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FUNCTIONAL RÔLE OF CORTICAL AREAS IN THE EXCITATORY AND INHIBITORY PROCESSES IN CONDITIONED REFLEX : (I) EFFECT OF AUDITORY CORTEX ABLATION ON AUDITORY CONDITIONED REFLEX Moriya Tanaka 1 1Department of Physiology, Faculty of Medicine, Kyoto University pp.841-862
Published Date 1960/10/1
DOI https://doi.org/10.11477/mf.1406200987
  • Abstract
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1) Bilateral ablation of cortical acoustic areas or sub-areas was performed on the dogs after the establishment of salivary con-ditioned reflexes to various acoustic condi-tioned stimuli.

2) In all cases, the positive conditioned reflexes as excitatory processes were essen-tially unimpaired.

3) On the contrary, the differential inhibi-tion was affected: most markedly after the total removal of the areas, especially at ear-ly postoperative period. In the case of the successive removal of the acoustic sub-areas known as such by means of electrophysiolo-gical or histological investigations, the dif-ferential inhibition was most affected after the bilateral ablation of posterior ectosylvi-an gyrus which is generally regarded as a secondary acoustic area.

4) Usually, no difference was found in the effects of the ablation on various acoustic conditioned reflexes tested.


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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