Main Entry: obturator nerve Function: noun : a branch of the lumbar plexus that arises from the second, third, and fourth lumbar nerves and that supplies the hip and kneejoints, the adductor muscles of the thigh, and the skin
obturator nerven. A nerve that arises from the second, third, and fourth lumbar nerves in the psoas muscle, enters the thigh through the obturator canal, and supplies the muscles and skin on the medial side of the thigh.
