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(no͝orī`tĭs, nyo͝o–), inflammation of a peripheral nerve, often accompanied by degenerative changes in nervous tissue. The cause can be mechanical (injury, pressure), vascular (occlusion of a vessel or hemorrhage into nerve tissue), infectious (invasion by microorganisms), toxic (metallic or chemical poisoning, alcoholism), or metabolic (vitamin deficiencies, pernicious anemia). Symptoms of neuritis that arise from involvement of sensory nerves are tingling, burning, pin-and-needle sensations, or even loss of sensation. If motor nerves are involved, symptoms may range from a slight loss of muscle tone to paralysis. Since neuritis is regarded as a condition that results from a number of disorders, rather than a disease in itself, treatment is directed first at the underlying cause. See neuralgianeuralgia
, acute paroxysmal pain along a peripheral sensory nerve. Unlike neuritis, there is no inflammation or degeneration of nerve tissue. Neuralgia occurs commonly in the area of the facial, or trigeminal, nerve and brings attacks of excruciating pain at varying intervals.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



an inflammatory disease of the peripheral nerves. The symptoms of neuritis include pain, paralysis, pareses, and the decrease or loss of nerve sensitivity. Neuritides can result from a wide variety of causes. For example, otitis in the middle ear, and such infectious agents as the virus of herpes zoster can be involved in the pathogenesis of neuritis of the facial nerve. Catarrhal factors and traumas can also play a part in the development of this type of neuritis.

Polyneuritis is a special form of neuritis in which many nerves are involved in the disease process. Some polyneuritides are caused by a neurotropic virus. The roots of the spinal nerve are usually affected (as in polyradiculoneuritis), and often the spinal column and even the brain are affected. The most common causes of polyneuritides are chronic exogenous intoxications, such as those caused by alcohol, botulism toxin, and lead, or endogenous, intoxications, for instance, those resulting from diabetes and uremia.

Patients with neuritis experience pain in the extremities, muscular weakness, disturbances of sensitivity, atrophies and pareses of muscles, changes in skin coloring, sweating, and chilliness. These changes appear predominantly in the regions of the hands and feet. Neuritis is treated by first curing the causative disease and then using antibiotics, analgesics, sedatives, and B vitamins. Physiotherapy is also indicated.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


Degenerative or inflammatory nerve lesions associated with pain, hypersensitivity, anesthesia or paresthesia, paralysis, muscular atrophy, and loss of reflexes in the innervated part of the body.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


inflammation of a nerve or nerves, often accompanied by pain and loss of function in the affected part
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Frangione, "The amino acid sequence of neuritic plaque amyloid from a familial Alzheimer's disease patient," Annals of Neurology, vol.
Diffuse A[beta] immunoreactive plaques were present, including within the cerebellum (Thal phase 5), whereas neuritic plaque pathology was predominantly sparse.
In contrast, the percentage of neuritic AR-ir neurons was different (C, 11.8 [+ or -] 3; OVX, 30.3 [+ or -] 2.2; OVX + EB, 30.2 [+ or -] 3.6%; [F.sub.(215)] = 12.46, P = 0.0006; Figure 4(d)).
Taken orally, the nucleoside analogues acyclovir, famciclovir, and valacyclovir which inhibit replication of VZV, can reduce the severity and duration of the acute neuritic pain, thus reducing the risk of PHN [12].
[sup][13] The aggregated A[sz] is toxic to neurons both in vitro and in vivo [sup][14] and the overexpression of human amyloid precursor protein is observed in transgenic mouse models of AD, [sup][15] which causes neuritic plaques similar to those seen in AD patients with learning and memory deficits.
Borderline tuberculoid leprosy was the most frequent morphologic type, seen in 56.3 per cent followed by borderlineborderline ( 1.5 per cent), borderline lepromatous ( 24.9 per cent), lepromatous leprosy ( 8.1 per cent), pure neuritic ( 8.1 per cent), histoid and indeterminate leprosy ( 0.5 per cent each).
PET scans using radio-labeled flutemetamol were safe to use in vivo and confirmed the presence or absence of neuritic beta-amyloid levels "with high sensitivity and specificity" in a phase III trial involving 68 terminally ill older adults.
Feinstein, "Sense and antisense transfection analysis of tau function: tau influences net microtubule assembly, neurite outgrowth and neuritic stability," Journal of Cell Science, vol.
The pain of Eagle syndrome is typically described as sharp or stabbing neuritic pain with radiation into the tonsillar fossa, temporomandiular joint, and/or base of the tongue.
It is indicated for Positron Emission Tomography (PET) imaging of the brain to estimate beta-amyloid neuritic plaque density in adult patients with cognitive impairment who are being evaluated for Alzheimer's disease (AD) and other causes of cognitive decline.