obturator internus 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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
The tendon of internal obturator muscle joins the tendon of piriformis muscle and together inserts into the greater trochanter of the femur.
In this report the tendon of internal obturator muscle joins the tendon of piriformis muscle and together inserts into the greater trochanter of the femur.
The internal obturator muscle was elevated and sutured medially and laterally by coccygeus and levator ani muscles using mattress pattern 1-0 polypropylene sutures followed by subcutanelous sutures using polygalactin 910.
Comparison of standard perineal herniorrhaphy and transposition of the internal obturator muscle for perineal hernia repair in the dog.
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.
A set of 2 specific needles are used to pass through the skin incision and then rotated to perforate the obturator membrane along with its both external and internal obturator muscles and keeping close contact with the bone, turns around the ischiococcygeus ramus.(Fig.1-7) A finger tip is introduced in the space between the vaginal flap and urethra up to the pelvic fascia and waits for the tip of the needle to come.
Press posteriorly toward the rectum, and tell the patient "this is pressure." Then palpate the pubococcygeal, transverse perineal, and internal obturator muscles. "For each muscle," he said, "ask, 'Is this pressure or pain?' Are there trigger points?

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