| posterior branch of obturator artery | <anatomy, artery> Branch of obturator artery giving rise to acetabular branch and supplying muscles attached to ischium. Synonym: ramus posterior arteriae obturatoriae. (05 Mar 2000) |
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| posterior branch of obturator nerve | <anatomy, nerve> Branch supplying obturator externus muscle, then passing posterior to adductor brevis, supplying it and the adductor portion of the adductor magnus muscle. Synonym: ramus posterior nervi obturatorii. (05 Mar 2000) |
| cutaneous branch of obturator nerve | <anatomy, nerve> Branch of the anterior branch of obturator nerve supplying skin of medial thigh above knee. Synonym: ramus cutaneus rami anterioris nervi obturatorii. (05 Mar 2000) |
| hernia, obturator | Hernia through the obturator foramen. (12 Dec 1998) |
| pubic branch of obturator artery | <anatomy, artery> Branch arising from the obturator artery just prior to its pasage through the obturator canal; the branch passes superiorly on the posterior aspect of the pubis. Anastomosis: with contralateral partner and pubic branche of inferior epigastric artery. See: accessory obturator artery, pubic branch of inferior epigastric artery. Synonym: ramus pubicus arteriae obturatoriae. (05 Mar 2000) |
| internal obturator muscle | <anatomy, muscle> 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 |
| obturator | 1. That which closes or stops an opening. 2. <surgery> An apparatus designed to close an unnatural opening, as a fissure of the palate. Origin: NL, fr. L. Obturare to stop up: cf.F. Obturateur. <anatomy> Serving as an obturator; closing an opening; pertaining to, or in the region of, the obturator foramen; as, the obturator nerve. <anatomy> Obturator foramen, an opening situated between the public and ischial parts of the innominate bone and closed by the obturator membrane; the thyroid foramen. Source: Websters Dictionary (01 Mar 1998) |
| obturator appliance | An appliance used to obliterate congenital or acquired defects of the jaws and surrounding structures, usually made of acrylic or rubber. (05 Mar 2000) |
| obturator artery | <anatomy, artery> Anastomoses, iliolumbar, inferior epigastric, medial circumflex femoral; origin, anterior division of the internal iliac; distribution, ilium, pubis, obturator and adductor muscles; branches, pubic, acetabular, anterior, and posterior. Synonym: arteria obturatoria. (05 Mar 2000) |
| obturator canal | The opening in the superior part of the obturator membrane through which the obturator nerve and vessels pass from the pelvic cavity into the thigh. Synonym: canalis obturatorius. (05 Mar 2000) |
| obturator crest | A ridge that extends from the pubic tubercle to the acetabular notch, giving attachment to the pubofemoral ligament of the hip joint. Synonym: crista obturatoria. (05 Mar 2000) |
| obturator externus | <anatomy, muscle> Origin, lower half of margin of obturator foramen and adjacent part of external surface of obturator membrane; insertion, trochanteric fossa of greater trochanter; action, rotates thigh laterally; nerve supply, obturator. Synonym: musculus obturator externus, external obturator muscle. (05 Mar 2000) |
| obturator fascia | The portion of the pelvic fascia that covers the obturator internus muscle. Synonym: fascia obturatoria. (05 Mar 2000) |
| obturator foramen | A large, oval or irregularly triangular aperture in the hip bone, the margins of which are formed by the pubis and the ischium; it is closed in the natural state by the obturator membrane, except for a small opening for the passage of the obturator vessels and nerve. Synonym: foramen obturatum. (05 Mar 2000) |
| obturator groove | A deep groove on the inner surface of the superior ramus of the pubis. Synonym: sulcus obturatorius. (05 Mar 2000) |