| ICA | Institute of Clinical Analysis; internal carotid artery; intracranial aneurysm; islet cell antibody |
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| ICAO | internal carotid artery occlusion |
| ICC | immunocompetent cells; immunocytochemistry; Indian childhood cirrhosis; intensive coronary care; int... |
| IDIC | Internal Dose Information Center |
| IDK | internal derangement of knee |
| internal oblique line | A ridge on the inner surface of the mandible running from a point inferior to the mental spine upward and backward to the ramus behind the last molar tooth; it gives attachment to the mylohyoid muscle and the lowermost part of the superior constrictor of the pharynx. Synonym: linea mylohyoidea, internal oblique line, mylohyoid ridge. (05 Mar 2000) |
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| 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 |
| internal occipital crest | A ridge running from the internal occipital protuberance to the posterior margin of the foramen magnum, giving attachment to the falx cerebelli. Synonym: crista occipitalis interna. (05 Mar 2000) |
| internal occipital protuberance | A projection from about the centre of the cruciform eminence on the inner surface of the occipital bone. Synonym: protuberantia occipitalis interna. (05 Mar 2000) |
| internal ophthalmopathy | Any disease of the internal structures of the eyeball. (05 Mar 2000) |
| internal ophthalmoplegia | Paralysis affecting only the sphincter muscle of the pupil and the ciliary muscle. Synonym: internal ophthalmoplegia. (05 Mar 2000) |
| internal ovular transmigration | Indirect ovular transmigration when the ovum crosses the uterine cavity and so enters the tube of the opposite side. (05 Mar 2000) |
| internal phase | The particles contained in a colloid solution. Synonym: discontinuous phase, dispersed phase. (05 Mar 2000) |
| internal pterygoid muscle | <anatomy, muscle> Origin, pterygoid fossa of sphenoid and tuberosity of maxilla; insertion, medial surface of mandible between angle and mylohyoid groove; action, elevates mandible closing jaw; nerve supply, nerve to medial pterygoid from mandibular division of trigeminal. Synonym: musculus pterygoideus medialis, internal pterygoid muscle, musculus pterygoideus internus. (05 Mar 2000) |
| internal pudendal artery | <anatomy, artery> Origin, internal iliac; branches, inferior rectal, perineal, posterior scrotal (or labial), urethral, artery of bulb of penis (or of vestibule), deep artery of penis (or clitoris), dorsal artery of penis (or clitoris). Synonym: arteria pudenda interna. (05 Mar 2000) |
| internal pudendal vein | <anatomy, vein> A tributary of the internal iliac vein that accompanies the internal pudendal artery as a single or double vessel. It drains the perineum. Synonym: vena pudenda interna. (05 Mar 2000) |
| internal pyocephalus | Intraventricular suppuration. (05 Mar 2000) |
| internal radiation therapy | Radiation therapy in which radioactive material is placed in or near a tumour. (12 Dec 1998) |
| internal ramus of accessory nerve | <anatomy, nerve> Branch of the accessory nerve trunk which carries fibres from the cranial root and which unites with the vagus nerve in the jugular foramen. See: accessory nerve. Synonym: ramus internus nervi accessorii, internal ramus of accessory nerve. (05 Mar 2000) |
| internal reduction | The relocation of a joint or realignment of a fracture through a surgical incision. most internal reductions utilise general anaesthesia. (27 Sep 1997) |