The transverse radioulnar branch from the dorsal sensory ulnar nerve: its clinical and anatomical significance further defined.

The anatomy of the dorsal sensory ulnar nerve has been well described, but a transverse branch that innervates the distal radioulnar joint and overlying skin, has not been well delineated. This study, from both an anatomic and clinical perspective, confirms its presence approximately 80% of the time and documents the size, course, and type specificity.