide Peptide 7034
Prolactin-Releasing Peptide 7036
Arg-Phe-Amide-Related Peptide 7036
P518/26RFa/QRFP 7036
Kiss-1 7036
GPCR Mechanisms 7036
Multiple Functions of Mammalian RFamide Peptides 7037
Sensory and Autonomic Functions 7037
Central Endocrine Regulation 7038
Energy Balance, Feeding, and Water Balance 7038
Further Reading 7038
Neuropeptide Inactivation or Metabolism 7040
Introduction 7040
Information Transfer by Neuropeptides versus Neurotransmitters 7040
Peptidase-Induced Inactivation of Neuropeptides 7041
Similarities and Differences in Zinc Metallopeptidases Involved in Neuropeptides Catabolism 7042
Natural and Synthetic Inhibitors of Neuropeptide Metabolizing Enzymes 7044
Biochemical Criteria Used to Characterize Neuropeptide-Activating or -Inactivating Peptidases 7044
Anatomical Criteria 7044
Analytical Criteria: Microdialysis Experiments 7045
Pharmacological Experiments Required to Attribute the Role of Activating or Inactivating Peptidase to a Neuropeptide- Cleaving 7046
Investigation of the Physiological Roles of a Given Neuropeptide through Selective Inhibitor-Induced Modulation of Its Extracel 7047
Physiological Interactions between Two Neuropeptidergic Systems Studied by Inhibition of Metabolyzing Enzymes 7047
Several Zinc Metallopeptidases Produce Two Active Neuropeptides, Angiotensin III and IV, from the Brain Angiotensin II 7048
Conclusion 7049
Further Reading 7049
Neuropeptide Receptors - Drug Development 7052
Neuropeptide Ligands 7052
Neuropeptide Signaling as Drug Target 7052
Neuropeptide Receptors as Drug Targets 7053
Validation of Neuropeptide Receptors as Drug Targets 7053
The Problems of Finding Exogenous Ligands to Neuropeptide Receptors 7056
Agonists 7056
Nonpeptide agonists to neuropeptide receptors 7056
Nonpeptide Antagonists to Neuropeptide Receptors 7059
Lack of Structural Information on the G- Protein-Coupled Receptors 7059
Dynamics of Neuropeptide-G -Protein-Coupled Receptor Functions in Drug Development 7059
Perspective 7060
Summary 7060
Further Reading 7061
Neuropeptide Release 7062
Introduction 7062
Neuropeptide Release Compared to Classical Neurotransmitter Release 7062
Synthesis 7062
Vesicle Types and Release Sites 7062
Calcium Dependent Release 7062
Timescale of Neuropeptide Release and the Type of Stimulus Required 7062
Molecular Release Mechanisms - SNARE Machinery 7064
Termination of the Signal 7064
Neuropeptide Release Is Not Uniform 7065
Variations between different neurons and over time 7065
Variation within neurons - axon terminal versus somatodendritic release 7065
Physiological Effects of Neuropeptide Release 7066
Summary 7067
Further Reading 7067
Neuropeptide S 7068
Structure and Expression of Neuropeptide S 7068
NPS Receptor 7069
Physiological Effects of NPS 7069
Genetics of NPSR 7069
Further Reading 7070
Neuropeptide Signaling in Invertebrates 7072
Introduction 7072
Neuropeptides and Their Precursors in Invertebrates 7072
Neuropeptides and Their Roles in Some Invertebrates 7072
Cnidarians Provide Information on Basic Neuropeptide Signaling 7072
The Nematode Worm C. elegans 7073
Mollusks 7074
Crustaceans 7074
Drosophila and Other Insects 7075
Evolutionary Conservation of Peptide Signaling 7077
Summary and Conclusion 7079
Further Reading 7079
Neuropeptide Synthesis and Storage 7080
Introduction 7080
Steps in Peptide Biosynthesis 7080
Precursor-Processing Enzymes 7081
Processing Enzyme Knockouts 7083
Granule Biogenesis and Storage 7083
Peptides in the Nervous System 7085
Genes Controlling Expression of Granules and Granule Proteins 7086
Further Reading 7087
Neuropeptide Y (NPY) and its Receptors 7088
Introduction 7088
Expression and Regulation of NPY 7088
Functional Activities of NPY 7089
PYY and PYY3-36 Function 7089
PP Function 7090
Receptors for the NPY Family of Peptides 7090
Y1 Receptor 7090
Y2 Receptor 7090
Y4 Receptor 7091
Y5 Receptor 7092
Regulation of Y Receptors 7092
Internalization and desensitization of NPY family receptors 7092
Dimerization among NPY family receptors 7092
The NPY System and Medication Development 7092
Further Reading 7093
Neuropeptides and Coexistence 7094
General Concepts and Definitions 7094
Cellular and Subcellular Sites of Neuropeptide Storage 7094
Localization within Large Granular Vesicles 7094
Synthesis, Storage, and Targeting to Processes 7094
Coexistence 7095
Neuropeptide Co-Localization 7095
Spinal cord 7096
Hypothalamus 7096
Retina 7097
Coexistence of Neuropeptides and Fast-Acting Neurotransmitters 7097
Acetylcholine 7097
Amino acids 7097
Biogenic amines 7097
Nitric oxide 7097
Coexistence of Neuropeptides and Brain-Derived Neurotrophic Factor 7097
Neurotransmitter Function of Neuropeptides 7097
Neuropeptides as Slow-Acting Neurotransmitters 7098
Mode(s) of Release 7098
Functional Implications of Neuropeptide Coexistence 7099
Further Reading 7100
Neuropeptides and Receptors in Glia 7102
Introduction 7102
Illustrative Neuropeptides 7103
Angiotensin II 7103
Atrial Natriuretic Peptide 7105
Calcitonin Gene-Related Peptide 7106
Galanin 7106
Neuropeptide Y 7107
Opioids 7108
Substance P 7109
Vasoactive Intestinal Peptide/Pituitary Adenylate Cyclase-Activating Polypeptide 7109
Future Directions 7110
Further Reading 7110
Relevant Website 7110
Neuropeptides in Autonomic Neurons 7112
Introduction 7112
Calcitonin Gene-Related Peptide 7112
Enkephalins 7113
Galanin 7113
Neuropeptide Y 7114
Somatostatin 7114
Substance P 7115
Vasoactive Intestinal Polypeptide and Pituitary Adenylate Cyclase-Activating Polypeptide 7115
Other Neuropeptides 7116
Further Reading 7116
Neuropeptides Internalization 7118
Introduction 7118
Neurobiology of Substance P and NK- 1 Receptor 7118
Localization of Substance P and NK-1 Receptors in the Brain and Spinal Cord 7118
Substance P-NK-1 Internalization following Noxious Stimuli 7120
Using Receptor Internalization to Deliver Therapies That Target Specific Classes of NK-1-Expressing Cells 7120
Summary 7121
Further Reading 7122
Neuropeptides Phylogeny and Evolution 7124
Introduction 7124
Duplications within Genes 7124
Gene Duplications 7126
Proposed Vertebrate Chromosome or Genome Duplications 7128
Phylogenetic Sequence Analyses 7128
Evolutionary Change of Neuropeptide Functions 7129
Summary and Conclusion 7130
Further Reading 7131
Neuropeptides: Discovery 7132
Introduction 7132
The Discovery of Neuropeptides 7132
The Organ Bath-Based Approaches 7132
The first neuropeptide and the enkephalins 7132
Two families of hormones that became neuropeptides 7132
Three schools of neuropeptide discovery 7133
The Nucleic Acid-Based Approaches 7133
Neuropeptides discovered as part of precursors 7133
Neuropeptides resulting from alternative splicing 7134
Neuropeptides found by subtractive hybridization 7134
Neuropeptides found by homology screening 7134
Neuropeptides found in silico 7134
The Orphan GPCR-Based Approach 7134
How Many Neuropeptides Are Yet to Be Found? 7134
Further Reading 7135
Neuropeptides: Electrophysiology 7136
Neuropeptides versus Classical Neurotransmitters 7136
Volume Transmission 7136
Neuropeptides: Synthesis, Release, and Degradation 7136
Neuropeptide Receptors 7139
Peptidergic Interneurons 7139
Peptidergic Synaptic Potentials 7140
Growth Factors 7140
Conclusion 7141
Further Reading 7141
Neuropeptides: Endocrine Cells 7142
Introduction 7142
Hormones Later Becoming Neuropeptides 7142
Neuropeptides Entering Endocrine Cells 7142
Messenger Coexistence in Endocrine Cells and Neurons 7143
Adrenal Medulla 7144
Islet Beta Cells 7145
Intestinal L Cells 7145
Coexistence of Peptides with Overlapping Functions 7146
Peptides with Dual Localization in Endocrine Cells and Neurons - Ontogeny and Phylogeny 7146
Role as Principal Hormone or as Co- Expressed Peptide 7146
Pathophysiological Aspects 7147
Concluding Remarks and Future Directions 7147
Further Reading 7148
Neuropeptides: Enteric Nervous System 7150
Neuropeptides in the Enteric Nervous System 7150
Identification, Quantification, Localization, and Biological Actions of Neuropeptides 7151
Establishing Physiological Functions of Enteric Neuropeptides 7152
Functional Role of Peptides in Enteric Circuits 7153
Changes in Peptide Levels and Their Receptors 7156
New Advances 7156
Further Reading 7157
Neuropeptides: Epilepsy 7158
Dale's Principle versus the Concept of Coexistence: Implications for Epilepsy 7158
Temporal Lobe Epilepsy 7158
Several Lines of Evidence Implicate Neuropeptides in the Mechanisms of Epilepsy 7159
Expression of Peptides and Their Receptors Are Altered in Epileptic Brain 7159
Exogenously Administered Neuropeptides Modify Seizures 7159
Animals with Altered Peptide/Peptide Receptor Expression Have Altered Seizure Phenotypes 7160
Other Evidence 7160
Clinical Data 7160
Other Neuropeptides 7160
Seizure-Induced Neuropeptide Plasticity: Maladaptive and Adaptive Changes in Epilepsy 7160
Same Neuropeptide Can Be Both Anticonvulsant and Proconvulsant 7162
In the Same Brain Area, the Neuropeptide Acts at Different Receptor Subtypes 7162
In Different Brain Areas, Activation of the Same Receptor Subtype May Have Opposite Effects on Seizures 7163
Same Peptide Acting at the Same Receptor Subtype Has Different Species- Dependent Effects 7163
Mechanisms of Seizure Modulation by Neuropeptides 7164
G-Protein-Coupled Inward Rectifier K+ Channels 7164
Adenosine Triphosphate-Sensitive K+ Channels 7164
Subthreshold Voltage-Gated K+ Channels 7164
Other Mechanisms 7164
Can Neuropeptides Be Turned into Antiepileptic Drugs? 7164
Nonpeptide Ligands for Peptide Receptors 7164
Peptide Modification 7165
Alternative Routes of Delivery 7165
Further Reading 7165
Neuropeptides: Food Intake 7166
Neuropeptide Y 7166
Agouti-Related Protein 7167
Melanin-Concentrating Hormone 7168
Galanin 7169
Orexins 7169
Opioid Peptides 7170
Conclusion 7171
Further Reading 7172
Neuropeptides: Mental Disease 7174
Introduction 7174
Substance P and Neurokinin Receptor 1 Antagonists in Depression 7174
Growth Hormone-Releasing Secretagogues - Multitasking Neuropeptides 7175
Modulating the Vasopressin System - A Yet Unexploited Therapeutic Strategy for Treating Anxiety Disorders and Depression 7176
The Role of Neurotensin in Causality and Treatment of Schizophrenia 7177
Corticotropin-Releasing Hormone Signaling - New Targets for Drugs for the Treatment of Stress-Related Disorders 7178
Conclusion 7180
Further Reading 7181
Neuropeptides: Pain 7182
General Aspects of Neuropeptides and Pain 7182
Tachykinins 7182
Distribution, Receptors, and Plasticity 7182
Release and Function 7182
Possible Clinical Application 7183
Calcitonin Gene-Related Peptide 7183
Somatostatin 7183
VIP, PACAP-27, and PACAP-38 7183
Galanin 7184
Neuropeptide Y 7184
Opioid Peptides 7184
Cholecystokinin and Other Antiopioid Peptides 7184
Further Reading 7185
Neuropeptides: Sensory Systems 7186
Introduction 7186
Biochemical Characterization and Anatomy of Primary Sensory Neurons 7186
Nociceptive Dorsal Root Ganglion Neurons 7186
Peptidergic and Nonpeptidergic Nociceptors 7188
Target-Derived and Injury-Derived Growth Factors 7189
Target-Derived Neurotrophins 7189
Glial Cell Line-Derived Neurotrophic Factor and Cytokines 7190
Neuropeptide Plasticity Following Inflammation or Nerve Injury 7190
Inflammation 7190
Nerve Injury 7191
Function of Sensory Neuropeptides 7192
The Role of Sensory Neuropeptides in the Spinal Cord 7192
The Role of Peripherally Released Sensory Neuropeptides 7193
Further Reading 7194
Neurophysiology: Past and Present 7196
Introduction 7196
The Reflex 7197
Microstructure and Function 7197
Localization of Function 7198
Further Reading 7200
Neuroplasticity: Computational Approaches 7202
Introduction 7202
Different Induction Protocols for Bidirectional Synaptic Plasticity 7202
Biophysical Models for the Induction of Synaptic Plasticity 7203
Calcium-Dependent Models of Bidirectional Synaptic Plasticity 7204
Two-Coincidence Models and Other Pathways for Induction 7205
Modeling the Biochemical Pathways Leading from Calcium to Change in Synaptic Efficacy 7207
Models for Maintaining Synaptic Plasticity 7208
A Molecular Switch 7208
The Cluster Model 7209
Additional Mechanisms 7210
Discussion 7210
Further Reading 7211
Neuroprotection: Endogenous Mechanisms 7212
Introduction 7212
Triggering Phase 7212
Signal Transduction Phase 7212
Genomic Phase 7213
Cellular Targets of Protection 7213
Synaptic Dysfunction 7214
Mitochondrial Dysfunction 7214
Cerebral Ischemic Preconditioning: Clinical Relevance 7215
Conclusions 7215
Further Reading 7215
Neuroprotection: Pharmacological Approaches 7218
Introduction 7218
The Amyloid Hypothesis 7218
Cholinergic Deficits 7218
Oxidative Stress 7219
Excitotoxicity 7219
Loss of Trophic Support 7219
Selective Pleiotropism as a Consideration in Developing Pharmacological Neuroprotectants 7220
Closing Remarks 7220
Further Reading 7220
Neuroproteomics 7222
Introduction 7222
Proteomic Mass Spectrometry 7222
Subcellular Proteomics 7223
Profiling Synaptic Proteomes 7225
Synaptic Multiprotein Complexes 7226
Synapse Phosphoproteomics 7229
Approaches to Probe the Phosphoproteome 7229
Phosphoproteome enrichment strategies 7229
Mass spectrometry-based strategies for phosphorylation analysis 7229
Challenges of phosphoproteome analysis 7230
Application to the Synapse Phosphoproteome 7230
Neuroproteomics Perspective 7232
Further Reading 7232
Neuropsychological Testing 7234
Introduction 7234
Historical Perspective 7234
The Basic Premise of Neuropsychological Testing 7235
What Comprises a Neuropsychological Evaluation? 7235
Selection of Tests 7235
The Clinical Interview 7236
Test-Taking Effort 7236
Premorbid Level of Cognitive Functioning 7238
Analysis of Test Performance 7239
Emotional, Behavioral, and Personality Testing 7239
Final Interpretations and Recommendations 7239
Repeat Neuropsychological Testing 7240
Common Referral Questions for Adults 7241
Common Referral Questions for Children 7241
Conclusions 7242
Further Reading 7242
Neuropsychology of Primate Reward Processes 7244
What Is Reward and Where Is It Processed? 7244
What Is Special about Reward Processing in Primates? 7244
Amygdala 7245
Reward versus Punishment 7245
Neuropsychology in Nonhuman Primates 7245
What Is Different about Primates? 7247
Prefrontal-Amygdala Interactions 7247
Orbital and Medial Prefrontal Cortex 7248
Basal Ganglia 7248
Summary 7250
Further Reading 7250
Neuropsychology: Theoretical Basis 7252
Birth of Neuropsychology 7252
The Anatomo-Clinical Approach as a Main Root of Neuropsychology 7252
Decline of the Anatomo-Clinical Approach in the First Half of the Twentieth Century 7253
Return of Localization and Connectionism 7253
Technological Progress in the Aid of Neuropsychology 7254
Some Major Achievements of Neuropsychology 7255
Cognitive Neuropsychology: A New Neuropsychology? 7256
The Future of Neuropsychology 7257
Further Reading 7257
Neurosecretion (Regulated Exocytosis in Neuroendocrine Cells) 7258
Introduction 7258
Formulation of the Basic Concept 7258
Model Systems 7258
Extension of the Basic Concept: Secretion from All Parts of Neurosecretory Neurons 7258
Compartments of Neurosecretory Neurons 7259
Perikarya 7259
Axons and Their Specializations 7259
Dendrites 7260
Neurosecretory Vesicles 7260
Neurosecretion from Axons in the Posterior Pituitary and Median Eminence 7262
Electrical Activation of Release 7262
The Role of Calcium Transients in Neurosecretory Axons 7262
Mechanism of Exocytosis in Neurosecretory Axons 7262
Readily Releasable Pool of NeurosecretoryMaterial 7263
Modulation of Secretion from Neurosecretory Axons 7263
Role of Pituicytes: Neuronal-Glial Plasticity 7263
Role of Locally Secreted Factors 7263
Neurosecretion from Soma and Dendrites 7264
Dissociation of Axonal from Soma-dendritic Release 7264
Mechanism of Soma-Dendritic Release: Role of Calcium and Priming of Dendritic Release 7264
Role of Soma-Dendritic Release on Neural Glial Plasticity 7265
Further Reading 7265
Neurosteroids 7266
Introduction 7266
Terminology 7266
Historical Background 7266
Neurosteroid Synthesis and Metabolism 7266
Neural Cells Involved in Neurosteroid Synthesis 7268
Regulation of Neurosteroid Synthesis 7268
Mechanisms of Neurosteroid Actions 7269
Biological Significance 7270
Further Reading 7271
Neurotensin and Receptors 7272
Introduction 7272
Biosynthesis, Processing, and Degradation of NT 7272
Biosynthesis 7272
Processing 7272
Degradation 7273
Brain Distribution of NT 7274
NT Receptors and Signaling 7275
Localization of NT Receptor Subtypes 7278
NTS1 Receptors 7278
NTS2 Receptors 7280
NTS3 Receptors 7281
NT/Dopamine Interactions 7283
NT and Pain Modulation 7284
Feeding Behavior and Obesity 7284
Further Reading 7285
Neurotoxins 7286
Introduction 7286
Historical Background 7286
Criterion for Definition as a Selective Neurotoxin 7286
Nature of Neurotoxin Selectivity 7288
Mechanisms of Neurotoxin Action 7288
Oxidative Inactivation of Vital Cellular Elements 7288
Alkylation of Vital Cellular Elements 7289
Trojan Horse Neurotoxins 7289
Potential for Trojan horse neurotoxins 7289
Neurotoxicity Produced by Excitotoxicity 7289
Interference with Neurotrophin Stimulation or Ontogenetic Nerve Activity 7289
Targeted Antibody - Production of Neurotoxicity 7290
Nonselective Neurotoxin(s) with Specialized Use to Model a Disease State 7290
Neurotoxins for the Future 7290
Ideal Properties of a Neurotoxin 7290
Validation of a Neurotoxin 7290
Neurotoxins as Experimental Tools, and Limitations 7290
Neurotoxins as Therapeutic Agents 7291
Endogenous Neurotoxins and Neuroprotectants 7291
Selective Neurotoxins in the Twenty-First Century 7291
Further Reading 7292
Relevant Websites 7292
Neurotoxins and their Neurotoxicology 7294
Introduction 7294
Factors Governing Neurotoxicity 7294
Targets of Neurotoxic Chemicals 7296
Occurrence of Neurotoxic Disorders 7298
Neurotoxins as Experimental Tools 7300
Further Reading 7300
Neurotransmitter and Hormone Receptors on Oligodendrocytes and Schwann Cells 7302
Oligodendrocytes 7302
Neurotransmitter Receptors and Development 7302
Cell proliferation 7302
Cell migration 7304
e9780080446172v7 7569
Front Cover 7569
Encyclopedia of Neuroscience 7570
Copyright Page 7573
Senior Editors 7574
Associate Editors 7576
Table of Contents 7580
Foreword 7586
Preface 7588
Volume 7 7588
O 7588
Obsessive-Compulsive Disorder 7590
Introduction 7590
Genetics of OCD 7590
Functional Neuroanatomy of OCD 7592
Immunology of OCD 7594
Management of OCD 7595
Further Reading 7596
Relevant Websites 7597
Octopamine and Other Monoamines in Invertebrates 7598
Introduction 7598
Octopamine 7598
Tyramine 7600
Dopamine 7601
Serotonin 7602
Histamine 7603
Summary 7603
Further Reading 7603
Relevant Websites 7604
Oculomotor Control: Anatomical Pathways 7606
Cerebral Cortex and the Control of Eye Movements 7606
Saccadic Eye Movement Pathways 7607
Pursuit Eye Movement Pathways 7609
The Thalamus and Eye Movement Control 7610
Interactions between the Saccadic and Pursuit Pathways 7611
Summary and Conclusions 7611
Further Reading 7612
Oculomotor System: Models 7614
Introduction 7614
Oculomotor Plant 7614
Lumped Plant Models 7614
One Dimension 7615
Three Dimensions 7617
Muscle Pulleys 7617
Eye Movement Models 7617
Final Common Integrator 7618
Saccadic System Functions 7618
Brain Areas and the Lumped Model 7619
Superior colliculus 7619
Oculomotor cerebellum 7619
Neuromimetic Model of the Saccadic System 7620
The Brain Does Not Have a Desired Eye Movement Signal 7622
Further Reading 7623
Olfaction in Invertebrates: Drosophila 7624
Drosophila as a Genetic Model 7624
Anatomy of the Drosophila Olfactory System 7624
Development of the Olfactory System in Drosophila 7624
Odorant-Binding Proteins 7625
Odorant Receptors 7626
Organization and Response Properties of Odorant Receptors 7626
Central Processing of Olfactory Information 7627
Genetic Architecture of Olfactory Behavior 7628
Odorant Recognition and Behavior 7628
Gene Networks That Mediate Olfactory Behavior 7629
Further Reading 7629
Relevant Websites 7630
Olfaction in Invertebrates: Honeybee 7632
Olfactory Receptor Neurons and Glomeruli 7632
Glomerular Activity Pattern and Odor Identity 7632
Neural Processing in the AL 7633
Connecting the ALs with the Mushroom Bodies 7634
Learning-Related Plasticity in the AL 7634
Odor Processing in the MB 7635
Sniffing and Odor Discrimination 7635
Further Reading 7637
Olfaction in Invertebrates: Manduca 7638
Introduction 7638
Natural History 7638
Anatomy of the Olfactory System of Manduca 7638
Olfactory Receptor Cells 7638
The Antennal Lobes 7640
Beyond the Antennal Lobe 7640
Physiology and Behavior 7640
Odor Identification and Discrimination 7640
Sensitivity/Concentration Coding 7643
Temporal Resolution/Inhibition 7644
Conclusions 7645
Further Reading 7646
Olfactory Bulb Anatomy 7648
Laminar Organization of the Main Olfactory Bulb 7648
Neuron Types and Synaptic Organization, Chemical Synapses, and Gap Junctions 7648
Principal Neurons 7648
Local Circuit Neurons 7650
Granule cells 7650
Periglomerular cells 7652
Short-axon cells 7653
Chemical Synapses and Gap Junctions 7656
Centrifugal Afferents 7656
Structure of Nonrodent Mammalian Olfactory Bulbs, with Reference to the Organization of the Insectivore Olfactory Bulb 7656
Further Reading 7658
Olfactory Bulb Mapping 7660
Introduction 7660
Each Olfactory Bulb Contains Two Symmetric Maps 7660
Zonal Organization 7660
Glomeruli as Molecular Feature-Detecting Units 7660
Molecular Features of Odorants 7661
Combinatorial Coding 7661
Molecular Feature Clusters of Glomeruli in the Olfactory Bulb 7662
Molecular Feature Maps 7662
Representation of Basic Odor Quality 7663
Functional Roles of Molecular Feature Maps 7663
Olfactory Cortex Reads the Odor Maps in the Olfactory Bulb 7663
Further Reading 7664
Relevant Websites 7664
Olfactory Bulb Physiology 7666
Introduction 7666
Radial Glomerular Modules 7666
Olfactory Nerve Synapses 7666
Mitral Cell Apical Primary Dendrite 7666
Intraglomerular Microcircuits 7669
Lateral Interglomerular Circuits 7669
Short-Axon Cells in the Glomerular Layer 7669
Dendrodendritic Reciprocal Synapses 7669
Mitral Cell Basal Secondary Dendrites 7671
Granule Cell Dendritic Signal Integration 7671
Functions of Lateral Inhibition 7672
Centrifugal Modulation 7673
Parallel Olfactory Pathways 7674
Circuit Rewiring via Adult Neurogenesis 7674
Further Reading 7674
Olfactory Coding 7676
Introduction 7676
Encoding Olfactory Information at the First Olfactory Relay 7677
Oscillations and Fine Temporal Structure of Spiking in Olfactory Neurons 7677
Slow Temporal Patterning of Olfactory Neuron Responses 7679
Decoding Olfactory Information at Downstream Levels of Processing 7680
Conclusion 7683
Further Reading 7683
Relevant Website 7683
Olfactory Cortex Physiology 7684
Introduction 7684
Circuit Structure 7684
Synaptic Physiology 7684
Sensory Physiology 7685
Functional Implications 7688
Further Reading 7689
Olfactory Cortex: Comparative Anatomy 7690
Introduction 7690
What Is Olfactory Cortex? 7690
Rodent Piriform Cortex 7690
Organization 7690
e9780080446172v8 8859
Front Cover 8859
Encyclopedia of Neuroscience 8860
Copyright Page 8863
Senior Editors 8864
Associate Editors 8866
Table of Contents 8870
Foreword 8876
Preface 8878
Volume 8 8880
R 8880
Rab3 8880
Introduction 8880
Cloning and Structure of Rab3 8880
Rab3 Cycle and the Role of Auxiliary Proteins 8881
Rab3 Function in Membrane Traffic and the Role of the Effectors 8882
Further Reading 8884
Rab3A Interacting Molecules (RIMs) 8886
RIM Genes and Proteins 8886
RIM Discovery and Isoforms 8886
N-Terminal Zinc Finger Domain 8886
Zinc Finger/PDZ Domain Linker Sequence 8886
PDZ Domain 8888
C2 Domains 8888
RIM Function in Synaptic Transmission 8888
Presynaptically Expressed Forms of Long-Term Potentiation 8889
Probability of Release and Short-Term Plasticity 8889
Long-Term Potentiation at Schaffer Collateral to CA1 Synapses 8890
Inhibitory Synaptic Transmission 8890
RIM Proteins Are Critical for Normal Learning and Memory 8890
Overview 8892
Further Reading 8893
Radial Glial Cells: Brain Functions 8894
Introduction 8894
History and Definition 8894
Radial Glial Cells as Neuronal Stem Cells 8895
Role in Neuronal Migration 8895
Dissolution and Transformation 8897
Further Reading 8898
Reaching and Grasping 8902
Introduction 8902
Reaching 8902
Reaching in the Monkey 8902
Reaching in Humans 8903
Neuropsychological evidence 8903
Neuroimaging and transcranial magnetic stimulation evidence 8904
Grasping 8905
Grasping in the Monkey 8905
Grasping in Humans 8905
Neuropsychological evidence 8905
Evidence from neuroimaging and TMS 8906
Further Reading 8907
Reading 8908
The Perceptual Span in Reading 8908
Eye Fixations Reflect Ongoing Cognitive Processing 8909
The Processing of Words 8910
Processing of Syntax and Global Meaning 8912
Models of Eye Movements during Skilled Reading 8912
Summary 8913
Further Reading 8913
Reasoning and Problem Solving: Models 8914
Introduction 8914
Definition and Types of Reasoning 8914
Theoretical Perspectives on Reasoning in the Psychological Literature 8914
Cognitive Architecture 8914
Representation in Reasoning 8915
Mental Models versus Mental Logic 8915
Empirical Evidence on Reasoning from the Neuroscience Literature 8916
Deductive Reasoning 8916
Deductive versus Inductive Reasoning 8917
Problem Solving and Planning 8918
Causal Reasoning 8919
Analogical Reasoning 8920
Summary, Conclusions, and Future Directions 8921
See also 8921
Further Reading 8922
Receptor Trafficking 8924
AMPA-R Trafficking 8924
NMDA-R Trafficking 8925
Conclusion 8926
Further Reading 8926
Recognition Memory 8928
Introduction 8928
Recognition Memory Paradigms 8929
Lesion Studies of Recognition Memory 8930
Electrophysiological Studies of Recognition Memory 8931
Functional Imaging of Recognition Memory 8931
Computational Modeling of Recognition Memory 8932
Further Reading 8932
Red Nucleus 8934
Location and Subdivisions of the Red Nucleus 8934
Species Variation of the Red Nucleus 8934
The RNm 8934
RNm Anatomy 8935
RNm Function 8936
Chronic lesions and reversible inactivation of RNm 8936
Electrophysiological evidence of spinal projections from RNm 8937
Signals recorded from RNm 8937
The Contralaterally Projecting RNpc 8938
RNpc Anatomy 8938
RNpc Function 8939
The Ipsilaterally Projecting RNp 8939
RNp Anatomy 8940
RNp Function 8940
Summary 8940
Further Reading 8940
Referentiality and Concepts in Animal Cognition 8942
Introduction 8942
Referential Communication and Semanticity 8942
The Semiotic Triangle 8943
Thoughts 8943
Symbols 8946
Vocal repertoires 8946
Combinations of calls 8947
Referents 8948
Food discovery 8948
Predator detection 8948
Social events 8949
Conclusion 8949
Further Reading 8950
Relevant Websites 8950
Reflex Circuits 8952
Introduction 8952
The Hierarchical Organization of Spinal Circuits 8952
The Regulator 8952
Pattern Generating Networks 8952
Sensory Feedback Is Multivariable and Context-Dependent 8953
Golgi Tendon Organs 8953
Muscle Spindle Receptors 8953
Cutaneous Receptors 8954
Autonomic Reflex Circuits 8954
Reflexes Are Embedded in Neuromechanical Circuits 8955
Mechanical Component 8955
Neural Component 8956
Modularity 8956
Sensory Feedback Regulates the Mechanical Properties of the Musculoskeletal System and Promotes Coordination and Stability 8956
Reflex Circuits Are Subject to Peripheral and Central Modulation 8957
Further Reading 8958
Regulation of Cell Volume in Neural Cells 8960
Osmosis, Osmotic Pressure, and Steady- State Cell Volume Homeostasis 8960
Water Movement across Plasma Membranes 8960
Physiological and Pathological Perturbations of Cell Volume 8960
Methods of Cell Volume Measurements 8961
Ionic Mechanisms Responsible for Regulatory Volume Decrease in Swollen Cells 8962
Ionic Mechanisms Responsible for Regulatory Volume Increase in Shrunken Cells 8962
Gene Transcription Changes in Response to Cell Volume Alterations 8963
The Cell Volume Sensor 8963
Mechanisms of Volume Signal Transduction 8964
Physiological and Pathological Significance of Cell Volume Regulation in the CNS 8964
Further Reading 8965
Representation of Color 8978
Wavelength and Color 8978
Cone Photoreceptors 8978
Light Coding in Cone Photoreceptors 8978
Cone Opponency: Theory 8978
Cone Opponency: Implementation 8979
Cone Opponency: Relationship to Opponent Colors 8980
Color Processing in the Cortex 8981
Signal Mixing in V1 8981
Color Processing in V1 8981
Color Processing in V2 8982
Color Processing in V4 8982
Color Constancy 8982
Color Processing in MT 8982
Color Processing beyond V4/MT 8983
Conclusion 8983
Further Reading 8983
Representation of Movement 8986
Introduction 8986
Fundamentals of Motion Detection 8986
Psychophysics 8988
Anatomy 8989
Direction Selectivity 8989
Temporal Frequency and Speed Tuning 8990
Spatial Aspects of Receptive Fields 8991
Temporal Aspects of Motion Processing 8992
Higher-Order Aspects of Motion Representation 8992
Conclusion 8993
Further Reading 8993
Representation of Reward 8994
Definition of Reward 8994
Behavior and Behavioral Modeling 8994
Brain Mechanisms for Reward Evaluation 8996
Conclusions 8997
Further Reading 8998
Respiration 9000
Introduction 9000
Fundamental Elements of Ventilatory Control 9000
Breathing Is Automatic and Not Autonomic 9000
Ventilatory Control Processes 9000
Chemoreceptors and Chemoreflexes 9001
Sources of Chemoreceptor Feedback 9001
Central Chemoreceptors 9001
Peripheral Chemoreceptors 9003
Integrated Responses 9003
Time Domains of the Hypoxic Ventilatory Response 9003
Exercise Ventilatory Response: Feed-forward Control 9004
Adaptive Control Strategies: Respiratory Plasticity 9004
Respiratory Long-Term Facilitation following Acute Intermittent Hypoxia 9004
Chronic Intermittent Hypoxia 9006
Ventilatory Acclimatization to Chronic Sustained Hypoxia 9006
Developmental Plasticity in Ventilatory Control 9006
Modulation and Plasticity of the Exercise Ventilatory Response 9007
Age, Sex, and Genetics Influence Ventilatory Control 9007
Disorders of Ventilatory Control 9007
Sleep-Disordered Breathing 9008
Developmental Disorders 9008
Traumatic and Ischemic Neural Injury 9008
Neurodegenerative Diseases 9008
Genetic Diseases 9008
Psychiatric Disorders 9009
Ventilatory Control during Lung Disease 9009
Common Features of Ventilatory Control Disorders 9009
Further Reading 9009
Restless Leg Syndrome 9010
Further Reading 9013
Relevant Website 9014
Reticular Activating System 9016
Introduction 9016
Wiring Diagram 9016
Intrinsic Properties 9017
Ascending Effects 9018
Waking and the 40 Hz Rhythm 9018
Slow-Wave Sleep 9018
Spindles 9019
Delta waves 9019
Slow waves 9019
REM Sleep 9019
Muscle Tone and Locomotion 9019
Neuropharmacology of Sleep and Arousal 9020
Alcohol 9020
Anesthetics and Sedatives 9020
Antihistamines 9020
Stimulants 9020
Development 9021
Arousal and Sleep Disorders 9021
Further Reading 9022
Reticular Formation and the Brain Stem 9024
Histologic Structure 9024
Physiologic Effects of Reticular Cell Activity 9026
Input-Output Patterns 9026
Thalamic Extensions of Reticular Formation 9027
Further Reading 9028
Reticulospinal System 9030
Overview 9030
Anatomy of the Reticulospinal System 9030
Medial and Lateral Reticulospinal Tracts - Origins 9030
Part of the ventromedial system 9030
Laterality and terminations of the medial versus lateral reticulospinal tracts 9031
Medial Reticulospinal Tracts 9031
Lateral Reticulospinal Tracts 9031
Inputs to the Reticulospinal System 9032
Cortical Inputs 9032
Cerebellar Inputs 9032
Inputs for Initiation of Locomotion 9033
Tectal Inputs 9033
Somatosensory Inputs 9033
Auditory Inputs 9033
Functions of the Reticulospinal System 9033
Initiation and Regulation of Locomotion 9033
Preparatory and Anticipatory Aspects of Motor Control 9034
Movements and Muscle Recruitment Evoked by Electrical Stimulation 9034
Lesion Studies 9036
Summary and Implications 9036
Further Reading 9037
Retina: An Overview 9038
Photoreceptors 9038
Retinal Neurons 9039
Cellular Organization 9039
Outer plexiform layer: Horizontal and bipolar cells 9039
Inner plexiform layer: Amacrine and ganglion cells 9040
Ganglion Cells and Receptive Field Organization 9041
Retinal Synapses 9042
Neuronal Responses 9044
Photoreceptors 9045
Horizontal cells 9045
Bipolar cells 9045
Amacrine cells 9045
Ganglion cells 9045
Functional Organization of the Retina 9045
Pharmacology 9047
Conclusion 9048
Further Reading 9048
Retinal Amacrine Cells 9050
Introduction 9050
Amacrine Cell Morphology 9050
Amacrine Cell Neurotransmitters 9051
Amacrine Cell Physiology 9053
Examples of Specific Amacrine Cell Functional Roles 9055
AII Amacrine Cells 9055
Starburst Amacrine Cells 9056
Conclusions 9058
Further Reading 9058
Retinal Bipolar Cells 9060
Further Reading 9065
Retinal Color Mechanisms 9066
Color Vision Varies with Species 9066
Opponent Color and Double Opponent Responses in Fish 9066
Color Vision in Primates 9068
Yellow/Blue Color Vision 9068
Red/Green Color Vision 9070
Color Vision in the Periphery of the Retina 9072
Color Blindness in the Retina 9073
See also 9073
Further Reading 9073
Retinal Development: An Overview 9074
Ontogenesis and Organization of the Vertebrate Retina 9074
Cell Types of the Retina 9074
Proliferation of Retinal Progenitor Cells 9074
Interkinetic Nuclear Migration 9074
Oriented Cell Divisions 9074
Molecular Regulation of Retinal Cell Proliferation 9075
Spatial Control of Retinogenesis 9076
Lineage and Birth Date Relationships 9076
Competency Model for Retinogenesis 9076
Atoh7 and Regulation of Cellular Competence 9077
Postmitotic Cell Migration 9077
Modes of Migration 9077
Importance of Cell Polarity and Basement Membranes 9078
Regulation of Cellular Differentiation 9078
Coordination of Differentiation 9078
Chromatin Remodeling 9079
Cell Type-Specific Differentiation 9079
Protein Trafficking and Cellular Differentiation 9079
Neuronal Process Outgrowth and Synaptogenesis 9080
Cell Adhesion and Synapse Partnering 9080
Conclusions 9080
Further Reading 9081
Retinal Development: Cell Type Specification 9082
Multipotency of Retinal Progenitor Cells 9082
Coordinating Cell Fate and Proliferation 9082
Environmental Factors in Retinal Cell Fate Decisions 9083
Intrinsic Factors in Retinal Cell Fate Decisions 9084
bHLH and Homeodomain Transcription Factors 9084
Mu¨ller glial cells 9085
Bipolar cells 9085
Amacrine cells 9085
Ganglion cells 9085
Photoreceptor cells 9086
Horizontal cell 9086
Asymmetric Cell Divisions in Retinal Cell Fate Decisions 9086
Further Reading 9087
Retinal Ganglion Cells: Anatomy 9090
Introduction 9090
Midget Cells 9091
Parasol and Other Cells with Brisk Transient Responses 9092
Cells Responding Selectively to Short Wavelengths 9094
Other Wide-Field Cells 9095
Conclusions 9095
Further Reading 9096
Retinal Ganglion Cells: Receptive Fields 9098
Introduction 9098
Classification of Retinal Ganglion Cell Types 9098
Receptive Field Modeling 9099
Varieties of Retinal Ganglion Cells 9100
Conclusion 9102
Further Reading 9102
Retinal Glia 9104
Introduction 9104
Retinal Glial Cell Development and Morphology 9104
Muumlller Cells 9104
Astrocytes 9104
Microglia 9104
Glial Induction and Guidance of Retinal Blood Vessels 9104
Retinal Glial Cell Membrane Properties 9105
Ion Channels 9105
Neurotransmitter Receptors 9106
Transporter systems 9106
Calcium Signaling in Retinal Glial Cells 9106
Calcium Waves 9106
Light-Evoked Ca2+ Signaling 9106
Functions of Retinal Glial Cells 9107
Regulation of the Extracellular Microenvironment 9107
Regulation of neurotransmitters 9107
Regulation of pH 9107
Regulation of potassium 9108
Generation of the electroretinogram 9109
Modulation of Neuronal Activity 9109
Inhibition of ganglion cells 9109
D-serine regulation of NMDA receptors 9110
Regulation of Blood Flow 9110
Metabolic and Trophic Support of Neurons 9110
Further Reading 9111
Retinal Horizontal Cells 9112
Morphological Characteristics of Horizontal Cells 9112
Physiological Types of Horizontal Cells 9114
Luminosity-Type Horizontal Cells 9114
Chromaticity-Type Horizontal Cells 9115
Synaptic Transmission between Photoreceptors and Horizontal Cells 9117
Feed-Forward Excitatory Synapse 9117
Feedback Inhibitory Synapse 9117
Receptive Field Properties of Horizontal Cells 9118
Modulation of Horizontal Cell Physiology and Morphology 9119
Dopamine 9119
Nitric Oxide 9119
Retinoic Acid 9121
Functional Roles of Horizontal Cells 9121
Spatial Information Processing 9121
Color Information Processing 9121
Photoreceptor Modulation under Different Lighting Conditions 9122
Further Reading 9122
Retinal Models 9124
Introduction 9124
Unique Advantages of Retinal Models 9124
Differences with Respect to Classical Models 9124
Survey of Retinal Models 9125
Quantitative Models 9125
Linear systems 9125
Nonlinear effects 9126
Linear-nonlinear models 9126
Biophysical Models 9127
Voltage-gated channels 9127
Nonlinear subunits 9127
Direction selectivity 9127
Network Models 9127
Retinal Code 9128
Ensemble Activity 9128
Population codes 9128
Correlations 9128
Models of Light/Dark Adaptation 9129
Quantitative Models 9129
Biophysical Models 9131
Further Reading 9132
Retinal Pharmacology: Inner Retinal Layers 9134
Glutamate 9134
Distinct Glutamate Receptors Mediate Excitatory Light Responses in ON and OFF Bipolar Cells 9134
Glutamate is the Main Excitatory Transmitter of the Inner Plexiform Layer 9135
Synaptic Mechanisms Shape Excitatory Signaling in the IPL 9136
GABA 9137
GABAA and GABAC Receptors 9137
GABAB Receptors 9138
Glycine 9138
Acetylcholine 9139
Dopamine 9139
Neuropeptides 9139
Further Reading 9140
Retinitis Pigmentosa 9142
Further Reading 9146
Relevant Websites 9147
Retinoic Acid Signaling and Neural Patterning 9148
Retinoic Acid Signaling Plays a Role in Patterning of the Posterior Central Nervous System 9148
Spatiotemporal Aspects of RA Signaling in Early Mouse Embryos 9148
RA Is Not Required for Neural Induction 9149
Role of RA in Hindbrain Anteroposterior Patterning 9149
Role of RA in Spinal Cord Dorsoventral Patterning 9150
RA Antagonism of Fgf8 Expression in the Primitive Streak Controls Posterior Patterning 9151
RA Acts in a Paracrine Fashion to Regulate Posterior CNS Patterning 9152
Further Reading 9152
Retinomotor Movements 9154
Nature and Occurrence 9154
Mechanisms of Force Production for Retinomotor Movements 9154
The Photoreceptor Cytoskeleton and Force Production for Elongation and Contraction 9154
The RPE Cytoskeleton and Force Production for Pigment Granule Dispersion and Aggregation 9156
Intracellular Regulation of Retinomotor Movements: The Role of cAMP 9157
Regulation of Photoreceptor Retinomotor Movements by Paracrine Messengers 9157
Regulation of Retinomotor Movements in RPE Cells by Paracrine Messengers 9158
Functions and Significance of Retinomotor Movements 9159
Summary 9159
Further Reading 9160
Retrograde Neurotrophic Signaling 9162
Introduction 9162
Compartmentalized Nerve Cell Chambers Are Used to Study Retrograde Axonal Traffic 9162
Campenot Chamber 9162
Microfluidic Chambers 9162
Studying Retrograde NT Signaling In Vivo 9162
Retrograde Neurotrophic Signaling: Proposed Mechanisms 9163
Signaling Endosome Hypothesis 9163
NGF-Independent Retrograde Signaling 9165
Other Hypotheses 9165
The Nature of Intracellular Vesicles That Carry Retrograde NGF Signaling 9165
Role of MT/Dynein in Mediating Retrograde Transport of NT Signaling 9166
Disrupted Retrograde Transport NT Signaling in Neurodegenerative Diseases 9166
Summary 9167
Further Reading 9167
Retrograde Transsynaptic Influences 9170
Introduction 9170
Retrograde Signaling during Synapse Formation 9170
Synaptogenesis at the Neuromuscular Junction 9170
Synaptogenesis in the Central Nervous System 9172
Target-Dependent Control of Presynaptic Release Probability 9172
Retrograde Signaling and the Homeostatic Modulation of Presynaptic Function 9173
Conclusions 9175
Further Reading 9175
Retronasal Olfaction 9176
Introduction 9176
Definitions of Retronasal Smelling and Retronasal Olfaction 9176
Preliminary definition 9176
Final definitions 9176
Odorants from the Oral Cavity 9176
Sensory Systems for Retronasal Smelling and Retronasal Olfaction 9176
Oral cavity receptors 9176
Nasal cavity receptors 9177
Air and Odorant Movement and Access to Sensory Receptors 9178
Fluid flow 9178
Nasal cavities 9178
Oral cavity 9179
Functional Anatomy of Retronasal Olfaction and Retronasal Smelling 9179
Nasal Cavity Structure 9179
Nasal Cavity Sensory Systems 9179
Olfactory receptors are not permanent 9179
Trigeminal receptors are not replaced 9179
CNS Connections 9179
Olfactory bulb 9179
Trigeminal CNS nuclei 9180
Human Retronasal Responses 9180
Psychophysical Judgments 9180
Thresholds 9180
Identification 9180
Intensity 9181
Adaptation 9181
Interactions 9181
CNS Responses in Humans 9181
Odorant-evoked potentials 9181
Functional magnetic resonance imaging 9182
Clinical Relevance 9183
Further Reading 9183
Relevant Websites 9183
e9780080446172v9 9963
Front Cover 9963
Encyclopedia of Neuroscience 9964
Copyright Page 9967
Senior Editors 9968
Associate Editors 9970
Table of Contents 9974
Foreword 9980
Preface 9982
Volume 9 9984
S 9984
Slow Axonal Transport 9984
Overview 9984
Methods for Studying Slow Axonal Transport 9984
Accumulation Techniques 9984
Pulse-Labeling Techniques 9984
Imaging Techniques 9986
Two Distinct Subcomponents of Slow Axonal Transport 9987
The Kinetics of Slow Axonal Transport 9988
A Brief History of Experimental Studies on Slow Axonal Transport 9988
The Mechanism of Slow Axonal Transport 9990
A Unified Perspective for Fast and Slow Axonal Transport 9991
Furthur Reading 9991
SNAREs 9994
Introduction 9994
SNARE Structure 9994
Evolution of Ideas on SNARE Function 9996
SNAREs and Membrane Fusion 9997
SNARE Interactions with Other Conserved Components of the Fusion Machinery 9998
SNARE Interactions with Specific Components of the Release Machinery 9999
SNARE Specificity 10001
Outlook 10001
Further Reading 10001
Social Brain: Evolution 10004
Explaining Brain Evolution 10004
Theories for the Evolution of Large Brains 10004
Initial Explanations 10004
Asking the Right Questions 10005
Hypotheses for Brain Evolution 10005
Social Complexity 10006
The Nature of Social Cognition 10007
Cognition and the Brain 10007
Further Reading 10008
Social Cognition 10010
Introduction 10010
What Can Behavioral Studies Tell Us? 10010
Neural Activity Associated with Social Interactions 10011
Two Brains, Two Scanners 10012
Conclusions 10012
Further Reading 10013
Social Communication in Whales and Dolphins 10014
Introduction 10014
Vocal Learning 10014
Further Reading 10017
Social Emotion: Neuroimaging 10018
Neuropsychological Evidence for Discrete Neural Networks in Social Emotions 10018
Neuroimaging and Patient Research on Self-Awareness 10019
ToM and the MPFC 10019
Social Emotions and the Amygdala 10020
Social Emotions and the ACC 10020
Self-Conscious Emotions 10021
Imaging Moral Emotions 10021
Conclusions 10022
Further Reading 10022
Social Interaction 10024
Decision Making and Social Interactions 10024
Tasks 10024
Methods 10026
Findings 10027
The Caudate Nucleus 10027
Anterior Insula 10028
Dorsolateral Prefrontal Cortex 10029
Ventromedial Prefrontal Cortex 10029
The Oxytocin System 10029
The Serotonin System 10030
Conclusion 10030
Further Reading 10030
Social Interaction Effects on Reward and Cognitive Abilities in Monkeys 10032
Introduction 10032
Primate Cognition 10032
Properties of Rewards 10032
Number 10033
Timing 10033
Impulsivity 10034
Inhibitory Control 10034
Memory 10035
Theory of Mind 10035
Primate Social Interactions 10036
Mutualism 10036
Kin Selection 10036
Reciprocity 10037
Punishment 10038
The Cognitive Psychology of a Cooperator 10039
Cognitive Constraints on Mutualism and Kin- Biased Cooperation 10039
Cognitive Constraints on Reciprocity and Punishment 10039
Individual recognition 10040
Number, amount, and time 10040
Inhibitory control and impulsivity 10040
Memory 10040
Theory of mind 10040
Conclusions 10041
Further Reading 10041
Social Stress in Adult Primates 10042
Introduction 10042
The Socioeconomic Health Gradient in Humans 10042
Sources of Variability in Health/Social Status Relations in Primates 10043
The Adverse Health Consequences of a Stressful Social Rank in a Primate 10044
Hypersecretion of Glucocorticoids 10044
Cardiovascular Pathologies 10044
Reproductive Impairments 10044
Immune Function 10045
Neurobiological Endpoints 10045
Conclusions 10045
Further Reading 10045
Sodium Channels 10048
Introduction 10048
Sodium Channel Subunit Structure 10048
Sodium Channel Genes 10048
Expression and Localization of Sodium Channel Subtypes 10049
Molecular Basis of Sodium Channel Function 10050
Three-Dimensional Structure of Sodium Channels 10052
Sodium Channel Pharmacology 10052
Sodium Channelopathies 10053
Further Reading 10054
Relevant Website 10054
Somatosensory Cortex 10056
Somatosensory Cortex in Mammals with Little Neocortex 10056
Prosimian Primates 10057
Monkeys, Apes, and Humans 10057
Modular Organization 10059
The Reorganization of Cortical Maps after Injury 10060
Further Reading 10060
Somatosensory Cortex: Functional Architecture 10062
Introduction 10062
Vertical Architecture 10062
Horizontal Architecture 10063
Model Systems of Functional Architecture 10064
Imaging the Functioning Somatosensory Cortex 10065
Cortical Function during Movement 10066
Attention, Distractions, and Goals 10066
Summary 10067
Further Reading 10067
Somatosensory Pathways (Ascending): Functional Architecture 10068
The Anterolateral Quadrant of the Cord 10068
Experimental Findings in Animals 10068
Clinical Findings 10068
The Dorsolateral Funiculi 10069
The Dorsal Columns 10069
Experimental Findings in Animals 10069
Clinical Findings 10070
The Primary Somatosensory Cortex (S1) as a Key Link between Ascending and Descending Somatosensory Pathways 10071
Further Reading 10073
Somatosensory Perception 10074
Introduction 10074
Measures of Spatial Sensitivity 10074
Sensitivity and Site of Stimulation 10074
Measures of Vibratory Sensitivity 10076
Measures of Temporal Sensitivity 10076
Temporal Summation 10076
Temporal Masking 10076
Effects of Aging 10077
Tactile Aids for the Blind and Deaf 10078
Tactile Aids for the Blind 10078
Tactile Aids for the Deaf 10079
Further Reading 10079
Somatosensory Plasticity 10082
Somatosensory Pathway Organization and the Hand 10082
Lesions of the Primary Afferent Neuron 10084
Peripheral Nerve Injuries and Amputations 10084
Dorsal Rhizotomy - Root Cut 10085
Spinal Cord - Dorsal Column Lesions 10086
Behavioral Consequences of Somatosensory Plasticity 10088
Neural Substrates for Reorganization in the Somatosensory Pathways 10091
Pathway Divergence and Disinhibition 10091
Terminal Sprouting and Synaptic Changes 10091
Atrophy, Transneuronal Atrophy, and Degeneration 10092
Neurogenesis? 10092
Further Reading 10092
Somatosensory Receptive Fields 10094
Introduction 10094
Peripheral Receptive Fields 10094
Receptive Fields of Neurons in SI Cortex 10096
Receptive Fields of Neurons in SII Cortex 10100
Conclusions anSummary 10101
Further Reading 10102
Somatostatin and Receptors 10104
Somatostatin 10104
Somatostatin Receptors 10105
Distribution of Somatostatin 10106
Distribution of Somatostatin Receptors 10108
Physiological Roles of Somatostatin 10108
Summary 10109
Further Reading 10110
Sonic Hedgehog and Neural Patterning 10112
Ventralization of Naive Neural Epithelium by Signals from the Notochord and Prechordal Plate 10112
Shh Patterns the Developing Spinal Cord 10112
Shh Is a Morphogen 10112
Shaping the Shh Gradient 10114
The Shh Response 10115
Is Shh Required for Neural Tube Patterning? 10116
Shh and Patterning of the Brain 10118
Small Molecule Inhibitors of Smo 10118
Further Reading 10119
Sound Localization: Neural Mechanisms 10120
Three Main Acoustical Cues to Sound Source Location 10120
Interaural Time Delays 10120
Interaural Level Differences 10120
Monaural Spectral Shape 10122
Neural Processing of Localization Cues in Three Parallel Pathways 10122
ITDs Are Processed in the Medial Superior Olive 10122
ILDs Are Processed in the Lateral Superior Olive 10123
Spectral Shape Cues Are Processed in the Dorsal Cochlear Nucleus 10124
Further Evidence for Processing of Localization Cues in Three Parallel Pathways 10126
Further Reading 10126
Sox Gene Expression 10128
Introduction 10128
Role of SOX Factors in Defining Neural Competence 10128
Role of SOX Factors in the Maintenance of Identity and Differentiation of Neural Progenitor Cells of the Central Nervous System 10129
Role of SOX Factors in the Maintenance and Differentiation of Neural Progenitor Cells of the Peripheral Nervous System 10131
Conclusion 10133
Further Reading 10133
Spasticity 10136
Introduction 10136
Pathophysiology 10136
Definitions 10137
Resolving the Inconsistency 10137
Measurement 10139
Clinical Scales 10139
Biomechanical Methods 10141
Electrophysiological Methods 10143
Treatment 10144
Future Work 10145
Further Reading 10146
Relevant Website 10146
Spatial Cognition 10148
Behavioral Studies of Spatial Cognition in Humans 10148
Spatial Abilities 10148
Multiple Frameworks for Spatial Representation 10148
Neural Basis of Spatial Cognition 10148
Impairments of Spatial Cognition in Humans 10148
Impact of Parietal Lesions in Humans on Spatial Cognition 10148
Impact of Parietal Lesions in Monkeys on Spatial Cognition 10149
Spatial Information Is Encoded in Multiple Reference Frames 10150
Head-centered spatial representation in the ventral intraparietal area 10150
Eye-centered spatial representation in the lateral intraparietal area 10150
Frontal Lobe Mechanisms of Spatial Cognition 10152
Head-centered and hand-centered visual receptive fields in premotor cortex 10152
Object-centered spatial representation in the supplementary eye field 10153
Conclusion 10154
Further Reading 10154
Spatial Cognition and Executive Function 10156
Introduction 10156
Parietal Lobe and Spatial Representations 10157
Anatomical Delineation of Parietal Cortex 10157
Parietal Lobe and Spatial Representations: Evidence from Hemispatial Neglect 10157
Parietal Lobe and Spatial Representations: Evidence from Lesion Analyses 10159
Parietal Lobe and Spatial Representations: Evidence from Functional Imaging Studies 10159
Effects of Spatial Selection: Enhancement of Sensory Signals 10159
Sources of Spatial Orienting Signal 10160
Sources of Nonspatial Orienting Signal 10161
Conclusion 10161
Further Reading 10162
Spatial Cognitive Maps 10164
Introduction 10164
Spatial Strategies 10164
Cue Navigation 10164
Guidance 10165
Routes 10165
Path Integration 10165
Allocentric (Place) Navigation 10165
Exploration and Spatial Cognitive Maps 10166
What Is the Information Stored in Spatial Cognitive Maps? 10166
Configurations of Cues and Geometry 10166
Distal versus Local Landmarks 10167
Metrics and Topology 10167
Neural Bases of Spatial Cognitive Maps 10168
Conclusion 10169
Further Reading 10169
Relevant Websites 10169
Spatial Memory: Assessment in Animals 10170
Introduction 10170
Is Spatial Memory Special? 10170
T-Mazes and 'Place' versus 'Response' Learning 10170
Egocentric and Allocentric Representations of Location 10170
Radial-Arm Mazes: Dissociating Working, Reference, and Associative Memory 10171
The Water Maze 10172
Spatial Manipulations of the Environment 10173
Path Integration and Reorientation Paradigms 10173
Exploration and Novelty 10174
Primate Studies: Object-in-Place Tasks 10174
Translation to Assessment of Human Spatial Memory 10176
Conclusions 10177
Further Reading 10177
Spatial Orientation: Our Whole-Body Motion and Orientation Sense 10178
Introduction 10178
Example 10179
Specific Sense Energy - Semicircular Canals 10179
Specific Sense Energy - Otolith Organs 10180
Vestibular Senses Information Coding 10181
Summary 10183
Further Reading 10183
Spatial Transformations for Eye-Hand Coordination 10186
Introduction 10186
Visual Representations of Reach Space 10186
Gaze-Centered Encoding of Reach Targets 10186
Updating of Spatial Memory 10186
Motor Coding of Reach Movements 10188
Shoulder-Centered Encoding of Reach Plans 10188
Planned Movement Vectors and Kinematics 10190
The Visuomotor Transformation 10190
Comparison between Hand and Target Positions 10190
Reference Frame Transformations 10191
Conclusions 10193
Further Reading 10194
Spectrin: Organization and Function in Neurons 10196
Introduction 10196
Structure 10196
The Spectrin Gene Family 10197
Spectrin Function 10198
Functional Sites in the Spectrin Molecule 10198
Actin Binding Domain 10198
Ankyrin Binding Domain 10198
Intersubunit Interactions 10199
PH Domain 10199
SH3 Domain 10199
Calpain Cleavage Site/Calmodulin-Binding Domain 10199
EF Hand Domain 10200
Distribution of Spectrin in Neurons 10200
Genetic Studies of Spectrin Function in the Nervous System 10200
Invertebrates 10200
Human betaIII Spectrin 10200
Murine betaIV Spectrin 10201
Further Reading 10201
Speech Perception: Adult 10202
Introduction 10202
Units of Speech Perception 10202
Context in Encoding 10202
Speech and Expertise 10204
Categorical Perception 10205
Influences from Other Sources of Information 10206
Theoretical Approaches 10207
Neural Processing 10208
Further Reading 10208
Speech Perception: Cortical Processing 10210
Introduction 10210
The Processing of Intelligible Speech 10211
Phonological Information: Phonological Features 10211
Phonological Information: Phonotactic Structure 10212
Psychological Factors: Categorical Perception 10212
Psychological Factors: Auditory Word Forms 10213
Speech Perception: Production Links 10213
Perception Fields Important in Production 10213
Production Fields Activated in Speech Perception 10214
Summary and Conclusions 10214
Further Reading 10214
Speech Perception: Development 10216
Introduction 10216
Perceptual Abilities at Birth 10216
Learning Language-Specific Sound Categories 10216
Learning Language-Specific Syllable Patterns 10217
Learning about Words 10218
Theoretical Approaches 10219
Challenges 10221
Further Reading 10221
Speech Perception: Neural Encoding 10222
Introduction 10222
Speech Acoustics 10222
Basic Response Properties of Auditory Nerve Fibers 10223
Responses of Auditory Nerve Fibers to Speech 10224
Steady-State Vowels 10224
Time-Varying Stimuli 10226
Representation of Speech by Cochlear Implants 10228
Further Reading 10229
Speech Production: Adult 10230
Introduction 10230
Vocal Tract Dynamics 10230
Measures of Muscle Output 10230
Methods and Studies of Speech Kinematics 10230
X-Ray Tracking of Orofacial Movements 10230
Orofacial Magnetometry 10231
Optical Three-Dimensional Tracking of the Face 10231
Tracking Tongue Movements 10231
Ultrasonic Imaging of the Tongue 10232
Tracking Velar and Laryngeal Movements 10232
Velopharynx 10232
Laryngeal Kinematics 10233
Videokymography 10233
Laryngeal Aerodynamics 10234
Chest Wall Kinematics 10234
Magnetometry 10235
Functional Neural Systems for Speech Motor Control 10235
Further Reading 10237
Speech Production: Development 10238
Introduction 10238
Developmental Anatomy and Physiology of Speech 10238
Methods for Studying Speech Development 10239
Speech Development in Infancy (0- 12 Months) 10241
Perceptual Findings 10242
Instrumental Findings 10244
Speech Development in Toddlers (12- 24 Months) 10245
e9780080446172v10 11213
Front Cover 11213
Encyclopedia of Neuroscience 11214
Copyright Page 11217
Senior Editors 11218
Associate Editors 11220
Contributors 11224
Table of Contents 11290
Foreword 11294
Preface 11296
Volume 10 11296
U 11296
Ubiquitin-Proteasome System and Plasticity 11298
The Ubiquitin-Proteasome Pathway 11298
Ubiquitin Conjugation 11298
Ubiquitin-Conjugating Enzymes: E1, E2, and E3 11298
HECT domain E3s 11299
RING finger E3s 11299
The Proteasome 11300
The catalytic 20S core 11300
19S RC 11300
Deubiquitinating Enzymes 11300
Ubiquitin and Endocytosis 11301
Regulation of the Ubiquitin-Proteasome Pathway 11301
Ubiquitin-Proteasome Pathway and Synaptic Plasticity 11301
Degradation of the R Subunits of PKA 11301
Synaptic Role of DUBs 11302
Role of the Proteasome in Synaptic Plasticity 11303
Presynaptic Role of the Ubiquitin-Proteasome Pathway: Degradation of Synaptic Vesicle Proteins 11304
Postsynaptic Role of the Ubiquitin-Proteasome Pathway: Modulation of Neurotransmitter Receptors, Structural Proteins, an 11304
Future Perspectives 11305
Further Reading 11305
Ultrastructural Analysis of Spine Plasticity 11308
Introduction 11308
Spine Structure and Function 11308
Spine Shape 11308
Localization of Organelles 11308
Postsynaptic Targets 11308
Amplification of Voltage in Spine Head 11308
Sharing of Postsynaptic Potential 11308
Biochemical Compartmentalization 11309
Enhanced Connectivity 11310
Synaptic Activity and Spine Organization 11311
Spine Stability and Turnover 11311
Perisynaptic Astroglia and Spine Structure 11312
Structural Synaptic Plasticity at Dendritic Spines 11312
Long-Term Potentiation 11312
Long-Term Depression 11313
Further Reading 11313
Relevant Website 11314
Ultrastructural Organization of Release Sites in the Calyx of Held 11316
Introduction 11316
Structural and Functional Maturation 11316
Distribution of Synaptic Contacts 11316
Ultrastructure of Synaptic Contacts at the P9 Calyx 11317
Ultrastructural Changes during Postnatal Maturation 11318
Ultrastructural Specializations of the Calyx 11319
Ultrastructure and Function 11320
Number of Releasable SVs 11320
Release Probability 11320
Molecular Composition of the AZ 11320
Comparison with Other Synaptic Contacts 11320
Conclusion 11321
Further Reading 11321
V 11296
Variant Creutzfeldt-Jakob Disease 11322
Introduction 11322
Clinical Features 11322
Clinical Investigations 11323
Neuropathology 11324
Peripheral Pathology 11326
PrPSc Biochemistry 11327
Animal Models for the Study of vCJD 11327
Transmission of vCJD by Blood Transfusion 11328
Current Developments 11328
See also 11329
Further Reading 11329
Relevant Websites 11329
Vascular Issues in Neurodegeneration and Injury 11330
Introduction 11330
Pathology of Vascular Disruption Following TBI 11330
Epidural Hematoma 11330
Subdural Hematoma 11330
Subarachnoid Hemorrhage 11331
Intraparenchymal Hematoma 11331
Alterations in Cerebral Blood Flow Following TBI 11331
Ischemia 11332
Uncoupling of Cerebral Blood Flow and Metabolism 11332
Posttraumatic Vasospasm 11332
Molecular Mediators of Vascular Damage after TBI 11332
Calcium 11333
Prostanoid, Eicosanoid, and Reactive Oxygen Species 11333
Adenosine 11334
Nitric Oxide 11334
Endothelin-1 11335
Neuropeptide Y 11335
Endothelium-Dependent Hyperpolarizing Factor 11335
Genetic Influences/Susceptibility to Vascular Changes after TBI 11335
Apolipoprotein E 11335
Summary 11337
Further Reading 11338
Vasoactive Intestinal Peptide and Pituitary Adenylate Cyclase Activating Peptide Receptors 11340
Structure 11340
Gene Regulation 11340
Mechanism of Action 11340
Receptors 11340
Cell Signaling 11341
Localization 11341
Physiology 11342
Developmental Role 11342
Gastrointestinal Effects 11343
Pulmonary Effects 11344
Cardiovascular Effects 11344
Endocrine System 11344
Immune System 11344
Behavioral Effects 11344
Neuroprotective Effects 11345
Pharmacology 11345
Transgenic Mice 11346
Role in Disease 11346
Therapeutic Potential 11346
Further Reading 11347
Vasopressin/Oxytocin and Receptors 11348
Introduction 11348
The Oxytocin and Vasopressin Peptides 11348
Gene Structures and Evolution 11348
OXT and AVP Gene Regulation and Functional Activity 11349
Pathological Conditions Related to OXT and AVP 11352
Vasopressin and Oxytocin Receptors 11353
Receptor Background 11353
Central Nervous System Distribution 11353
Experimental Approaches 11355
Further Reading 11356
Relevant Website 11356
Vegetative State 11358
Definition 11358
Occurrence, Etiology, and Time Course 11358
Neuropathology 11358
Therapy 11359
Electrophysiological Measures of Cortical Activity 11359
Metabolic Measures of Brain Activity 11359
Vegetative State and Neural Correlates of Consciousness 11360
The Problem of Pain Sensation 11361
Ethical Issues 11361
Further Reading 11363
VelociGene and VelociMouse: High-Throughput Approaches for Generating Targeted Mutations in Mice on a Genome-Wide Scale 11364
Introduction 11364
VelociGene: High-Throughput Gene Targeting in ES Cells 11365
Generating Large Targeting Vectors 11365
Using Large Targeting Vectors to Efficiently Target Mouse ES Cells 11366
VelociMouse: Rapid Generation of Genetically Modified Mice Suitable for Phenotyping 11367
VelociGene and VelociMouse Allow for High-Resolution Localization of Gene Expression, Thus Allowing Targeted Phenotyping for Fu 11368
Vergence Eye Movements 11372
Introduction 11372
The Near Response 11372
The Vergence System 11375
Vergence-Related Cortical Areas 11375
Vergence-Related Subcortical Areas 11377
Midbrain Premotor Neurons 11377
Behavior of Motoneurons 11377
The Accommodation System 11377
The Pupillary Near Response 11378
Further Reading 11381
Vertebrate Eyes: Evolution 11382
Introduction 11382
Structural and Functional Adaptations 11382
Photon Capture 11382
Lenses: Multiple Protein Types and Gene Sharing 11383
Origins of Eyes 11384
Functional Evidence about Eye Evolution 11385
How Did Eyes Evolve? 11386
Further Reading 11386
Vertigo 11388
Introduction 11388
Anatomy and Physiology of the Vestibular System 11388
Physical Examination of Vertigo and Imbalance 11390
Nystagmus and Lesion Localization 11390
Clinical Correlations 11391
Vertigo Lasting Days to Weeks 11391
Vertigo Lasting Minutes to Hours 11391
Vertigo Lasting Seconds 11392
Bilateral Vestibular Loss 11392
Vertigo of Variable Duration: Inner Ear Fistula and Superior Semicircular Canal Dehiscence Syndrome 11392
Inner ear fistula 11392
Superior semicircular canal dehiscence syndrome 11393
Vertigo of Central Origin 11393
Conclusion 11393
Further Reading 11393
Vesicle Pools 11396
The Concept of a Vesicle Pool 11396
Quantitative Treatments of the Readily Releasable Pool Concept 11396
Measurements of RRP Size 11397
RRP Measurement by Repetitive Stimulation 11397
RRP Measurement by Sustained Calcium Elevation 11397
RRP Measurement by Hypertonic Pressure 11397
RRP Measurement by Fluctuation Analysis 11397
On the Agreement between RRP Size Measurements 11399
Replenishment of the RRP 11400
Molecular Arrangement Underlying RRP Vesicles 11400
Other Vesicle Pools 11400
The Reserve Pool 11400
The Recycling Pool 11400
The Immediately Releasable Pool 11401
The Slowly Releasable or 'Reluctant' Pool 11401
The Docked but Unprimed Pool 11401
The High Calcium-Sensitive Pool 11401
The Spontaneously Released Pool 11402
Conclusion: The Pool Concept 11402
Further Reading 11402
Vesicular Neurotransmitter Transporters 11404
Introduction 11404
Vesicular Neurotransmitter Transport Is Driven by a Vesicular Proton Electrochemical Gradient 11404
Vesicular Monoamine Transport Is Mediated by Two Homologous Proteins 11405
The Vesicular Acetylcholine Transporter Is Structurally Related to the Vesicular Monoamine Transporters 11407
Vesicular GABA and Glycine Transport Activities Are Mediated by a Single Protein 11408
Vesicular Glutamate Transporters Define Glutamatergic Neurons 11408
Neuromodulators Are Also Stored in Vesicles and Released through Exocytosis 11409
Summary 11410
Further Reading 11410
Vesicular Sorting to Axons and Dendrites 11412
Neuronal Polarity - Axons versus Dendrites 11412
What Is Neuronal Polarity? 11412
Why Is Neuronal Polarity Important for Neuronal Function? 11412
Compartmentalizing the Plasma Membrane - Multiple Pathways 11412
The Secretory Pathway in Neurons 11413
Basic Features of Secretion 11413
Regulated versus Constitutive Secretion 11413
Endosomal Secretion 11414
Neuronal Adaptations of Secretion 11414
Polarized Membrane Traffic in Epithelial Cells - a Useful Analogy for Neurons? 11414
Mapping of Dendritic and Axonal Targeting Signals 11415
Dendritic Signals 11415
Axonal Signals 11415
A Role for Endosomes in Axonal Targeting Pathways 11416
Molecular Targeting Machinery 11416
Adaptor Complexes 11416
Exocyst Complex 11416
Rab Proteins 11417
Points of Regulation 11417
Further Reading 11417
Vestibular Influences on Cognition 11418
Vestibular Areas in the Cortex 11418
Influence of Body Tilt on Cognitive Tasks 11418
Body Tilt Influences on Visual Perception Tasks 11418
Body Tilt Influences on Mental Imagery Tasks 11419
Studies on mental rotation 11419
The subjective visual vertical 11419
Studies in microgravity 11420
Influence of Whole Body Movement on Cognitive Tasks 11420
Visual-Vestibular Interaction 11421
Further Reading 11421
Vestibular System 11424
Introduction 11424
Vestibular Sensory Organs and Afferents 11424
Otolith Organs 11424
Semicircular Canals 11424
Vestibular Afferents and Efferents 11424
Vestibular Nuclei and Their Projections 11426
Vestibular Reflexes 11427
Vestibulo-ocular Reflexes 11427
Vestibulospinal Reflexes 11427
Plasticity and Adaptability 11428
Further Reading 11428
Vestibulo-Autonomic Responses 11430
Necessity for Vestibulo-Autonomic Responses 11430
Studies of Vestibulo-Cardiovascular Responses in Animal Models 11430
Studies of Vestibulo-Respiratory Responses in Animal Models 11432
Studies of Vestibulo-Autonomic Responses in Humans 11433
Clinical Implications of Dysfunction of Vestibulo-Autonomic Responses 11434
Further Reading 11435
Vestibulo-Ocular Reflex 11436
Rotational or Angular Vestibulo-Ocular Reflex 11436
Translational Vestibulo-Ocular Reflex 11440
Tilt Vestibulo-Ocular Reflex 11441
Plasticity 11441
Neural Pathways 11442
Conclusion: Natural Behavior 11442
Further Reading 11443
Vestibulospinal System and Eye-Head/Neck Movement 11444
Introduction 11444
Anatomical Organization of Vestibulospinal Pathways 11444
Functional Physiology of Vestibulospinal System 11445
Other Descending Pathways Involved in Controlling Head Motion 11446
Biomechanical Comparisons of Eye and Head Movement 11447
Electromyographic Recordings of Neck Muscle Recruitment 11449
Afferent Information from Neck Muscles 11449
Summary 11450
Further Reading 11451
Relevant Websites 11451
Vibrissa Movement, Sensation and Sensorimotor Control 11452
Introduction 11452
Behavior 11452
Whisking 11453
Systems Description of the Sensorimotor Plant 11454
The Follicle 11454
The Mystacial Pad 11454
Brain Stem Loop 11456
Muscles of the Mystacial Pad 11456
Midbrain Loop 11457
Cerebellar Loops 11460
Thalamic-Forebrain Loop 11462
Neocortical Loop 11462
Back to the Brain Stem 11465
Mechanics of the Vibrissae 11465
Transmission of High-Frequency Signals 11465
Sensory Representation of Texture 11466
Sensory Representation of Object Location 11468
Neuronal Signals of Vibrissa Position 11468
Whisking-Dependent Contact Signals 11470
Sensory Modulation of Vibrissa Motion 11472
Brain Stem Mechanisms 11472
Cortical Mechanisms 11472
Epilog 11473
How Do Rats Map the Space about Their Vibrissa? 11473
How Do Rats Change Their Motor Output in Response to Vibrissa-Based Touch? 11473
Further Reading 11474
Viral Vectors in the CNS 11476
Applications of Viral Vectors in the CNS 11476
Viruses Used in CNS Studies 11476
RNA Viruses 11477
Retrovirus 11477
Lentivirus 11478
Alphavirus 11480
DNA Viruses 11480
Herpes virus 11480
Adenovirus 11481
Adeno-associated virus 11481
Experimental Applications for Viral Vectors in the CNS 11481
Modeling CNS Neurodegeneration in Animal Models 11481
Viral Vectors to Understand CNS Development and Organization 11482
CNS Diseases as Potential Targets for Gene Therapy 11482
Parkinson Disease 11482
Alzheimer Disease 11482
Expanded Trinucleotide Repeat Disorders 11483
Inborn Errors of Metabolism 11483
Ocular Diseases 11483
Tumors 11484
Epilepsy 11484
Trauma 11484
Conclusion 11484
Further Reading 11485
Visceral Pain 11486
Introduction 11486
Characteristics of Visceral Pain 11486
Visceral Innervation, Central Terminations, and Projections 11486
Supraspinal Projections 11487
Intrinsic (Enteric) Nerves 11488
Visceral Sensitivity and Hypersensitivity 11488
Mechanosensation and Nociceptors 11488
Sensitization 11489
Mediators and Modulators of Visceral Hypersensitivity 11490
Further Reading 11491
Viscero-Sensory Functions: Capsaicin 11492
Capsaicin as a Tool in Studies of Viscerosensory Function 11492
Capsaicin as a Selective Stimulating Agent 11492
Capsaicin as a Selective Desensitizing Agent 11492
Capsaicin as a Selective Neurotoxin 11492
Molecular Mechanism by which Capsaicin Affects Viscerosensory Functions 11493
Mechanism by which Capsaicin Excites and Sensitizes Visceral Afferent Neurons 11494
Mechanism by which Capsaicin Desensitizes or Kills Visceral Afferent Neurons 11495
Expression of Capsaicin-Sensitive TrpV1 Receptors in Viscerosensory Pathways 11495
TrpV1 Receptors in Extrinsic Visceral Afferent Pathways 11495
TrpV1 Receptors Expressed in Visceral Epithelium Cells 11496
Physiological and Pathophysiological Role of Capsaicin-Sensitive TrpV1 Receptors in Viscerosensory Functions 11496
Functions of TrpV1 Receptors in the Gastrointestinal Tract 11496
Role of TrpV1 in Bladder Function 11497
Role of TrpV1 in the Respiratory Tract 11497
Concluding Remarks 11498
Further Reading 11498
Vision for Action and Perception 11500
Introduction 11500
Functional Models of the Two Visual Streams 11500
The Perception and Action Model 11500
Studies of Neurological Patients 11500
Studies in Nonhuman Primates 11502
Human Neuroimaging 11503
The Operating Principles of the Dorsal and Ventral Streams 11503
Conclusion 11505
Further Reading 11507
Vision: Light and Dark Adaptation 11508
Regimes of Adaptation 11508
Dark Adaptation 11508
Light Adaptation 11510
Rapid Adaptation Change 11512
Electrophysiological Evidence 11512
Further Reading 11513
Vision: Mechanisms of Orientation, Direction and Depth 11514
Primary Visual Cortex 11514
Orientation Tuning 11514
Functional Architecture 11515
Cortical Circuitry Underlying Orientation Selectivity 11516
Direction Selectivity 11517
Cortical Circuitry Underlying Direction Selectivity 11518
The Aperture Problem 11518
Disparity Tuning 11518
Conclusion 11521
Further Reading 11522
Vision: Surface Segmentation 11524
Introduction 11524
Boundary Detection 11524
The Feed-Forward Model of Surface Segmentation 11525
Surface Segmentation in Area V1 11526
Influence of Recurrent Processing 11528
Lesion Studies 11528
Speed of Processing in the Visual System 11528
The Need for Recurrent Processing in Surface Segregation: Disambiguation 11528
The Need for Recurrent Processing in Surface Segregation: Object Identification 11528
Surface Segregation Is Part of a Dynamic Process 11529
Further Reading 11529
Visual Associative Memory 11530
Associative Memory in Vision: An Elementary Model for Declarative Memory Networks 11530
Neuronal Correlates of Associative Memory in the Monkey Inferior Temporal Cortex 11530
Inferior Temporal Neurons Establishing Visual Associative Links 11530
Forward Processing of Long-Term Associative Memory 11531
Retrieval Signaling in Visual Association Memory 11533
Two Types of Sustained Activities in the Delay Period 11533
Active Maintenance of Associative Mnemonic Signaling in the Monkey Inferior Temporal Cortex 11534
Global Network of Memory Retrieval 11534
Automatic Retrieval: Backward Spreading of the Memory-Retrieval Signal in the Temporal Cortex 11534
Active Retrieval: Top-Down Signal from the Prefrontal Cortex in Executive Control of Memory Retrieval 11536
Further Reading 11538
Visual Attention 11540
Selectivity 11540
Spatial Attention 11540
Directing attention into versus out of the receptive field 11540
Differential attentional effects inside the receptive field 11540
Attention can suppress responses 11541
Nonspatial Attention 11541
Feature-based attention 11541
Object-based attention 11543
Modulation 11543
Multiplicative Modulation of Tuning Curves 11543
Nonmultiplicative Consequences of Attention 11543
Saliency 11544
Comparing Response Modulation by Contrast and Attention 11544
Forming an Integrated Saliency Map by Spatial and Feature-Based Attention 11545
Top-Down and Bottom-Up Response Modulation 11546
Conclusion 11546
Further Reading 11547
Visual Cortex in Humans 11548
The Size and Location of Human Visual Cortex 11548
The Location of Primary Visual Cortex 11548
Measuring Visual Field Maps 11549
Anatomical 11549
Functional 11550
The Human V1 Map 11550
Extrastriate Visual Field Maps 11551
Visual Field Maps and Perception 11553
Visual Field Map Clusters 11553
Conclusions 11554
Further Reading 11554
Visual Cortex: Mapping of Functional Architecture Using Optical Imaging 11556
Introduction 11556
Properties of Optical Imaging of Intrinsic Signals 11556
Resolution 11556
Mapping of Multiple Visual Features 11556
Chronic Imaging: Development 11556
Chronic Imaging: Awake Preparation 11557
Combination with Other Methods 11557
Sources of Intrinsic Signals 11557
Functional Architecture of Visual Cortex 11558
Orientation Map 11558
Direction Selectivity 11558
Spatial Frequency 11558
Relationships between Maps 11559
Optimal Coverage 11559
Lateral Connections 11561
Development 11562
V2 11563
Beyond V1/V2 11564
Conclusion 11564
Further Reading 11564
Visual Cortical Models of Orientation Tuning 11566
Introduction 11566
Orientation Selectivity 11566
Feed-Forward Models 11566
Cortical Inhibition 11567
Feed-Forward Inhibition Model 11568
Cortical Excitation and Attractor Models 11568
NYU Models 11568
Untuned Suppression 11570
Spatial Phase in Models and in Experiments, and the Simple/Complex Dichotomy 11570
Gamma Frequency Oscillations in the Local Field Potential and V1 as Dynamical System 11571
Conclusions 11571
Further Reading 11572
Visual Deprivation 11574
Historical Perspective 11574
Normal Development 11574
Abnormal Development 11575
Binocular Deprivation 11575
Monocular Deprivation 11576
Orientation Selectivity 11577
Clinical Conditions 11577
Mechanisms 11578
Critical Period 11578
Competition 11578
Suppression 11579
Sensitivity of Nondeprived Eye 11579
Further Reading 11579
Visual Development 11580
Further Reading 11587
Visual Motion Detection 11588
Local Motion Processing 11588
Global Motion Processing 11588
Neural Structure and Motion Processing 11590
Motion Processing in Visual Cortex 11590
Further Reading 11591
Visual Motion Models 11594
Algorithmic Models of Motion Detection 11594
Cellular Models 11595
Common Properties of Motion Detector Models 11597
Performance of Motion Detectors 11597
Further Processing of Motion Detector Responses 11599
Motion in Two Dimensions 11600
Conclusions 11601
Further Reading 11602
Visual Signaling in Animals 11604
Introduction 11604
Behavioral Visual Signals 11604
Courtship Displays 11604
Parental Behavior and Aggression 11605
Morphological Visual Signals 11606
Colors and Patterns 11606
Enlarged Integumentary Features 11607
Body Size and Symmetry 11607
Extended Phenotypes: Where Morphology and Behavior Meet 11607
Signal Perception 11608
Further Reading 11608
Visual System Development: Invertebrates 11610
Introduction 11610
Evolution of Invertebrate Eyes 11610
Invertebrate Eye Types and Their Development 11611
Evolutionary Divergence among Invertebrate Eyes 11611
Mollusks and Arthropods 11612
Compound Eye Development in Drosophila 11614
The Eye's Connection with Its Visual Centers and Their Development 11615
Axonal Outgrowth and Pathfinding 11616
Synaptic Partner Selection and Synaptogenesis 11617
The Morphogenetic Interdependence of Eye and Visual Centers 11618
Plasticity 11618
Further Reading 11618
Visual System: Adaptive Regression and Progression in Subterranean Mammals 11620
Introduction 11620
Sensory and Brain Adaptations in Subterranean Mammals 11620
Sense Organs 11620
Visual Apparatus 11620
The Mosaic Evolution of the Spalax Eye: Morphology, Physiology, and Molecular Biology 11621
alphaA-Crystallin: Structure, Expression, and Evolution 11624
Adaptive Evolution of Small Heat Shock Protein/alpha B- Crystallin Promoter Activity of the Blind Mole Rat, Spalax ehrenbergi 11624
Retinal Photopigments in Spalax 11624
Coneopsin 11624
Rhodopsin 11624
Melanopsin 11624
Adaptive Loss of Ultraviolet-Sensitive/Violet-Sensitive Coneopsin 11625
The Evolution of Eyes and Photoreceptors 11625
Brain Evolution of Spalax 11626
Conclusions 11626
Prospects 11626
Further Reading 11627
Visual System: Functional Architecture of Area V2 11628
Competing Local versus Global Views 11628
Functional Organization in V2 Is Modular 11629
Are There Functionally Distinct Domains in V2? 11630
Parallel Functional Channels in V2: A Useful Framework? 11633
Surface Properties 11633
Color Representation in V2 11633
Color versus luminance preference domains 11634
Color: Topography of hue in V2 thin stripes 11634
Where is the blue response? 11634
A midlevel role in simultaneous contrast and color constancy? 11635
Brightness Representation in V2 11636
ON and OFF responses 11636
ON and OFF domains in V2 11636
Contrast response in V2: Thin stripes have greater dynamic range 11636
Real and illusory brightness representation in V2 thin stripes 11637
V1 Sees Local, V2 Sees Global 11638
Stereoscopic Depth 11638
Topography for Near-Far Disparity 11639
Orthogonality of Disparity and Orientation 11640
Absolute versus Relative Disparity 11640
Summary 11640
V1 Sees Local, V2 Sees Global 11641
Visual Contours 11641
Cue Invariance 11642
V1 Sees Local, V2 Sees Global 11642
Local versus Global Networks 11643
How Is a Contour-Specific Paired V1-V2 Signal Achieved? 11643
A Competitive Balance 11643
Summary 11644
Further Reading 11645
Visual System: Invertebrates 11648
Introduction 11648
Invertebrate Visual Pigments 11648
General Properties of Visual Pigments 11648
Opsin Evolution, with Special Reference to Invertebrates 11648
Special Features of Invertebrate Visual Pigments 11649
Invertebrate Photoreceptor Cells 11650
Invertebrate Eyes and Visual Optics 11651
Simple Eyes 11651
Compound Eyes 11652
Other Optical Designs 11652
Visual System Properties 11653
Vision in Dim Light 11653
Color Vision 11654
Polarized-Light Vision 11654
Conclusions 11654
Further Reading 11655
Visual System: Multiple Visual Areas in Monkeys 11656
Historical Overview of Visual Cortical Organization 11656
Modern Methods to Study Visual Cortical Organization 11656
Occipital Lobe 11658
Area V1 11658
Area V2 11658
Areas V3 and VP 11660
Area V3A 11660
Area V4 11660
Areas MT, V4t (MTc), MST Complex, and FST 11661
Temporal Lobe 11661
Historical Overview 11661
Posterior ITG 11662
Central and Anterior ITG 11662
Superior Temporal Sulcus 11662
Parietal Lobe 11663
Frontal Lobe 11663
Hierarchical Organization of Visual Cortex 11664
References 11665
Visually Guided Behavior 11666
Introduction 11666
Optic Flow 11666
Controlling Optic Flow 11666
Keeping Still 11666
Compensatory Eye, Head, and Body Movements 11668
Saccadic Locomotion 11670
Using Optic Flow 11670
Shaping Optic Flow 11672
Optic Flow while Tracking Targets 11672
Vision and the Organization of Behavior 11674
Further Reading 11676
Visual-Vestibular Interactions 11678
Introduction 11678
Visually Transduced Information Concerning Self-Motion and Orientation 11678
Vestibularly Transduced Information Concerning Self-Motion and Orientation 11679
Visual-Vestibular Interactions for Determining the Direction of Translation 11680
Visual-Vestibular Interactions for Determining the Magnitude and Velocity of Translation 11681
Visual-Vestibular Interactions for Determining Tilt 11681
Visual-Vestibular Interactions for Determining the Axis of Self-Rotation 11682
Visual-Vestibular Interactions for Determining the Amplitude of Rotation 11682
Suppression of Visual Responses by Vestibular Signals 11683
Suppression of Vestibular Responses by Visual Signals 11683
The Detection of Conflict in Visual- Vestibular Interactions 11684
Conclusions 11684
Further Reading 11684
Vocal Communication in Birds 11686
Introduction 11686
Vocal Learning 11686
Peripheral Mechanisms of Vocal Production 11688
Song Function 11690
Species Recognition 11690
Song matching 11691
Song overlapping 11692
Eavesdropping 11692
Further Reading 11693
Voltage Gated Potassium Channels: Structure and Function of Kv1 to Kv9 Subfamilies 11694
Structure of Kv Proteins 11694
The Fast-Activating Kv Subfamilies 11696
N- and C/P-Type Inactivation of Kv Channels 11707
Kv1 (Shaker) Subfamily 11707
Neuronal Kv1.1-Kv1.6 channels are complexes of Kv1 and Kvbeta subunits 11707
Functional properties of Kv1 channels 11709
Kv1 channels mediate dendrotoxin-sensitive K+ currents 11709
Mutations in the gene encoding Kv1.1 cause episodic ataxia type 1 and epilepsy 11710
Kv1 channels in axons 11710
Kv2 (Shab) Subfamily 11710
Kv2 channels mediate the delayed rectifier current IK 11710
Modulation of Kv2.1 channels 11712
Kv3 (Shaw) Subfamily 11712
Functional roles of Kv3 channels 11712
Kv3 channels and neurotransmitter release 11714
Mutations in Kv3.3 channels cause spinocerebellar ataxia 11714
The Kv4 (Shal) Subfamily 11714
Kv4 channels use novel inactivation mechanisms 11715
Auxiliary subunits 11716
Modulation of Kv4 channel function by phosphorylation 11717
Kv7 (KCNQ) Channels 11718
Structural Features of Kv7 Pore-Forming Subunits 11718
Subunit Assembly of Kv7 Proteins 11718
Expression and Function of Kv7 Channels: The 'M' Current 11718
Diseases Associated with Kv7 Channels 11720
KCNQ1 and LQTS/JLNS 11720
KCNQ2 and KCNQ3 in neonatal epilepsy 11720
KCNQ4 and inherited deafness 11720
Modulation of Kv7 Channels 11721
Further Reading 11722
Relevant Website 11722
Voltage-Gated Calcium Channels 11724
Native Voltage-Gated Calcium Channels 11724
alpha1 (Cav) Subunits 11724
beta Subunits 11726
alpha2delta Subunits 11727
gamma Subunits 11728
Low-Voltage-Activated (T-Type) Calcium Channels: Cav3.1-Cav3.3 11729
Cav3.1 Subunit: CACNA1G Gene 11729
Cav3.2 Subunit: CACNA1H Gene 11729
Cav3.3 Subunit: CACNA1I Gene 11732
High-Voltage-Activated Calcium Channels 11732
L-Type Calcium Channels: Cav1.1-Cav1.4 11732
Cav1.1 Subunit: CACNA1S Gene 11733
Cav1.2 Subunit: CACNA1C Gene 11733
Cav1.3 Subunit: CACNA1D Gene 11733
Cav1.4 Subunit: CACNA1F Gene 11734
P/Q-Type Channel - Cav2.1 Subunit: CACNA1A Gene 11734
N-Type Channel - Cav2.2 Subunit: CACNA1B Gene 11735
R-Type Channel - Cav2.3 Subunit: CACNA1E Gene 11735
Regulation of Calcium Channel Activity - Interacting Proteins 11736
Further Reading 11738
Voltage-Gated Potassium Channels (Kv10-Kv12) 11740
Introduction 11740
The Kv10 (EAG) Subfamily 11741
The Kv11 (ERG) Subfamily 11742
Human Kv11.1/ERG1 and Cardiac Excitability 11742
hERG1 Gating in the Cardiac Action Potential 11743
hERG1 Activation and Deactivation 11744
hERG1 Inactivation Mechanisms 11744
Mechanisms of hERG1 Drug Block 11744
Modulation of Gating by the N-Terminus 11745
Two hERG1 Subunits Contribute to IKr 11745
hERG Channels and Neuronal Function 11745
The Kv12 (ELK) Subfamily 11746
The Future: Functional Roles of Kv10-12 Channels in the Nervous System 11746
Further Reading 11747
Vomeronasal Accessory System 11750
The Accessory Olfactory System 11750
Basic Anatomical Organization of the VNO 11750
Stimulus Detection Strategies 11750
Diversity of Chemosignals Detected by the VNO 11752
VNO Signal Transduction: Transient Receptor Potential Channels and Phosphoinositide Signaling 11753
Functional Organization of the AOB 11754
VNO Sensing and the Modification of Behaviors 11755
Conclusion 11755
Further Reading 11756
Relevant Websites 11756
Vomeronasal System Evolution 11758
Introduction 11758
History 11758
Distribution across Vertebrates 11758
Morphological Diversity 11758
The Vomeronasal Organ 11758
The Accessory Olfactory Bulb 11759
Glandular Apparatus 11760
The Capsule 11761
The Receptor-Free Epithelium 11762
The Vomeronasal Nerves and Paravomeronasal Ganglia 11763
Development 11763
Vomeronasal Organ 11763
Do Humans Have a Vomeronasal Organ? 11763
Evolutionary Patterns 11764
Structural Diversity 11764
Variations of the Vomeronasal System 11765
Conclusions 11766
The VNO in Extant Tetrapods 11766
An Elusive Ancestral Function 11766
Further Reading 11767
Relevant Website 11767
Voxel Based Morphometry 11768
Introduction 11768
Preparing the Data 11768
Segmentation 11768
Spatial Normalization 11769
Jacobian Adjustment 11769
Smoothing 11770
Statistical Modeling and Inference 11770
Global Normalization and Other Confounds 11772
Inference 11773
VBM in Clinical Research 11774
Further Reading 11774
W 11296
Walking in Invertebrates 11776
Introduction 11776
Gaits 11776
Neural Control 11777
Generating Rhythmic Movement 11777
Coupling Rhythmic Generators 11778
Sensory Feedback and Rhythm Generation 11779
Control of Walking 11779
Modulation of Walking 11780
Practical Ramifications 11780
Further Reading 11781
Wallerian Degeneration 11782
Introduction 11782
Morphologic Changes during Wallerian Degeneration of Peripheral Nerve 11782
Axonal Changes Following Nerve Transection 11782
Schwann Cell Changes Following Nerve Transection 11783
Macrophage Recruitment and Action Following Nerve Transection 11784
Neuronal Regenerative Responses Following Nerve Transection 11784
Molecular Alterations Occurring during Wallerian Degeneration of Peripheral Nerve 11785
A Comparison of Wallerian Degeneration in the PNS and CNS 11786
Recent Findings Indicating that Axonal Degeneration Results from Active Self- Destruction Rather than Simple Atrophy of Severed 11787
Further Reading 11788
Wilson's Disease 11790
Pathogenesis 11790
Clinical Picture 11791
Treatment and Perspectives 11792
Further Reading 11792
Wnt Pathway and Neural Patterning 11794
Introduction 11794
Secretion of the Wnt Protein 11794
Canonical Pathway - Wnt Receptors and Alternative Ligands 11794
Canonical Pathway - Events in the Cytosol 11795
Canonical Pathway - Events in the Nucleus 11796
The Canonical Pathway in Xenopus Axis Specification 11796
Wnt Signaling in Synapse Development - Divergent Pathways and Diverse Mechanisms 11796
Wnt Signaling and Ca2 11798
Summary 11798
Further Reading 11799
Word Learning 11800
Defining the Problem 11800
Word Learning across Development 11801
Word Learning as Induction 11802
Constraints and Biases on Hypothesized Meanings 11802
Social Cues to Reference 11803
Sentential Contexts as Cues to Word Meanings 11804
Final Words 11804
Further Reading 11805
Word Production 11806
Introduction 11806
The Functional Architecture of Word Production 11806
Conceptual Preparation 11806
Lexical Processing 11807
Phonological Processing 11808
Self-Monitoring 11810
Information Flow in the Functional Architecture: Modularity versus Interactivity 11810
Neural Correlates of the Functional Architecture 11810
Summary and Future Directions 11811
Further Reading 11813
Word Recognition 11814
Factors That Influence Word Recognition 11814
Frequency 11814
Neighborhood Effects 11814
Mapping from Spelling to Sound in Visual Word Recognition 11815
Word Recognition Influences Lower Levels of Processing 11815
Phoneme Restoration and the Ganong Effect 11815
The Reicher-Wheeler Effect and 'Interactive Activation' 11816
Word Recognition Models and Controversies in Cognitive Psychology and Neuroscience 11816
Interactive Processing with Feedback or Autonomous, Feed-Forward Processing? 11816
'Words and Rules' or 'Constraint Satisfaction'? 11817
Neuroanatomy of Word Recognition 11818
Superior Temporal Gyrus and Superior Temporal Sulcus 11818
Inferior Frontal Gyrus 11818
The 'Visual Word Form Area' 11818
Summary 11819
Further Reading 11819
Working Memory: Capacity Limitations 11820
Working Memory System 11820
Capacity Limits: Central or Modality-Specific? 11820
Overview and Approach 11820
Verbal Working Memory Capacity - Memory Span Tasks 11820
Chunking of Information 11821
Phonological Coding of Verbal Information 11821
Visual Working Memory Capacity: Whole Report 11821
Visual Working Memory Capacity: Features and Objects 11822
Units of Capacity: Objects or Information Load? 11822
Neural Measures of Working Memory Capacity 11823
Neuroimaging 11823
Electrophysiological measures 11824
Individual Differences in Working Memory Capacity 11825
Intelligence and Working Memory Capacity 11825
Attentional Control and Working Memory Capacity 11826
Further Reading 11828
Writer's Cramp 11830
Background 11830
Clinical Presentation 11830
Demographics 11830
Clinical Features 11830
Differential Diagnosis 11830
Etiology 11831
Environmental factors 11831
Genetic factors 11831
Diagnostic Workup 11831
Pathophysiology 11831
Motor System 11831
Task specificity 11831
Increased excitability 11831
Abnormal plasticity 11831
Decreased inhibition 11832
Motor changes as an endophenotype 11832
Sensory System 11832
Clinical and subclinical sensory impairment 11832
Abnormal cortical sensory representation 11832
Increased excitability and reduced inhibition 11832
Abnormal sensorimotor integration 11832
Sensory changes as an endophenotype 11833
Prognosis and Treatment 11833
Behavioral Changes 11833
Oral Medications 11833
Botulinum Toxin Injections 11833
Surgical Treatment 11833
Disease Modification 11833
Further Reading 11834
Relevant Websites 11834
Z 11296
Zoster and Postherpetic Neuralgia 11836
Herpes Zoster 11836
Historical Background 11836
Incidence 11836
Pathophysiology 11836
Clinical Symptoms 11837
Physical Exam 11837
Therapy 11837
Topical applications 11837
Symptomatic treatment 11837
Antivirals 11837
Regional anesthetics and corticosteroids 11837
Postherpetic Neuralgia 11838
Definitions 11838
Incidence 11838
Disease Course 11838
Pathophysiology 11838
Preventing Conversion from Acute Herpes Zoster to Postherpetic Neuralgia 11838
Management of Chronic Cases 11838
Topical applications 11838
Antidepressant medications 11838
Tricyclic antidepressants 11838
Selective serotonin reuptake inhibitors versus selective norepinephrine reuptake inhibitors 11839
Anticonvulsant medications 11839
Opioid medications 11839
Transcutaneous electrical nerve stimulation 11839
Regional blocks 11840
Surgical treatment 11840
Rhizotomy of the dorsal root entry zone 11840
Cryotherapy 11840
Spinal cord stimulation. 11840
Alternative medicine 11840
Acupuncture 11840
Herbal therapy 11840
Conclusions 11840
Further Reading 11841
Subject Index 11842