The rotator cuff consists of four muscles that provide shoulder joint stability and is important for shoulder movement. The four muscles are the supraspinatus, infraspinatus, subscapularis and teres minor. All four of the muscles start on the shoulder blade (scapula) and connect to the head of the upper arm bone (humerus). The shoulder joint is a ball and socket joint which resembles a picture of a golf ball (head of upper arm bone) sitting on a golf tee (shoulder joint). The rotator cuff muscles surround the joint forming a cuff. It is important during shoulder motion to maintain the proper position of the ball in the socket. The rotator cuff muscles assist in lifting the arm out to the side and rotating the shoulder for activities such as opening doors or tucking in the back of your shirt.
There are differing degrees of injury to the rotator cuff. An injury to this area can vary from a strain of one muscle, to a partial tear(s), to a complete tear of one or more muscles. Injury to the rotator cuff can be caused by age-related degenerative changes, muscle imbalances in the shoulder, repetitive overhead motions or trauma. Symptoms of rotator cuff involvement include shoulder joint pain, upper arm pain and functional limitations, such as difficulty lifting arm up overhead or reaching behind your back.
Physical therapy can be extremely beneficial to rehab rotator cuff injuries. During the evaluation, the physical therapist will assess shoulder range of motion and strength and perform special tests to determine the cause of pain. From there, an individualized treatment program will be designed. If rehab is unsuccessful or the muscle is completely torn, surgery may be necessary.