| MCA | major coronary artery; Maternity Center Association; medical care administration; methylcholanthrene... |
|---|---|
| PA | panic attack; pantothenic acid; paralysis agitans; paranoia; passive aggressive; pathology; patient'... |
| PAD | pain and distress; patient surface axis depth; percutaneous abscess drainage; percutaneous automated... |
| PAH | para-aminohippurate; phenylalanine hydrolase; polycyclic aromatic hydrocarbon; predicted adult heigh... |
| PICA | percutaneous transluminal coronary angioplasty; Porch Index of Communicative Abilities; posterior in... |
| internal nostril | The definitive choana opening into the nasopharynx, after the nasal chambers have been lengthened by the formation of the secondary palate. Synonym: internal nostril. (05 Mar 2000) |
|---|---|
| internal nuclear layer of retina | The intermediate layer of neurons in the retina composed largely of bipolar cells. Synonym: internal nuclear layer of retina, stratum ganglionare retinae, stratum nucleare internum retinae. (05 Mar 2000) |
| internal oblique | <anatomy, muscle> Origin, iliac fascia deep to lateral part of inguinal ligament, anterior half of crest of ilium, and lumbar fascia; insertion, tenth to twelfth ribs and sheath of rectus; some of the fibres from inguinal ligament terminate in the conjoint tendon; action, diminishes capacity of abdomen, flexes lumbar vertebral column (bends thorax forward); nerve supply, lower thoracic. Synonym: musculus obliquus internus abdominis, abdominal internal oblique muscle. (05 Mar 2000) |
| 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) |
| 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 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) |