Your rotator cuff is located in both of your shoulders. The rotator cuff is a group of muscles and tendons that attach the humerus (upper arm) to the scapula (shoulder blade). The rotator cuff supples stability to the shoulder and enables the shoulder to rotate up and down. The rotator cuff is not just one muscle but it consists of four scapular muscles. These muscles/tendons are nicknamed SITS. The first “S” stands for Supraspinatus which helps the deltoid in abduction of arm. The “I” stands for Infraspinatus which modulates action of the deltoid and stops the humeral head from going upward. It also rotates the upper arm laterally. The “T” stands for Teres Minor the upper arm by performing transverse abduction extension and transverse extension. The last “S” stands for Subscapularis and prevent the humeral head from sliding upward as the arm is abducted. It also rotates the humerus medially. (Saladin,K.Sullivan,S.& Gan,C. 2015.p.295-296)
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