Shoulder, Part IV: The Rotator Cuff Teardown
The “rotator cuff” is a set of four muscles around the glenohumeral joint including the supraspinatus, infraspinatus, subscapularis, and teres minor (see figure). These muscles all originate from the scapula, insert at various points on the humerus, and serve multiple coordinated functions including abduction, adduction internal rotation, external rotation, and stabilization. Each muscle is considered …