| ala cinerea | A prominence in the floor of the inferior fovea of the fourth ventricle that overlies the dorsal motor nucleus of the vagus. Synonym: trigonum nervi vagi, ala cinerea, ashen wing, gray wing, trigone of vagus nerve, va'gi eminentia. (05 Mar 2000) |
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| cinerea | 1. The gray matter of the brain and other parts of the nervous system. 2. Obsolete term for mantle layer. Origin: L. Fem. Of cinereus, ashy, fr. Cinis, ashes (05 Mar 2000) |
| commissura cinerea | The variable connection between the two thalamic masses across the third ventricle; absent in about 20% of human brains. Synonym: adhesio interthalamica, commissura cinerea, commissura grisea, intermediate mass, massa intermedia. (05 Mar 2000) |
| substantia cinerea | The cortex of the brain which contains nerve cell bodies. The gray matter is in contrast to the white matter, the part of the brain that contains myelinated nerve fibres. The gray matter is so named because it in fact appears gray. The white matter is white because that is the colour of myelin, the insulation covering the nerve fibres. In the mysterious affair at styles (1920), agatha christie first quoted the fictional belgian detective hercule poirot in regard to his gray matter: 'this affair must be unravelled from within.' he tapped his forehead. 'these little grey cells. It is up to them as you say over here.' (12 Dec 1998) |
| fascia cinerea | A small paired band that passes around the splenium of the corpus callosum from the lateral longitudinal stria to the dentate gyrus. Synonym: gyrus fasciolaris, fascia cinerea, fasciola cinerea. (05 Mar 2000) |
| fasciola cinerea | A small paired band that passes around the splenium of the corpus callosum from the lateral longitudinal stria to the dentate gyrus. Synonym: gyrus fasciolaris, fascia cinerea, fasciola cinerea. (05 Mar 2000) |
| lamina cinerea | A thin plate passing upward from the optic chiasm and forming the rostral boundary of the third ventricle; membrane closing the rostral neuropore. Synonym: lamina terminalis cerebri, lamina cinerea, terminal plate, velum terminale. (05 Mar 2000) |
| Neisseria | <bacteria> Gram-negative nonmotile pyogenic cocci. Two species are serious pathogens, Neisseria meningitidis (see meningitis) and Neisseria gonorrhoeae. The latter associates specifically with urinogenital epithelium through surface pili. Both species seem to evade the normal consequences of attack by phagocytes. (15 Jan 1998) |
| Neisseria catarrhalis | Former name for Moraxella catarrhalis. (05 Mar 2000) |
| Neisseria caviae | A species found in the pharyngeal region of guinea pigs; may also be found in other animals. (05 Mar 2000) |
| Neisseria flava | A species found in the mucous membranes of the human respiratory tract; easily confused with Neisseria meningitidis. Synonym: Neisseria subflava. (05 Mar 2000) |
| Neisseria flavescens | A species found in cerebrospinal fluid in cases of meningitis; probably occurs in the mucous membranes of the human respiratory tract. (05 Mar 2000) |
| neisseria gonorrhoeae | A species of gram-negative, aerobic bacteria primarily found in purulent venereal discharges. It is the causative agent of gonorrhoea. (12 Dec 1998) |
| Neisseria haemolysans | Former name for Gemella haemolysans. See: Gemella. (05 Mar 2000) |
| neisseria meningitidis | A species of gram-negative, aerobic bacteria found in cerebrospinal fluid as the causative agent of cerebrospinal meningitis (meningitis, meningococcal) as well as in venereal discharges and blood. (12 Dec 1998) |