Sural Nerve

Description

Running along the posterolateral leg into the lateral border of the foot, the sural nerve is traced from its proximal contributors to the point where the medial sural cutaneous nerve (from the tibial nerve) joins the lateral sural cutaneous or peroneal communicating branch (from the common fibular nerve). After fusion, the trunk continues distal to the lateral malleolus as the lateral dorsal cutaneous nerve, coursing superficial to the calcaneus and toward the dorsolateral foot and little toe. Adjacent landmarks logically include the fibula laterally, the Achilles tendon posteriorly, and the superficial venous plane where the small saphenous vein often accompanies the nerve. That junction is a practical problem area. Its location varies, and that variability matters when harvesting the sural nerve for grafting, planning posterolateral ankle incisions, or placing portals for hindfoot and peroneal tendon procedures where iatrogenic sural neurapraxia remains a familiar complication. Sensory mapping also benefits from a clear sural trajectory, since symptoms from S1 radiculopathy, tarsal tunnel syndrome, or peroneal tendon irritation can mimic or overlap the sural distribution along the lateral foot. Use this plate in lower-limb anatomy teaching to anchor the concept of mixed peripheral nerve formation, or in operative atlases and review articles covering sural nerve biopsy, nerve graft harvest, and lateral ankle arthroscopy safety zones. It also fits patient-facing explanations of lateral foot numbness after ankle sprain or surgical fixation around the lateral malleolus. Anatomical accuracy verified by SciePro's Medical Advisory Board.