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Obturator Internus

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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

Action - Laterally rotate extended thigh and abduct flexed thigh; steady femoral head in acetabulum

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