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Neural mechanisms of emotional expression and social cognition Hisao Nishijo 1 , Toru Tazumi 1 , Etsuro Hori 1 , Taketoshi Ono 1 1System Emotional Science, Graduate School of Medicine, University of Toyama Keyword: 扁桃体 , 情動 , 社会的認知 , 表情 , 心の理論 , 自閉症 pp.38-52
Published Date 2006/2/10
DOI https://doi.org/10.11477/mf.1431100019
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Humans are the most emotional animals. Comparison of emotional behaviors among different species indicates that number of stimuli that causes emotional reaction increases as animals'intellectual level rises, and that duration of emotional reaction also increases. Consistent with these behavioral studies, sensory information transmitted from the cerebrum to the amygdala, which plays an important role in emotional behaviors based on biological evaluation, becomes complex since the cerebral cortex develops greatly in primates including humans. This is why a great variety of stimuli can induce emotional reaction in primates. Furthermore, communication skills among the conspecifics develop in primates since the primates live in a group, and social cognition to recognize emotional expression and to infer intention and volition of other individuals has evolved. The amygdala is also suggested to be involved in social cognition. In the present review, these functions of the amygdala in primates are discussed in reference to monkey amygdalar neuronal responses to various stimuli and neuropsychological studies of autistic patients with deficits in social cognition and patients with amygdalar lesions.


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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