特別講演 生得的な脅威感知システム : ウロコのテクスチャーがあるからヘビが怖い

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  • 生得的な脅威感知システム : ウロコのテクスチャーがあるからヘビが怖い
  • トクベツ コウエン セイトクテキ ナ キョウイ カンチ システム : ウロコ ノ テクスチャー ガ アル カラ ヘビ ガ コワイ
  • An innate threat detection system in the human brain : Scale is the key to fear for snake

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Abstract

Humans are afraid of specific stimuli, such as angry faces and snakes. It has been a long debate on whether such fear responses are acquired through learning or an innate one. A series of our studies demonstrated that a picture of snake among those of flowers was also quickly detected by human adults. We also found that even young children of three years old detected a picture of snake among flower pictures, which suggests that humans are innately sensitive to snakes. Further, we found that macaque monkeys reared in a laboratory with no experience with snakes also detected snake pictures quickly. These results strongly suggest that snakes and/or angry face are phylogenetic fear-relevant stimuli, and that the exaggerated sensitivity to snakes by humans and monkeys have evolutional routes. A hypothesis and our on-going studies suggest scale is the key to snake fear.

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