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Dislocated Shoulder
The shoulder is a highly mobile joint, allowing the arm to move in almost any direction. The joint is formed by the connection of the humerus (the upper arm bone) and the scapula (shoulder blade). The articular end of the humerus is rounded and fits into a shallowly concave surface of the scapula called the glenoid fossa, forming a flexible ball-and-socket joint. Helping to stabilize the joint are ligaments running from bone to bone, tendons that connect bone to muscle, and a ring of cartilage surrounding the glenoid.
Learn More (for a detailed article on the dislocated shoulder)
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