The hinge joint formed where the lower end of the humerus meets the upper ends of the radius and ulna. The elbow is stabilized by ligaments at the front, back, and sides. It enables the arm to be bent and straightened, and the forearm to be rotated through almost 180 degrees around its long axis without more than very slight movement of the upper arm. Disorders of the elbow include arthritis and injuries to the joint and its surrounding muscles, tendons, and ligaments. Repetitive strain on the tendons of the muscles of the forearm, where they attach to the elbow, can result in an inflammation that is known as epicondylitis. There are 2 principle types of epicondylitis: tennis elbow and golfer’s elbow. Alternatively, a sprain of the ligaments may occur. Olecranon bursitis develops over the tip of the elbow in response to local irritation. Strain on the joint can produce an effusion or traumatic synovitis. A fall on to the hand or on to the elbow can cause a fracture or dislocation.
Elbow |
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