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Published online by Cambridge University Press: 22 November 2024
The obturator nerve originates from the anterior rami of L2–L4 through the lumbar plexus. It travels inferiorly into the pelvis medial to both the femoral nerve and psoas major muscle, exiting the pelvis just inferior to the pubic bone along with the obturator vessels via the obturator canal. The obturator nerve splits into two terminal branches, the anterior and posterior divisions of the obturator nerve, around the adductor brevis muscle as it exits the pelvis into the thigh. The anterior division ultimately provides motor innervation to adductor longus, adductor brevis, and gracilis, as well as sensory innervation to portions of the inner thigh and the hip joint.
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