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The shoulder joints consist of the glenohumeral joint, acromioclavicular joint, sternoclavicular joint and the scapulothoracic joint, which is technically not a true joint. The bony structures consist of the humerus, scapula, and clavicle. Soft tissue includes muscles, for example the rotator cuff muscles (Supraspinatus, Infraspinatus, Subscapularis, and Teres Minor), several ligaments including the coracoclavicular (trapezoid and conoid), coracohumeral, and coracoacromial ligament and others, labrum, bursas and brachial plexus nerve. The shoulder joint is the most active and complex joint of the body. The capsule and ligament act as stabilizers, while the muscles and tendons play a dynamic role. Rhythmic cooperation of the shoulder joints ensures the smooth movement in all directions.
Common problems | Rotator cuff muscle tendonitis | Shoulder dislocation | Humerus fracture
Common problems
Common problems are rotator cuff muscle strain or tear, labrum rupture, impingement syndrome, adhesive capsulitis, subluxation, dislocation and fracture. Abnormal repetitive over-head motions and over-loading lift can affect the surrounding soft tissues. Immobilization after upper extremity surgery may cause tissue atrophy and stiffness, restricting motion, especially external rotation and flexion. Rotator cuff muscle soreness is a common problem among computer users, caused by long-term computer use without adequate support.

Shoulder support offers extra compression for the upper arm. Postural correction belt is helpful for clavicle fractures and round shoulder problems by helping align the bones and joints.