The upper-limb consists of the shoulder girdle, arm, forearm and hand. Biomechanics of human shoulder represent an extremely sophisticated and interrelated system that can produce a variety of complex movements and is supported and stabilized by a number of muscles connected to the ribs and vertebrae.
A lot of movements of daily living such as eating or bathing depend of the adequate movement of this joint.
The four most common causes of shoulder pain are rotator cuff disorders, glenohumeral disorders, acromioclavicular joint disease and referred neck pain. The rotator cuff is a group of four muscles and tendons that helps stabilize the shoulder and aid in movement.
