neuropathy

Disorder of the peripheral nervous system. It may be genetic or acquired, progress quickly or slowly, involve motor, sensory, and/or autonomic (see autonomic nervous system) nerves, and affect only certain nerves or all of them. It can cause pain or loss of sensation, weakness, paralysis, loss of reflexes, muscle atrophy, or, in autonomic neuropathies, disturbances of blood pressure, heart rate, or bladder and bowel control; impotence; and inability to focus the eyes. Some types damage the neuron itself, others the myelin sheath that insulates it. Examples include carpal tunnel syndrome, amyotrophic lateral sclerosis, poliomyelitis, and shingles. Causes include diseases (e.g., diabetes mellitus, leprosy, syphilis), injury, toxins, and vitamin deficiency (e.g., beriberi). See also neuralgia; neuritis.

neuropathy [nu̇′räp·ə·thē]

(medicine)

Any disease affecting neurons.

Neuropathy

a functional weakness of the nervous system accompanied by a decrease in the absolute threshold (also called the stimulus, or sensitivity, threshold); the condition is frequently congenital.

Neuropathy arises as a disturbance in the function of the autonomic nervous system owing to deleterious influences on the fetus as a whole (for example, infection in the pregnant mother, trauma, or poisoning) or on the individual embryonic cells (as occurs when the parents suffer from alcoholism). Family circumstances, upbringing, and illnesses suffered by the infant play a role in the pathogenesis of neuropathy. The symptoms usually emerge in childhood or adolescence. When neuropathy occurs in early childhood, disturbances of sleep and appetite are most characteristic; the infant has difficulty in falling asleep, awakes easily, suckles poorly, and frequently spits up. Later, vomiting occurs, and either diarrhea or constipation develop.

From the preschool years on, increased general excitability and the rapid onset of fatigue and exhaustion are observed, in addition to continued disturbances of sleep and appetite. Children who suffer from neuropathy blush easily in response to irritation. Motor hyperactivity, nervous tics, and stammering are frequent. In adolescence, autonomic-vascular instability becomes more acute, as evidenced by frequently occurring nervous palpitation, abrupt shifts in blood pressure, headaches, dizzy spells, and fainting spells. The prognosis is favorable, with the neuropathic symptoms usually disappearing with age.

REFERENCES

Simson, T. Nevropatii, psikhopatii i reaktivnye sostoianiia mladencheskogo vozrasta. Moscow-Leningrad, 1929.
Sukhareva, G. E. Klinicheskie lektsii po psikhiatrii detskogo vozrasta, vol. 2. Moscow, 1959.

Mentioned in	?		Encyclopedia browser	?		Full browser	?
No references found			pressure forming pressure fringe pressure front pressure gage pressure gauge Pressure Gradient pressure group Pressure Groups pressure gun pressure head pressure hydrophone pressure ice pressure ice foot Pressure Indicator pressure interface pressure ionization pressure jump pressure line of position pressure maintenance pressure mark pressure measurement pressure melting pressure melting temperature pressure microphone pressure naphtha pressure neuropathy pressure pad pressure pan pressure pattern pressure pattern displacement pressure pattern flying pressure penitente pressure pickup pressure pillow pressure pipe pressure plate pressure plateau pressure point pressure process pressure radius pressure rating pressure regulating valve pressure regulating valve station pressure regulator pressure release pressure relief pressure relief hatch pressure relief valve pressure resistance pressure ridge pressure ring			pressure management pressure management pressure management pressure mark Pressure Mean Indicator Pressure measurement Pressure measurement Pressure measurement pressure melting pressure melting temperature Pressure Meter pressure microphone pressure mine pressure mine circuit Pressure Modulation System Pressure Modulation Valve Pressure Modulator Infrared Radiometer Pressure Modulator Radiometer Pressure Monitor Receiver Transmitter Pressure Monitoring Valve Pressure Multiplier pressure naphtha pressure natriuresis pressure natriuresis pressure natriuresis pressure natriuresis pressure necrosis pressure necrosis pressure necrosis pressure necrosis pressure neuropathy Pressure Number Pressure of Carotid Body O2 Pressure of speech Pressure of the Cerebrospinal Fluid Pressure Operated Directional Pressure Operated Relief Valve Pressure Operated Relief Valve Pressure Operated Valve Pressure Oxidation Pressure pad Pressure pad Pressure pad Pressure pad Pressure pad Pressure Pain Detection Threshold Pressure Pain Threshold pressure pan pressure pants pressure paralysis pressure pattern pressure pattern displacement pressure pattern flying pressure penitente pressure pickup pressure pillow pressure pipe Pressure Pipe Inspection Company Pressure Plan pressure plate pressure plate

Neuropathy (redirected from pressure neuropathy)

neuropathy

REFERENCES

Neuropathy
(redirected from pressure neuropathy)