Uberon definition : The obturator internus muscle originates on the medial surface of the obturator membrane,
the ischium near the membrane, and the rim of the pubis. It exits the pelvic cavity
through the lesser sciatic foramen. The obturator internus is situated partly within
the lesser pelvis, and partly at the back of the hip-joint. It functions to help laterally
rotate extended thigh and abduct flexed thigh, as well as to steady the femoral head
in the acetabulum.;
The obturator internus muscle originates on the medial surface of the obturator membrane,
the ischium near the membrane, and the rim of the pubis. It exits the pelvic cavity
through the lesser sciatic foramen. The obturator internus is situated partly within
the lesser pelvis, and partly at the back of the hip-joint. It functions to help laterally
rotate extended thigh and abduct flexed thigh, as well as to steady the femoral head
in the acetabulum.