The shoulder complex has the greatest mobility of all joints. On one hand, this mobility is
because of little bony congruity of its articulating surfaces. The joints of the shoulder complex
have to rely on adjacent ligaments and muscles to provide stability. Consequently, they are
susceptible to injury and degeneration. On the other hand, the shoulder complex is
composed of the scapulothoracic articulation and the glenohumeral joint to share the overall
motion and increase its range. This composition allows the involved muscles to work in the …