The shoulder joint is a ball and socket joint that connects the upper arm to the body. The bone of the upper arm is called the humerus. The head of the humerus is a round shaped ball that fits into a socket in the scapula or shoulder blade. The bones are protected by cartilage and joint fluid that provide a smooth surface for the bones to move.
Conditions that can affect the Bones
The shoulder joint is held in place by ligaments (bands of tissue) and muscle. The muscles most commonly associated with shoulder problems are a group called the rotator cuff. This important group of muscles is necessary for normal shoulder joint function and serve to lift and rotate the arm.
Conditions that affect muscles or ligaments:
Initial treatment may include rest, physical therapy, injections, shoulder immobilization or medications. Depending on the severity of the shoulder condition, shoulder surgery may be needed.
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