1. The greater tubercle projects as the most lateral structure of the humeral head. 2. Tendinous fibers extend to the greater tubercle with insertions into the bicipital groove. 3. The supraspinatus tendon is inserted into the superior facet of the greater tubercle of the humerus. 4. The humerus of the upper arm has two tubercles, the greater tubercle and the lesser tubercle. 5. Such a tear usually occurs at its point of insertion onto the humeral head at the greater tubercle . 6. The supraspinatus muscle fans out in a horizontal band to insert on the superior and middle facets of the greater tubercle . 7. The infraspinatus and teres minor insert on the greater tubercle , and work to laterally, or externally, rotate the humerus. 8. This capsule is strengthened by the coracohumeral ligament which attaches the coracoid process of the scapula to the greater tubercle of the humerus. 9. All three of the muscles that attach to the greater tubercle are part of the rotator cuff, a muscle group that stabilizes the shoulder joint. 10. The fourth muscle of the rotator cuff ( the subscapularis ) does not attach to the greater tubercle , but instead attaches to the lesser tubercle.
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