Anatomy of the Shoulder

6. This ligament helps stabilize the shoulder joint by preventing excessive anterior translation of the humeral head.
8. This large muscle covering the upper back is divided into upper, middle, and lower fibers.
10. This rotator cuff muscle assists in initiating arm abduction.
15. This muscle works with the latissimus dorsi to extend, adduct, and internally rotate the arm.
17. This muscle elevates the scapula and is named for its function.
19. This deep back muscle group retracts the scapula and consists of major and minor portions.
20. This small rotator cuff muscle is responsible for external rotation of the shoulder.
21. This rotator cuff muscle is responsible for shoulder internal rotation.
22. This ligament connects both clavicles across the top of the sternum, aiding in clavicular stabilization.
23. This ligament is divided into conoid and trapezoid portions and plays a crucial role in preventing vertical displacement of the clavicle.
24. This three-headed muscle extends the elbow.

1. This two-headed muscle flexes the elbow and assists in shoulder flexion.
2. This deep muscle originates on the coracoid process and helps flex and adduct the arm.
3. This head of the biceps brachii originates from the supraglenoid tubercle.
4. This muscle runs along the ribs and helps protract the scapula.
5. This large, triangular muscle covers the shoulder and is responsible for arm abduction.
7. This ligament runs between the first rib and the clavicle, limiting excessive elevation of the clavicle.
9. This chest muscle has upper and lower fibers and plays a role in shoulder flexion and adduction.
11. This small chest muscle lies beneath the pectoralis major and helps stabilize the scapula.
12. This ligament forms an arch over the humeral head, helping to prevent superior displacement of the shoulder joint.
13. This rotator cuff muscle assists with external rotation and is located below the supraspinatus.
14. This strong ligament reinforces the joint where the clavicle meets the sternum, aiding in stability of the shoulder girdle.
16. This broad back muscle extends, adducts, and internally rotates the humerus.
18. This head of the triceps originates from the infraglenoid tubercle of the scapula.