[A nerve originating in the lumbar spinal cord (usually L2 to L4) and traveling through the lumbar plexus to provide motor innervation to extensors of the thigh and sensory innervation to parts of the thigh, lower leg, and foot, and to the hip and knee joints. ( MSH )]
UMLS (NCI) C0015808 - Body Part, Organ, or Organ Component