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ABSENCE OF ANAL REFLEX IN PATIENTS WITH CENTRAL NERVOUS SYSTEM DISEASE Takamichi Hattori 1 , Keizo Hirayama 1 , Kohei Kita 1 , Kosaku Yasuda 2 , Yutaka Yamashiro 2 1Department of Neurology, School of Medicine, Chiba University 2Department of Urology, School of Medicine, Chiba University pp.925-928
Published Date 1984/9/1
DOI https://doi.org/10.11477/mf.1406205384

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  • Abstract
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The anal reflex was examined electromyographi-cally in 336 patients with central nervous system disease. The absence of anal reflex was found in a total of 78 patients. The incidence of the absence of anal reflex was 31 over 132 (23.7%) in the patients with pyramidal signs in lower extremities, 7 over 41 (17.0%) in patients with extrapyramidalsigns in lower extremities, 12 over 50 (24.0%) in patients with both signs and 28 over 113 (24.8%) in patients without both signs. Further incidence of the absence of anal reflex was 6 over 26 (23.1 %) in patients with unilateral pyramidal signs, 24 over 106 (22.6%) in patients with bilateral pyramidal signs, 3 over 13 (23.1%) in patients with unilateral extrapyramidal signs and 4 over 28 (14.3%) in patients with bilateral extrapyra-midal signs. There was no statistical difference among the above groups, therefore the absence of anal reflex appeared to have no specific relation-ship to pyramidal or extrapyramidal signs.

On the other hand, the incidence of the absence of anal reflex was 33 over 81 (40.7%) in patients with and 45 over 255 (17.6%) in patients without disturbance of light touch and/or pinprick in sacral area. The incidence of the former is statis-tically higher than that of the latter. Therefore we may conclude that the central afferent arch of the anal reflex has a strong relationship to superficial sensory tract, but the central efferent arch has almost no ccnnection with pyramidal or extrapyramidal tracts.


Copyright © 1984, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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