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The Gastrocnemius, An issue of Foot and Ankle Clinics of North America, E-Book

The Gastrocnemius, An issue of Foot and Ankle Clinics of North America, E-Book

Mark S. Myerson

(2014)

Additional Information

Abstract

The Gastrocnemius is the largest and most superficial of calf muscles and the main propellant in walking and running. This issue of Foot and Ankle Clinics will cover everything from the anatomy and biomechanics to surgical techniques.

Table of Contents

Section Title Page Action Price
Front Cover Cover
The Gastrocnemius i
Copyright ii
Contributors iii
Contents vii
Foot And Ankle Clinics\r xi
Foreword xiii
Preface xv
Dedication xvii
Dedication xix
Dedication xxiii
Anatomy of the Triceps Surae 603
Key points 603
Introduction 603
Triceps surae 604
Gastrocnemius 604
Medial head 604
Lateral head 604
Plantaris 606
Soleus 607
Calcaneal Tendon 610
Innervation 614
Function of the Triceps Surae 614
Achilles-Calcaneal-Plantar System 616
Plantar Aponeurosis 617
Medial component 618
Lateral component 618
Central component 619
Surgical anatomy 620
Level 5 622
Level 4 624
Level 3 625
Levels 2 and 1 631
Summary 631
Acknowledgments 631
References 631
The Gastrocnemius 637
Key points 637
Introduction 637
A limited review of literature 638
The origins of the calf contracture 639
Activity changes: lifestyle influences 641
General Decreased Activities as People Age 641
Recent Changes in Activities 641
Athletes and Increased Activity Situations 641
Physiologic changes to muscles and tendons: internal influence 641
Genetics 641
Reverse evolution: the human influence and the predilection pattern 642
The Perfect Foot 642
The Gastrocnemius: Cause and Effect 643
Discussion 643
Summary 644
Acknowledgments 645
References 645
Effects of Gastrocnemius Tightness on Forefoot During Gait 649
Key points 649
Introduction 649
Anatomy and physiology of the gastrocnemius muscle 650
Anatomy 650
Hill Model 650
Energy Considerations 650
Normal gait analysis 650
Kinematics of the Stance Phase 650
Dynamics of the Stance Phase: Ground Reaction Studies 652
Ground reaction and center of gravity 653
Center of pressures 653
Electromyographic Analysis 653
Combined Analysis of Kinematics Dynamics and Electromyography 653
Discussion 654
Summary 655
References 656
Clinical Diagnosis of Gastrocnemius Tightness 659
Key points 659
Introduction 659
Clinical examination: the Silfverskiold test 659
The Force Under the Foot Is Applied 660
Correction of Hindfoot Valgus Deformity 660
Correction of an Eventual Contraction of the Foot Extensors 660
Strength Applied, and Definition of Gastrocnemius Tightness 660
The Taloche Sign (Maestro) 666
Clinical examination: the associated signs caused by the equinus 666
Summary 666
References 666
Functional Hallux Rigidus and the Achilles-Calcaneus-Plantar System 669
Key points 669
Introduction 669
Functional hallux rigidus of biomechanical origin: the influence of equinus contracture 670
Sagittal Plane Block and Compensatory Mechanisms 675
The Achilles-Calcaneus-Plantar System During the Gait Cycle 678
Relationship Between the Degree of Equinnus and the Resulting Pathology 679
Clinical examination and diagnosis 681
Treatment of functional hallux rigidus 690
Summary 696
References 697
The Effect of the Gastrocnemius on the Plantar Fascia 701
Key points 701
Introduction 701
Achilles–calcaneus–plantar system 702
Modeling the foot in the sagittal plane 703
Gastrocnemius tightness and clinical applications 710
Summary 713
Acknowledgments 713
References 713
Gastrocnemius Shortening and Heel Pain 719
Key points 719
Background 719
Management of heel pain 720
Achilles tendinopathy 721
Terminology in Achilles tendon pain 721
Local anatomy 721
Demographics 721
Examination 722
Insertional tendinopathy 723
Retrocalcaneal bursitis 723
Noninsertional tendinopathy 723
Imaging 723
Treatment 723
Nonoperative Treatment 723
Stretching 723
Plantar fasciopathy 724
Examination 724
Imaging 725
Treatment 726
Gastrocnemius contracture 727
Pathomechanics of Calf Contracture 727
Clinical and epidemiologic data 728
Operative treatment 729
Gastrocnemius lengthening surgery 729
Results of gastrocnemius lengthening 731
Gastrocnemius lengthening for recalcitrant heel pain 731
Proximal medial gastrocnemius release for Achilles tendinopathy 732
Summary 733
References 733
The Use of Ultrasound to Isolate the Gastrocnemius-Soleus Junction Prior to Gastrocnemius Recession 739
Key points 739
Introduction 739
Procedure 740
Discussion 740
Summary 742
References 742
Surgical Techniques of Gastrocnemius Lengthening 745
Key points 745
Introduction 746
Anatomic basis 746
Indications 746
Surgical techniques 748
Proximal Gastrocnemius Recession Techniques 749
Traditional medial and lateral gastrocnemius muscle release: the Silfverskiold procedure 749
Isolated medial gastrocnemius release: a Barouk modification 750
Midaspect Gastrocnemius Recession Techniques 750
The Baumann procedure 750
Distal Gastrocnemius Recession Techniques 753
The original Vulpius and Baker procedures 753
The Strayer procedure 753
The modified Strayer procedure (author’s preferred technique) 753
Endoscopic distal gastrocnemius recession 756
Postoperative care 758
Outcomes 759
Complications 761
Summary 762
References 763
Gastrocnemius Recession 767
Key points 767
Background 767
Anatomy 768
Arch collapse 768
Outcomes 770
Grand Rapids Type I Outcomes 770
Grand Rapids Type II Outcomes 771
Grand Rapids Type III Outcomes 773
Grand Rapids Type IV Outcomes 774
Type V Deformity 776
Techniques 776
Silfverskiold Procedure 777
Baumann Procedure 780
Strayer Procedure 782
Hoke (Tendoachilles Lengthening) Procedure 784
Summary 785
References 785
Endoscopic Gastrocnemius Release 787
Key points 787
Introduction 787
Surgical technique 788
Results 792
Future directions 792
Summary 792
References 793
Technique, Indications, and Results of Proximal Medial Gastrocnemius Lengthening 795
Key points 795
Introduction 795
Indications for Proximal Gastrocnemius Release 796
Surgical Technique 797
Preparation 797
Discussion 801
Bilaterality 801
Five Reasons to Lengthen Just the Medial Gastrocnemius 801
Reasons to Prefer Proximal Versus Distal Lengthening 802
Final Points 803
Chronology 803
Patient information 804
Summary 804
References 804
The Effect of Gastrocnemius Tightness on the Pathogenesis of Juvenile Hallux Valgus 807
Key points 807
Introduction 807
Anatomy 808
The Plantar Aponeurosis 808
Distal insertion 808
Pathogenesis of hallux valgus deformity in relation to gastrocnemius tightness 809
Role of Reduced Dorsiflexion of the Metatarsophalangeal Joint 810
In hallux limitus 810
Dorsal flexion of the interphalangeal joint 811
In juvenile hallux valgus 811
Summary 813
Problems Associated with the Planovalgus Foot 814
Spastic Paraplegia in Children 814
Relationship between gastrocnemius tightness and juvenile hallux valgus 814
Discussion 815
Elements Increasing the Deformity 816
Specific Structural Abnormalities 816
Clinical Consequences 817
Correction of hallux valgus and gastrocnemius tightness 817
Gastrocnemius Tightness 817
Bunionectomy 818
Our Series 818
Summary 819
Acknowledgments 820
References 820
Index 823