Dictionary.net

A nerve originating in the lumbar spinal cord (L2 to L4) and traveling through the lumbar plexus to the lower extremity. The obturator nerve provides motor innervation to the adductor muscles of the thigh and cutaneous sensory innervation of the inner thigh.

Proceeds principally from the 2d and 3d lumbar nerves. It descends into the pelvis; gains the obturator foramen; gives branches to the obturator muscles, and divides, behind the abductor primus and pectinalis, into two branches; one anterior, whose branches are distributed to the first two adductors, gracilis, and integuments; the other, posterior, distributing its ramifications to the obturator externus and third adductor.