All are true about gluteus maximus except

GLUTEUS MAXIMUS:- Origin : iliac crest (outer slope)Posterior 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,S2)Action: 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. <img src=" /> Reference: BDC 6E pg no.68}