A common site of radial nerve entrapment:

The radial nerve can often become entrapped in several locations, but one of the most common sites is at the supinator muscle, which is located near the elbow. This condition is often referred to as "Radial Tunnel Syndrome." The radial nerve can also become entrapped at the radial groove of the humerus, which is a common site of injury in fractures of the humerus. Other potential sites of entrapment include the brachioradialis muscle and the wrist, particularly in conditions such as De Quervain's Tenosynovitis.