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The infraspinatus is the main external rotator of the shoulder. When the arm is fixed, it adducts the inferior angle of the scapula. Its synergists are teres minor and the deltoid. [4] The infraspinatus and teres minor rotate the head of the humerus outward (external, or lateral, rotation); they also assist in carrying the arm backward. [1]
Shoulder impingement syndrome is a syndrome involving tendonitis (inflammation of tendons) of the rotator cuff muscles as they pass through the subacromial space, the passage beneath the acromion. It is particularly associated with tendonitis of the supraspinatus muscle. [1] This can result in pain, weakness, and loss of movement at the ...
Infraspinatus, 14. Teres minor), 15. Biceps muscle. The rotator cuff (SITS muscles) is a group of muscles and their tendons that act to stabilize the human shoulder and allow for its extensive range of motion. Of the seven scapulohumeral muscles, four make up the rotator cuff. The four muscles are: supraspinatus muscle; infraspinatus muscle ...
The impinged structures include the supraspinatus muscle, teres minor muscle, and the infraspinatus muscle. The Hawkins–Kennedy test is considered to be a highly sensitive test (79%) [ 3 ] and thus a positive Hawkins–Kennedy test suggests that injury is likely.
Biceps tenotomy and tenodesis are often performed concomitantly with rotator cuff repair or as separate procedures, and can also cause shoulder pain. Tenodesis, which may be performed as an arthroscopic or open procedure, generally restores pain free motion it the biceps tendon, or attached portion of the labrum, but can cause pain.
These deposits are common in rotator cuff tendinopathy and are most frequently found in the supraspinatus tendon (63% of the time), and less frequently in the infraspinatus tendon (7%), subacromial bursa (7%), subscapularis tendon (3%), or in both the supraspinatus and subscapularis tendons at the same time (20%). [1]
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By stabilizing these muscles there is more alignment which causes a reduction in strain and protects the joints. Glenohumeral exercises are focused around strengthening the rotator cuff muscles. The rotator cuff is consisted of subscapularis, infraspinatus, teres minor, and supraspinatus. Benefits of Exercise