Saphenous Nerve

Description

Arising from the femoral nerve in the proximal thigh, the saphenous nerve descends within the adductor canal, lying anterolateral to the femoral artery before crossing toward the medial side as it approaches the canal’s distal opening. Distal to the knee it accompanies the great saphenous vein along the medial leg, then continues toward the medial malleolus and medial border of the foot, where its cutaneous branches distribute over the dorsomedial midfoot and forefoot. Superficial to the tarsals and metatarsals, small nerve twigs run between extensor tendons and the dorsal venous network. Purely sensory. Clinically, this course explains both adductor canal block patterns and common iatrogenic injury sites: the saphenous nerve can be entrapped where it pierces the fascia between sartorius and gracilis near the medial knee, and it is vulnerable during great saphenous vein harvesting, medial tibial plating, and arthroscopic portals. Distal branches account for dorsomedial foot paresthesia after trauma or surgery around the medial malleolus, and they help separate saphenous territory from superficial fibular (peroneal) and deep fibular innervation on sensory mapping. A dependable landmark. Educators can use this plate in lower-limb anatomy teaching to link the adductor canal region to distal cutaneous fields on the foot, or in anesthesia and pain publications discussing selective saphenous nerve blockade and postoperative numbness patterns. It also fits operative planning materials for venous procedures and medial ankle approaches when counseling patients about sensory deficits. Anatomical accuracy verified by SciePro's Medical Advisory Board.