Complete innervation of extensor digitorum brevis by accessory peroneal nerve.

The accessory peroneal nerve is a normal anatomical variant, electrophysiologically present in 15-28% of normal individuals. An individual with a rare, complete innervation of extensor digitorum brevis muscle by an accessory peroneal nerve is reported, emphasizing the importance of proximal stimulation during routine electrodiagnostic evaluation despite absent distal responses to avoid misdiagnosing axonal lesions.