A rotator cuff injury is an injury to the shoulder muscles that affect the rotation of one’s shoulder either an inner rotation or outer rotation.   The rotator cuff consists of four specific muscles that surround the shoulder consisting of supraspinatus, infraspinatus, teres minor and subscapularis muscles.   Of those four the most commonly injured of them is the supraspinatus muscle.  The rotator cuff muscles also help to stabilize the shoulder joint as well.   Rotator cuff injuries are quite common as the muscles are often used to do many repetitive tasks such  as cleaning, playing sports and jobs such…