The rotator cuff muscles, particularly their tendons, are the main stabilizers of the shoulder joint, along with intrinsic ligaments like the coracohumeral and glenohumeral ligaments.
The primary structure that primarily stabilizes the shoulder joint is the rotator cuff, specifically the tendons of muscles forming the rotator cuff. These muscles include the supraspinatus, infraspinatus, teres minor, and subscapularis. Additionally, intrinsic ligaments like the coracohumeral ligament and glenohumeral ligaments offer some support for the shoulder joint.
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