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Forearm Fracture

A break in one or both of the bones in the lower part of the arm is called a forearm fracture.The two bones in the forearm are the radius and the ulna. The radius is the bone nearest your thumb and the ulna nearest the little finger. A strong membrane between the two bones holds them close together but allows them to rotate around each other to a certain degree. At the proximal (upper) end of the bones, the ulna articulates with the radius and the humerus (upper arm bone) to form the elbow joint, and at the furthest (distal) end, the radius articulates with the ulna and three of the wrist bones. Together they allow a great deal of mobility in the arm, wrist, and hand.

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