| neuralgic amyotrophy | A neurological disorder, of unknown cause, characterised by the sudden onset of severe pain, usually about the shoulder and often beginning at night, soon followed by weakness and wasting of various forequarter muscles, particularly shoulder girdle muscles; both sporadic and familial in occurrence with the former much more common; often preceded by some antecedent event, such as an upper respiratory infection, hospitalization, vaccination, or non-specific trauma; usually attributed to a brachial plexus lesion, because the nerve fibres involed are most often derived from the upper trunk, but actually multiple proximal mononeuropathies. Synonym: acute brachial radiculitis, brachial plexitis, brachial plexus neuropathy, Parsonage-Turner syndrome, shoulder-girdle syndrome. (05 Mar 2000) |
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| neuralgiform | Resembling or of the character of neuralgia. (05 Mar 2000) |
| neuraminic acid | <chemical> Sometimes known as sialic acid, but strictly one of a family of sialic acids (which includes also N glycolyl neuraminic acid and O substituted derivatives). It is a 9 carbon sugar formed by adding to mannose three carbons from pyruvate. Occurs in the subset of glycolipids known as gangliosides and in glycoproteins. The presence of its carboxyl group on glycolipids and glycoproteins is responsible for much of the negative charge on animal cell surfaces. (04 Jul 1999) |
| neuraminidase | <enzyme> Enzyme catalysing cleavage of neuraminic acid residues from oligosaccharide chains of glycoproteins and glycolipids. Since these residues are usually terminal, neuraminidases are generally exo enzymes, although an endoneuraminidase is known. For use as a laboratory reagent, common sources are from bacteria such as Vibrio or Clostridium. A neuraminidase is one of the transmembrane proteins of the envelope of influenza virus. (04 Jul 1999) |
| neuramoebimeter | An instrument for measuring the rapidity of response of a nerve to any stimulus. Origin: neur-+ G. Amoibe, exchange, return, answer, + metron, measure (05 Mar 2000) |
| neuranagenesis | Regeneration of a nerve. Origin: neur-+ G. Ana, up, again, + genesis, origin (05 Mar 2000) |
| neurapophysial | <anatomy> Of or pertaining to a neurapophysis. Source: Websters Dictionary (01 Mar 1998) |
| neurapophysis | <anatomy> One of the two lateral processes or elements which form the neural arch. The dorsal process of the neural arch; neural spine; spinous process. Source: Websters Dictionary (01 Mar 1998) |
| neurapraxia | The mildest type of focal nerve lesion that produces clinical deficits; localised loss of conduction along a nerve without axon degeneration; caused by a focal lesion, usually demyelinating, and followed by a complete recovery. Term often misspelled (neuropraxia), and often used, incorrectly, as a synonym for nerve lesion. See: axonotmesis. Origin: neur-+ G. A-priv. + praxis, action (05 Mar 2000) |
| neurarchy | The dominant action of the nervous system over the physical processes of the body. Origin: neur-+ G. Arche, dominion (05 Mar 2000) |
| neurasthenia | <neurology> A condition of nervous debility supposed to be dependent upon impairment in the functions of the spinal cord. Origin: NL, fr. Gr. Nerve + weakness. Source: Websters Dictionary (01 Mar 1998) |
| neurasthenia gravis | A condition of extreme and lasting neurasthenia. (05 Mar 2000) |
| neurasthenia praecox | A form of nervous exhaustion appearing in the adolescent period. Synonym: primary neurasthenia. (05 Mar 2000) |
| neurasthenic | Relating to, or suffering from, neurasthenia. (05 Mar 2000) |
| neurasthenic helmet | A feeling of pressure over the entire cranium in certain cases of neurasthenia. (05 Mar 2000) |