The rotator cuff consists of the muscles and tendons that attach the shoulder to the upper arm. The rotator cuff is so named because these muscles permit the shoulder to rotate. The rotator cuff may also be called a rotor cuff or rotator cup.
The rotator cuff is made up of tendons attached to the humerus, or upper arm, and four muscles of the shoulder which attach to the scapula, or shoulder blade. These tendons and muscles form a ring, or cuff, stabilizing the shoulder while still allowing it to move in a somewhat circular motion. The tendons of the rotator cuff can become weakened with age or wear, or pinched between bones in the shoulder, resulting in pain and injury. Repetitive motions or strain can increase the likelyhood of a rotator cuff injury in the workplace.
Synonyms
Rotator Cup, Rotor Cuff
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