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Neural and molecular basis of emotional learning Hisashi Mori 1 1Department of Molecular Neuroscience, Graduate School of Medicine, University of Toyama Keyword: 恐怖条件付け , fear conditioning , グルタミン酸受容体チャネル , glutamate receptor channel , シナプス可塑性 , synaptic plasticity pp.18-24
Published Date 2006/2/10
DOI https://doi.org/10.11477/mf.1431100017
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Fear conditioning is a valuable procedure for studying the neural and molecular basis of the emotional learning. The focus of this review is the roles of glutamate receptor channel subunits in the neural and molecular events in the hippocampus, the amygdala and the prefrontal cortex of the rodent models observed during the fear conditioning. NMDA-type GluRε1 subunit gene knockout mice show increased thresholds for hippocampal long-term potentiation(LTP)and contextual fear conditioning. Inhibition of the NMDA-type GluRε2 subunit in the prefrontal cortex results in the impairment of LTP and contextual fear memory. Furthermore, the blockade of the synaptic incorporation of the AMPA-type GluR1 subunit in lateral amygdala impairs LTP and fear memory. From these results, glutamate receptor subunits are critically involved in the molecular and neural mechanisms of the emotional learning.


Copyright © 2006, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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