The pathophysiology of acute experimental allergic encephalomyelitis induced by whole spinal cord in the Lewis rat

Journal of the Neurological Sciences
M P Pender

Abstract

Histological and electrophysiological studies were performed on Lewis rats with acute experimental allergic encephalomyelitis (EAE) induced by inoculation with guinea-pig spinal cord and Freund's adjuvants, in order to determine the cause of the neurological signs. These studies demonstrated demyelination-induced nerve conduction block in the large and also the smaller diameter fibres at the ventral root exit zone (VREZ) of the lumbar spinal cord. The demyelination at the VREZ affected both centrally and peripherally myelinated internodes, but predominantly the former. Studies on the H reflex recorded from a hindfoot muscle indicated normal peripheral nerve motor conduction but interruption of the monosynaptic reflex arc, as would be anticipated from this efferent conduction block and previously reported afferent conduction abnormalities. It is concluded that conduction block in alpha, beta and gamma motor fibres at the VREZ is an important cause of hindlimb weakness in whole spinal cord-induced acute EAE.

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Citations

May 1, 1993·Annals of Neurology·M P Pender
May 1, 1993·Annals of Neurology·S PrzedborskiU Muthane
Jan 1, 1993·Muscle & Nerve·S G Waxman
Dec 22, 1999·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·K J Smith, W I McDonald
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Dec 23, 2011·Annals of Neurology·Beatriz MorenoTracey A Newman
May 23, 2008·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Sonoko MisawaTakamichi Hattori
Aug 1, 1992·Annals of Neurology·K VassH Lassmann
Sep 19, 2018·Journal of Neurochemistry·Omar de FariaJunhua Xiao
Mar 24, 1999·Neuroscience and Behavioral Physiology·E ZapryanovaN Filchev

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