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introductionstatpearls· Introduction· item NBK546638
The sural nerve is a cutaneous nerve, providing only sensation to the posterolateral aspect of the distal third of the leg and the lateral aspect of the foot, heel, and ankle. It is formed by terminal branches of the tibial and common peroneal nerves that join together in the superficial aspect of the distal third of the leg. It is purely sensory and easily located anatomically, making it a commonly used site for peripheral nerve biopsies and harvesting for nerve grafting.