<prompt> All are true about gluteus maximus exceptSupplied by superior gluteal nerveCauses extension at hipInseion is at gluteal tuberosityIt is lateral rotator of thigh  <response>: GLUTEUS MAXIMUS:- Origin : iliac crest outer slopePosterior gluteal line,posterior pa of gluteal surface of ilium,Aponeurosis of erector spinae,dorsal surface of lower sacrum,side of coccyx, sacrotuberous ligament,fascia covering gluteus medius. Inseion: gluteal tuberosity Iliotibial tract Nerve supply: inferior gluteal nerve L5,S1,S2Action: chief extensor of thigh at hip joint Lateral rotation of thigh Abduction of thigh It suppos both hip and knee when these joints are slightly flexed. 