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EFFECT OF ETHYL ALCOHOL ON ELECTRICAL ACTIVITY OF NEO-, PALEO-, AND ARCHICORTICAL SYSTEMS Kazutaka Kogi 1 , Yoshio Nakamura 2 , Tomoyo Miyama 2 , Hiroshi Kawamura 2 1Physiol. Dept., Institute for Science of Labour 2Physioi. Dept., Institute of Brain Research, Tokyo University pp.481-493
Published Date 1960/6/1
DOI https://doi.org/10.11477/mf.1406200936
  • Abstract
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Effect of orally administered ethyl alcohol on the neocortex, amygdala and hippocampus and reticular hypothalamic activating system was studied on curarized adult cats.

(1) Administration of ethyl alcohol produ-ces a distinct dissociation between the ele-ctrical activity level of the neocortex and that of the limbic system, amygdala and hi-ppocampus. The latters sustain arousal state, while the neocortex reveals high-amplitude slow activity of sleep pattern. Such dis-sociation is most distinct when the alcohol concentration in blood is over 300mg%. Spon-taneous spindle bursts in the neocortex are absent or take abortive forms.

(2) Ethyl alcohol markedly depress the re-ticular and thalamic arousal reaction for the neocortex, while it leaves ant. hypothalamus-paleocortical or post. hypothalamus-archicor-tical arousal reactions almost intact. Alcohol is postulated to depress selectively the neo-cortical system, including the ascending reti-cular activating system, leaving the paleo-, and archicortical systems unimpaired.


Copyright © 1960, 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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