Elbow

Three bones come together to make up the elbow joint. The humerus in the upper part of the arm attaches to the two bones of the forearm, the ulna and radius. Each of these bones has a very distinct shape. Ligaments connect all three bones together. As muscles contract and relax, two unique motions occur at the elbow: bending happens through a hinge joint that allows the elbow to bend and straighten and rotation occurs though a ball-and-socket joint that allows the hand to be rotated palm up and palm down.

It is important to seek immediate medical care for any injuries involving your elbow. Several common conditions affect the elbow. To learn more, click the appropriate link for each condition located in the menu to the upper left.