Innervation Motor gluteus maximus Sensory none Origin Originates from the sacral plexus carries fibers from L5, S1, and S2 Course of Nerve Arises from the ventral divisions of L5, S1 and S2 Leaves the pelvis through the greater sciatic foramen Runs underneath the piriformis Divides into muscular branches to supply the gluteus maximus Nerve Injury & Clinical Conditions Injury to this nerve leads to a gluteus maximus lurch when gluteus maximus is weak/injured, trunk extends (lean back) on heel-strike on weakened side compensates for weakness of hip extension