What are the four muscles of the rotator cuff and their functions?

Share on Pinterest Four muscles make up the rotator cuff: the subscapularis, teres minor, supraspinatus, and infraspinatus. Together they assist in stabilizing the shoulder joint as well as in performing various arm movements. Four muscles and their attached tendons make up the rotator cuff.Click to see full answer. Likewise, what are the 4 muscles of the rotator cuff?Of the seven scapulohumeral muscles, four make up the rotator cuff. The four muscles are the supraspinatus muscle, the infraspinatus muscle, teres minor muscle, and the subscapularis muscle.Secondly, how does the rotator cuff work? To start with, the rotator cuff is not a thing; it is basically a collection of four muscles that work together to keep the shoulder joint centered in the socket. Muscles attach to bones via a tendon; the rotator cuff tendons all attach at the front shoulder on the upper arm bone called the humerus. Consequently, what are the functions of the rotator cuff muscles? Functions. The main function of the rotator cuff is to stabilize and center the humeral head in the joint socket, the glenoid cavity. In addition, the muscles tighten the joint capsule preventing a pinch during shoulder movements.Which muscle of the rotator cuff is most commonly injured?Tears in the tendons of these muscles are called rotator cuff tears. The most commonly affected muscle is the supraspinatus. A combination of susceptible anatomy and a lifetime of wear and tear can cause mechanical abrasion and impingement of the supraspinatus on the acromion bone.

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