Anatomical Structure and Location of the Posterior Femoral Cutaneous Nerve, Posterior View

Description

Arising from the sacral plexus, the posterior femoral cutaneous nerve (S1 to S3) is traced as it exits the pelvis through the greater sciatic foramen inferior to piriformis, then courses deep to gluteus maximus and becomes superficial at the inferior gluteal fold. From there it descends in the posterior compartment of the thigh, running medial to the biceps femoris and posterior to the adductor magnus, with the nerve typically traveling in close company with the small saphenous vein and accompanying superficial vessels in the popliteal region. Cutaneous branches spread over the posterior thigh and popliteal fossa, and inferior clunial branches turn superiorly over the lower buttock. Posterior access makes the fascial relationships readable, which is where this nerve often becomes clinically relevant. Sitting pain and dysesthesia over the posterior thigh, sometimes labeled as “wallet neuritis,” can reflect entrapment or irritation of the posterior femoral cutaneous nerve near the ischial tuberosity and inferior gluteal fold, and symptoms can be confused with S1 radiculopathy or proximal sciatic neuropathy. This view also supports teaching the distinction between the posterior femoral cutaneous nerve and the sciatic nerve, which lies deeper and more lateral as it enters the posterior thigh. Use it for gross anatomy and neuroanatomy modules covering the sacral plexus, posterior thigh compartments, and cutaneous innervation maps, and for surgical education on posterior hip approaches, hamstring origin work, and gluteal region injections where superficial neural structures are at risk. It also fits pain medicine and peripheral nerve texts illustrating sensory nerve blocks and differential diagnosis of posterior thigh pain. Anatomical accuracy verified by SciePro's Medical Advisory Board.