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阿部准教授の論文が『Human Brain Mapping』に掲載されました

1507abe_human.png 阿部修士准教授(上廣こころ学研究部門)と、2014年度までこころの未来研究センターに日本学術振興会特別研究員として在籍していた伊藤文人東北福祉大学特任講師らの執筆した論文が、学術誌『Human Brain Mapping』Vol.36 に掲載されました。


 本研究は機能的磁気共鳴画像法(fMRI)を用いて、人間が意識的に知覚することのできない「閾下刺激」に対する価値判断の神経基盤を調べた研究です。閾下刺激であっても、後に選好される刺激に対しては、特異的な脳活動が生じることが明らかとなりました。



Ito A, Abe N, Kawachi Y, Kawasaki I, Ueno A, Yoshida K, Sakai S, Matsue Y, Fujii T. Distinct neural correlates of the preference-related valuation of supraliminally and subliminally presented faces. Human Brain Mapping 36: 2865-2877 (2015)


○Abstract
Recent neuroimaging studies have investigated the neural substrates involved in the valuation of supraliminally presented targets and the subsequent preference decisions. However, the neural mechanisms of the valuation of subliminally presented targets, which can guide subsequent preference decisions, remain to be explored. In the present study, we determined whether the neural systems associated with the valuation of supraliminally presented faces are involved in the valuation of subliminally presented faces. The subjects were supraliminally and subliminally presented with faces during functional magnetic resonance imaging (fMRI). Following fMRI, the subjects were presented with pairs of faces and were asked to choose which face they preferred. We analyzed brain activation by back-sorting the fMRI data according to the subjects' choices. The present study yielded two main findings. First, the ventral striatum and the ventromedial prefrontal cortex predict preferences only for supraliminally presented faces. Second, the dorsomedial prefrontal cortex may predict preferences for subliminally presented faces. These findings indicate that neural correlates of the preference-related valuation of faces are dissociable, contingent upon whether the subjects consciously perceive the faces.