阿部准教授、柳澤助教の共著論文が 『Social Neuroscience』に掲載されました
上田竜平・オフィスアシスタント（文学研究科大学院生・日本学術振興会特別研究員）、柳澤邦昭助教、阿部修士准教授らの執筆した論文が、学術誌『Social Neuroscience』Vol.12 に掲載されました。
特定の個人とすでに交際関係にある異性に恋をしてしまう「略奪愛」は、人間の社会では制限されているにもかかわらず、日常茶飯事に見られます。本研究では機能的磁気共鳴画像法 (fMRI)を用いた実験を通し、異性の顔写真を処理する際の眼窩前頭皮質と呼ばれる報酬の処理に関わる領域の活動が高い個人ほど、「略奪愛」の関心が高いことが示されました。
なお、本研究はこころの未来研究センター連携MRI研究施設のMRI装置を用いて行われました。
Ueda R, Ashida H, Yanagisawa K, Abe N (2017). The neural basis of individual differences in mate poaching. Social Neuroscience, 12 (4): 391-399http://www.tandfonline.com/doi/full/10.1080/17470919.2016.1182065 ※認証有り
●ABSTRACT
This study tested the hypothesis that individual differences in the activity of the orbitofrontal cortex, a region implicated in value-based decision-making, are associated with the preference for a person with a partner, which could lead to mate poaching. During functional magnetic resonance imaging (fMRI), male participants were presented with facial photographs of (a) attractive females with a partner, (b) attractive females without a partner, (c) unattractive females with a partner, and (d) unattractive females without a partner. The participants were asked to rate the degree to which they desired a romantic relationship with each female using an 8-point scale. The participants rated attractive females higher than unattractive females, and this effect was associated with ventral striatum activation. The participants also indicated lower ratings for females with a partner than for females without a partner, and this effect was associated with parietal cortex activation. As predicted, the participants characterized by higher orbitofrontal activity demonstrated a greater willingness to engage in a romantic relationship with females who have a partner compared with females who do not have a partner. These results are the first to provide a possible neural explanation for why certain individuals are willing to engage in mate poaching.
KEYWORDS: fMRI, individual differences, love, orbitofrontal cortex, reward
2017/06/14