The infraspinatus and teres minor fuse near their musculotendinous junctions, while the supraspinatus and subscapularis tendons join as a sheath that surrounds the biceps tendon at the entrance of the bicipital groove.
32.
The infraspinatus and subscapularis have significant roles in scapular plane shoulder abduction ( scaption ), generating forces that are two to three times greater than the force produced by the supraspinatus muscle.
33.
The tendons of the rotator cuff, not the muscles, are most commonly involved, and of the four, the supraspinatus is most frequently affected, as it passes below the acromion.
34.
Sele underwent surgery ( October 18, ) to repair partial tear of the supraspinatus muscle and labrum in his right rotator cuff ( performed by Angels Medical Director Dr . Lewis Yocum ).
35.
Even though the supraspinatus is the most commonly injured muscle of the four muscles in the rotator cuff, the other three muscles that comprise the rotator cuff are the infraspinatus teres minor, and subscapularis.
36.
Codman exercises ( giant, pudding-stirring ), to " permit the patient to abduct the arm by gravity, the supraspinatus remains relaxed, and no fulcrum is required " are widely used.
37.
It arises from the lateral border of the coracoid process, and passes obliquely downwards and laterally to the front of the greater tubercle of the humerus, blending with the tendon of the supraspinatus muscle.
38.
To stop this compressing against the undersurface of the acromion the humeral head and injuring the supraspinatus tendon, there is a simultaneous contraction of some of the muscles of the rotator cuff : the infraspinatus and subscapularis primarily perform this role.
39.
It is strengthened, above, by the Supraspinatus; below, by the long head of the Triceps brachii; behind, by the tendons of the Infraspinatus and Teres minor; and in front, by the tendon of the Subscapularis.
40.
The central part of the supraspinatus fossa and the upper part of the infraspinatous fossa, but especially the former, are usually so thin in humans as to be semitransparent; occasionally the bone is found wanting in this situation, and the adjacent muscles are separated only by fibrous tissue.
