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J Neurol Sci. 1986 Feb;72(2-3):231-42.

Involvement of the dorsal root ganglion in acute experimental allergic encephalomyelitis in the Lewis rat. A histological and electrophysiological study.


Histological and electrophysiological studies were performed in Lewis rats with acute experimental allergic encephalomyelitis (EAE) in order to determine the extent of dorsal root ganglion (DRG) involvement. Histological studies showed inflammation and demyelination in both the central nervous system (CNS) and peripheral nervous system (PNS). The DRG was the most affected region of the PNS and its involvement increased caudally. Nerve conduction abnormalities were demonstrated in the regions of the lumbar, sacral or coccygeal DRGs in some of the rats with EAE. However, the overall DRG involvement was much less severe, both histologically and functionally, than what we recently found in rabbits with EAE. Conduction through the lumbar dorsal root entry zone was normal. We conclude that lesions of the afferent pathway to the spinal cord do not contribute significantly to the disturbances of hindlimb motor function in Lewis rats with EAE.

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