The common shoulder injuries often include the following parts: acromioclavicular joint, sternoclavicular joint, and rotator cuff.
Acromioclavicular joint contains the following structures: acromion, coracoid process, lateral clavicle, and ligaments. These structures are all prone to injuries. Acromioclavicular ligament injuries are common, since over-stretching can easily cause ligamentous damages.
Sternoclavicular joint connects clavicle and sternum. The common injury is joint dislocation, as trauma can easily make sternoclavicular joint to dislocate. Rotator cuff injuries commonly occur at the supraspinatus muscle, because of overuse or repetitive traumatic injuries.