Shoulder - deep dissection of a right shoulder girdle, preserving a complete scapula, lateral clavicle, and proximal humerus
This 3D printed specimen preserves a deep dissection of a right shoulder girdle, consisting of a complete scapula, lateral clavicle, and proximal humerus. In the anterior view, the subscapularis muscle is present but sectioned to highlight the cross-sectional thickness of the belly within the subscapular fossa. The coracoclavicular ligament and coracoacromial ligaments lie just medial to the insertions of the coracobrachialis and pectoralis minor muscles on the coracoid process of the scapula. The insertion of the tendon of the latissimus dorsi is covered by the tendon of the long head of the biceps brachii muscle passing in the bicipital groove towards the glenohumeral joint capsule. The capsule has been opened anteriorly to expose the passage of this tendon, as well as the suprapinatus muscle (covered by the collapsed subdeltoid bursa). In the posterior view the supraspinatus muscle is preserved while the infraspinatus and teres muscles have been removed to expose the posterior glenohumeral joint capsule. The terminal insertions of the long head of the triceps brachii, infraspinatus, and teres minor muscles are all preserved.