Obturator Nerve, Posterior View

Description

Posteriorly, the obturator nerve is traced from the lumbar plexus within the psoas major, then along the lateral wall of the small pelvis toward the obturator canal at the superior margin of the obturator foramen. The nerve courses inferior and anterior to the pelvic brim, approaching the obturator internus and its fascia, with the hip bones (ilium, ischium, pubis) providing clear bony reference points. More laterally and inferiorly, the proximal femur and patella anchor the lower limb orientation, while the sciatic nerve descends in the gluteal region and posterior thigh as a contrasting major trunk. Blue venous channels accompany the limb pathways and help establish the neurovascular geography. A posterior perspective is practical because it clarifies relationships that matter during pelvic and hip surgery, where the obturator nerve can be injured near the obturator canal or compressed by pelvic hematoma. It also aligns with common pain patterns, obturator neuropathy often presents with medial thigh pain and weakness of hip adduction, findings that can be mistaken for lumbar radiculopathy unless the clinician recalls the nerve’s pelvic course and exit point. One clean landmark. The proximity to the obturator vessels at the canal also frames why bleeding, lymph node dissection, or pelvic fracture fragments can threaten both nerve function and regional perfusion. Use this artwork to teach lumbar plexus outflow in gross anatomy, neuroanatomy, or pelvic surgery modules, and to illustrate obturator nerve block planning for hip procedures or spastic adductor management. It also fits textbooks and journal figures discussing pelvic fracture patterns, acetabular approaches, or differential diagnosis of medial thigh sensory loss in adult male patients. Anatomical accuracy verified by SciePro's Medical Advisory Board.