obturator internus muscle

(redirected from internal obturator muscle)
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ob·tu·ra·tor in·ter·nus mus·cle

(ob'tŭr-ā-tŏr in-ter'nŭs mŭs'ĕl)
Origin, pelvic surface of obturator membrane and margin of obturator foramen; insertion, passes out of pelvis through lesser sciatic foramen, in so doing, making a 90° turn to insert into the medial surface of greater trochanter; action, rotates thigh laterally; nerve supply, nerve to obturator internus (sacral plexus).
Synonym(s): musculus obturatorius internus [TA] , internal obturator muscle.
References in periodicals archive ?
The Perigee Prolapse Repair System (American Medical Systems), the Gynecare Prolift Total, Anterior and Posterior Pelvic Floor Repair System (Ethicon), and the Avaulta Plus Biosynthetic Support System - Anterior (Bard Urological) all use a transobturator approach and use the ileococcygeus muscle and the internal obturator muscles as their anchor points, he said.
Then palpate the pubococcygeal, transverse perineal, and internal obturator muscles.

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