Right forearm, anterior view, radius shown on the left.One of the two forearm bones. It runs from the lateral epicondyle of the humerus to the thumb side of wrist.

Insertions of the biceps brachii, pronator teres, pronator quadratus, and supinator muscles are on the radius.

In this diagram, the radius is on the left. The diagram shows the anterior view of the right elbow.

See also: ulna.