The rotator cuff is a group of muscles and tendons that surround the shoulder joint, keeping the head of your upper arm bone firmly within the shallow socket of the shoulder. There are 4 muscles which make up the rotator cuff group of the shoulder (supraspinatus, infraspinatus, teres minor, and subscapularis).
Overloading the complex can result in a strain or tear of one of the rotator cuff muscles. Tears may be partial or complete. A rotator cuff injury can cause a dull ache in the shoulder, which often worsens with use of the arm away from the body.
Signs & Symptoms
Weakness Inability to lift the arm out in front or out to the side
Tenderness on palpation of the rotator cuff muscle