1 / 29

Understanding Shoulder and Elbow Anatomy for Optimal Movement

Study methods for learning about shoulder and elbow joints, muscles, and movements. Includes information on impingement syndrome, muscles involved, and treatment options. Illustrative diagrams and review exercises provided.

chad
Télécharger la présentation

Understanding Shoulder and Elbow Anatomy for Optimal Movement

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Method of Study for This Section • Read assigned readings of text • Use text readings and the Dynamic Human CD-ROM to help review structure of bones, joints, and muscles as necessary. This is the purpose of labs • Complete labs conscientiously and study models of articulated skeleton, shoulder, spine, and knee • Lecture will only provide a selective review of structure, muscles & movements. Focus will be on muscular analysis of movements and exercises and movement-related issues, such as common injuries. • For exams, review lecture notes and understanding questions in both lecture and labs

  2. Sh Jt & Girdle Ant Musculature

  3. Sh Jt & Girdle Post Musculature

  4. Upper Extremity – Chapter 7 Shoulder Girdle Structure:

  5. Elevation and Depression

  6. Upward & Downward Rotation

  7. Protraction & Retraction

  8. Shoulder Joint Structure

  9. Shoulder Joint Stabilizers • Stabilizers and rotators - Rotator cuff muscles – (Fig 7-5) • Teres minor - external rotation • Infraspinatus - external rotation • Supraspinatus - abduction • Subscapularis - internal rotation

  10. Shoulder Joint Primary Movers • Vector representation of muscle forces • Anterior movers – (Fig 7-13) Anterior deltoid, pectoralis major • Superior movers - middle deltoid (Fig 7-11) • Posterior movers - posterior deltoid (Fig 7-14) • Inferior movers - latissimus dorsi, teres major, lower pectoralis m. (Fig 7-10, 7-12)

  11. Shoulder Jt Muscles

  12. Synergism of prime movers and rotator cuff muscles during arm abduction

  13. Shoulder Joint Impingement Syndrome • What is it? Pain from shoulder area resulting from impingement of structures between humeral head, acromion, and coracromial arch. Three stages: • Stage I - edema and hemorrhage of subacromial structures • Stage II - tendon fibrosis and bursal thickening • Stage III - rotator cuff tears, biceps tendon ruptures, and bone spurs II: III: I:

  14. Sh Jt Impingement (2) • Good website: MMG - Patient Education Impingement Syndrome • Causes • Primary impingement: • Repeated movements requiring elevated and/or medially rotated humerus, compounded by weak rotator cuff muscles, causing: impingement of long head of biceps, supraspinatus • Secondary Impingement: • Decreased volume of subacromial space due to glenohumeral joint instability, and perhaps joint capsular tightness • Structural abnormalities: • hooked or curved acromion, calcium deposits, bone spurs, thickened bursa, thickened ligaments

  15. Shoulder Jt Impingement (3) • Treatment: • Related to the cause - may involve surgery, rotator cuff strengthening, and flexibility exercises. • Later, avoid humeral elevation and rotation movements.

  16. Elbow Joint Structure

  17. Muscles of elbow joint:

  18. Elbow and Wrist Joint Muscles • True Flexor - Brachialis • Flexor-Supinator - Biceps brachii • Extensor - Triceps brachii • Wrist flexors (medial epicondyle of humerus) • Flexor carpi ulnaris and flexor carpi radialis • Wrist extensors (lateral epicondyle of humerus) • Extensor carpi ulnaris & extensor carpi radialis KIN 330 Biomechanics

  19. Muscles of elbow joint:

  20. Radioulnar Jt Muscles

  21. Muscles and Movements of Radioulnar Joint • Elbow Flexion - • Forearm Supination - Biceps Brachii • Forearm Pronation - Pronator Teres • Elbow Extension - • Forearm Supination - Supinator • Forearm Pronation -Pronator Quadratus • Epicondylitis • The most common cumulative trauma disorder (CTD), repetitive stress injury (RSI), repetitive motion disorder (RMD), or overuse syndrome (OS) is epicondylitis • Epicondylitis website: • MMG - Patient Education Cumulative Trauma Disorders TOC

  22. Radioulnar Jt Muscles

  23. Bones of Wrist and Hand

  24. Carpal Tunnel Syndrome • Background MMG - Patient Education Cumulative Trauma Disorders TOC Carpal tunnel includes median nerve and 9 flexor tendons ( 4 flex dig sup, 4 flex dig prof, 1 fl pol l)

  25. Carpal Tunnel Syndrome (cont’d) • Symptoms • Pain in wrist area, or referred proximally or distally • Tingling of thumb, fingers, or palmar side of hand • Loss of control of muscles affected by median nerve blockage • Causes • Enlargement of tissues within tunnel • Decreased size of tunnel • Extraneous tissue in tunnel • Treatment • Related to cause • Website for prevention of repetitive stress injury at computer workstations: CUergo: Neutral Posture Typing KIN 330 Biomechanics

  26. Review Problems for Chapter 7 • Torque at shoulder with elbow flexed vs extended • Fig 7-15, 7-16 • Compressive force at shoulder jt • Fig 7-17, sample problem 1 • Elbow flexion force • Figure 7-26, sample problem 2 • Introductory problems, p 217: 5,6,8,9 • Additional problems, p 217-218: 5,10

  27. Compressive force at shoulder joint

  28. Elbow flexor tension and Joint compressive force

More Related