Main Model
44 Obturator internus muscle
Obturator internus
Proximal Attachment: Pelvic surface of obturator membrane and surrounding bones
Distal Attachment: Medial surface of greater trochanter (trochanteric fossa) of femur
Innervation: Nerve to obturator internus (L5, S1)
Main Action(s): Laterally rotates extended thigh and abducts flexed thigh; steadies femoral head in acetabulum