| 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) |
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| 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) |
| obturator hernia | Hernia through the obturator foramen. (05 Mar 2000) |
| obturator internus | <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 lymph nodes | Nodes of the internal iliac group located along the obturator artery. Synonym: nodi lymphatici obturatorii. (05 Mar 2000) |
| obturator membrane | The thin membrane of strong interlacing fibres filling the obturator foramen. Synonym: membrana obturatoria. (05 Mar 2000) |
| obturator nerve | <anatomy, nerve> A nerve originating in the lumbar spinal cord (l2 to l4) and traveling through the lumbar plexus to the lower extremity. The obturator nerve provides motor innervation to the adductor muscles of the thigh and cutaneous sensory innervation of the inner thigh. (12 Dec 1998) |
| obturator tubercle | One of two processes, anterior and posterior, on the margin of the pubic portion of the obturator foramen, bounding the termination of the obturator groove. Synonym: tuberculum obturatorium. (05 Mar 2000) |