The shoulder is the most mobile joint in the body, allowing a tremendous amount of motion of the arm. The shoulder is normally held in place by a joint capsule and ligaments. Its movement and strength are derived from the many important muscles of the shoulder, including the rotator cuff, biceps, triceps, and scapula muscles.
Shoulder pain & injuries may be the result of a trauma, such as a fall. They may also be due to overuse, such as throwing a ball repetitively or they may be degenerative injuries that occur with aging. Many times the injury to the shoulder is the result of a combination of trauma, overuse, and degeneration of the tissues.