Superficial Branch of the Radial Nerve, Anterior View

Description

Running along the lateral (radial) aspect of the anterior forearm, the superficial branch of the radial nerve emerges distal to the elbow and tracks deep to the brachioradialis muscle before becoming subcutaneous near the distal third of the forearm. The nerve courses in close association with the radius, passing anterior to the radiocarpal region and then dividing into terminal dorsal digital branches directed toward the dorsolateral hand. Bony landmarks including the humerus proximally, the radius and ulna in the forearm, and the carpal and metacarpal skeleton help fix the nerve’s path in space, from proximal to distal and from lateral toward the dorsal radial border of the hand. Labels anchor these relationships. An anterior perspective on this nerve matters because the superficial radial nerve is the sensory branch most often irritated where it pierces fascia between the brachioradialis and extensor carpi radialis longus tendons, a pattern clinicians recognize as Wartenberg syndrome (cheiralgia paresthetica). Small errors in portals and incisions around the distal radius, first dorsal compartment, or radial styloid can cause painful neuroma or dysesthesia over the dorsal thumb and index web space. Nerve injury here is common. Seeing its initial deep concealment under brachioradialis clarifies why the nerve may be spared in more proximal trauma yet vulnerable at the wrist. Use this plate in gross anatomy and neuroanatomy teaching when you need a clean map of the superficial radial nerve relative to the radius, carpus, and dorsal digital distribution, without the distraction of deeper plexus detail. It also fits hand surgery texts and procedure guides addressing De Quervain release, distal radius approaches, and safe injection sites along the radial wrist, where superficial sensory nerves are at risk. Anatomical accuracy verified by SciePro's Medical Advisory Board.