| INA | infectious nucleic acid; inferior nasal artery; International Neurological Association |
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| INQ | interior nasal quadrant |
| INV | inferior nasal vein |
| NAR | nasal airway resistance; National Association for Retarded [Children, Citizens]; no action required |
| NAS | nasal; National Academy of Sciences; National Association of Sanitarians; neonatal airleak syndrome;... |
| nasal venules of retina | See: inferior nasal venule of retina, superior nasal venule of retina. (05 Mar 2000) |
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| superior nasal arteriole of retina | The branch of the central artery of the retina that passes to the upper medial, or nasal, part of the retina. Synonym: arteriola nasalis retinae superior. (05 Mar 2000) |
| superior nasal concha | The upper thin, spongy, bony plate with curved margins, part of the ethmoidal labyrinth, projecting from the lateral wall of the nasal cavity and separating the superior meatus from the sphenoethmoidal recess, the above bony plate and its thick mucoperiosteum, which is less vascular than that of the middle and inferior conchae. Synonym: concha nasalis superior, Morgagni's concha, superior turbinated bone, turbinated body. (05 Mar 2000) |
| superior nasal venule of retina | The small vein that drains blood from the upper medial (nasal) part of the retina; it joins the central vein. Synonym: venula nasalis retinae superior. (05 Mar 2000) |
| supreme nasal concha | A small concha frequently present on the posterosuperior part of the lateral nasal wall; it overlies the supreme nasal meatus. Synonym: concha nasalis suprema, fourth turbinated bone, highest concha, highest turbinated bone, Santorini's concha, concha santorini, supraturbinal, supreme concha, supreme turbinated bone, turbinated body. (05 Mar 2000) |
| dorsal nasal artery | Origin, ophthalmic; external artery of the nose; distribution, skin of side of root of nose; anastomoses, angular artery. Synonym: arteria dorsalis nasi, arteria nasi externa, dorsal artery of nose, external artery of nose. (05 Mar 2000) |
| inferior nasal arteriole of retina | The branch of the central artery of the retina that supplies the lower medial, or nasal, part of the retina. Synonym: arteriola nasalis retinae inferior. (05 Mar 2000) |
| inferior nasal colliculus | The ovoid, paired, inferior eminence of the laminae of mesencephalic tectum; it receives the lateral lemniscus and projects by way of the brachium of inferior colliculus to the medial geniculate body of the thalamus, and is thus an essential way-station in the central auditory pathway. Synonym: colliculus inferior, corpus quadrigeminum posterius, inferior nasal colliculus, posterior quadrigeminal body. (05 Mar 2000) |
| inferior nasal concha | A thin, spongy, bony plate with curved margins, on the lateral wall of the nasal cavity, separating the middle from the inferior meatus; it articulates with the ethmoid, lacrimal, maxilla, and palate bones, the above bony plate and its thick mucoperiosteum containing an extensive cavernous vascular bed for heat exchange. Synonym: concha nasalis inferior, inferior turbinated bone, turbinated body. (05 Mar 2000) |
| inferior nasal venule of retina | The small vein that passes from the inferior medial (nasal) part of the retina to join the central vein. Synonym: venula nasalis retinae inferior. (05 Mar 2000) |
| internal nasal branches | Branches to nasal cavity. Internal nasal branches of 1) infraorbital nerve (rami nasales interni nervi infraorbitalis ); 2) nasociliary nerve (rami nasales interni nervi ethmoidalis anterioris ). Synonym: rami nasales interni. (05 Mar 2000) |
| olfactory sulcus of nasal cavity | The narrow groove in the nasal cavity above the agger nasi that leads from the atrium to the olfactory area. Synonym: sulcus olfactorius cavum nasi. (05 Mar 2000) |
| transverse nasal groove | A single deep horizontal groove at the level of the alae, with no associated defects. Synonym: transverse nasal groove. (05 Mar 2000) |
| external nasal branches | Branches to external aspect of nose. The external nasal branches of 1) infraorbital nerve, rami nasales externii nervi infraorbitalis, 2) nasociliary nerve, rami nasales externi nervi ethmoidalis anterioris. Synonym: rami nasales externi. (05 Mar 2000) |
| external nasal veins | Several vessels that drain the external nose, emptying into the angular or facial vein. Synonym: venae nasales externae. (05 Mar 2000) |