タカハシ　ヒデユキ   Hideyuki Takahashi   高橋　英之    所属   追手門学院大学  理工学部 情報工学科    職種   准教授
言語種別	英語
発行・発表の年月	2014/09
形態種別	論文
査読	査読あり
標題	Different impressions of other agents obtained through social interaction uniquely modulate dorsal and ventral pathway activities in the social human brain
執筆形態	共著・編著（代表編著を除く）
掲載誌名	CORTEX
出版社・発行元	ELSEVIER MASSON
巻・号・頁	58,pp.289-300
著者・共著者	Hideyuki Takahashi,Kazunori Terada,Tomoyo Morita,Shinsuke Suzuki,Tomoki Haji,Hideki Kozima,Masahiro Yoshikawa,Yoshio Matsumoto,Takashi Omori,Minoru Asada,Eiichi Naito
概要	Internal (neuronal) representations in the brain are modified by our experiences, and this phenomenon is not unique to sensory and motor systems. Here, we show that different impressions obtained through social interaction with a variety of agents uniquely modulate activity of dorsal and ventral pathways of the brain network that mediates human social behavior. We scanned brain activity with functional magnetic resonance imaging (fMRI) in 16 healthy volunteers when they performed a simple matching-pennies game with a human, human-like android, mechanical robot, interactive robot, and a computer. Before playing this game in the scanner, participants experienced social interactions with each opponent separately and scored their initial impressions using two questionnaires. We found that the participants perceived opponents in two mental dimensions: one represented "mind-holderness" in which participants attributed anthropomorphic impressions to some of the opponents that had mental functions, while the other dimension represented "mind-readerness" in which participants characterized opponents as intelligent. Interestingly, this "mind-readerness" dimension correlated to participants frequently changing their game tactic to prevent opponents from envisioning their strategy, and this was corroborated by increased entropy during the game. We also found that the two factors separately modulated activity in distinct social brain regions. Specifically, mind-holderness modulated activity in the dorsal aspect of the temporoparietal junction (TPJ) and medial prefrontal and posterior paracingulate cortices, while mind-readerness modulated activity in the ventral aspect of TPJ and the temporal pole. These results clearly demonstrate that activity in social brain networks is modulated through pre-scanning experiences of social interaction with a variety of agents. Furthermore, our findings elucidated the existence of two distinct functional networks in the social human brain. Social interaction with anthropomorphic or intelligent-looking agents may distinctly shape the internal representation of our social brain, which may in turn determine how we behave for various agents that we encounter in our society. (C) 2014 The Authors. Published by Elsevier Ltd.
DOI	10.1016/j.cortex.2014.03.011
ISSN	0010-9452/1973-8102
PMID	24880954