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INFLUENCE OF DESTRUCTION OF BILATERAL HIPPOCAMPUS UPON AMYGDALOID KINDLING IN RATS Shinji Kondo 1 , Shigeya Tanaka 2 , Tatsuya Tanaka 2 , Yukichi Yonemasu 2 , Tomokatsu Hori 1 1Department of Neurosurgery, Neurological Institute, Tottori Unwersity 2Department of Neurosargery, Asahikawa Medical College pp.1185-1190
Published Date 1989/12/1
DOI https://doi.org/10.11477/mf.1406206437
  • Abstract
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It is well known that hippocampus has an im-portant role in the development of limbic seizures in the experimental model of epilepsy. Intrahip-pocampal microinjections of the ibotenic acid (IBO) resulted in various degree of hippocampal degenerations and influences of these lesion uponamygdaloid kindling rats. A stereotaxic operation was carried out and bipolar electrodes were pla-ced unilaterally in amygdala and hippocampus. The IBO solutions were injected bilaterally into dorsal hippocampus (DH) in Group A, into ventral hip-pocampus (VH) in Group B and into DH and VH in Group C. Phosphate buffer solutions were injec-ted in Group D as a control. All rats were sub-jected to amygdaloid kindling more than 8 days after the operation. Group A, Group B, Group C, and Group D (controls) required 10. 3±2. 6, 11.3±2. 6, 17. 4±4. 4 and 8. 7±2. 3 stimulations for the Stage V seizures, respectively. The kindling rate in Group C increased compared with controls and this increase was statistically significant (P<0. 01). A histopathological study revealed remarkable de-generative changes in DH of Group A, in VH of Group B and all over the hippocampus in Group C. The result suggested facilitatory interaction of the hippocampus upon amygdaloid kindling.


Copyright © 1989, 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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