ムラヤマ ノリオ    Murayama Norio
   村山 憲男
   所属
人間社会学部 心理学科
 
生活機構研究科 心理学専攻
 
生活心理研究所 所属教員
   職種
准教授
言語種別 英語
発行・発表の年月 2016/10
形態種別 学術雑誌
査読 査読あり
標題 The functional activity and effective connectivity of pulvinar are modulated by individual differences in threat-related attentional bias
執筆形態 共著
掲載誌名 Scientific Reports
掲載区分国外
巻・号・頁 6,pp.34777
著者・共著者 Yuko HAKAMATA, Eisuke SATO, Shotaro KOMI, Yoshiya MORIGUCHI, Shuhei IZAWA, Norio MURAYAMA, Takashi HANAKAWA, Yusuke INOUE, Hirokuni TAGAYA
概要 The pulvinar is important in selective attention, particularly to visual stimuli under the focus of attention. However, the pulvinar is assumed to process emotional stimuli even outside the focus of attention, because of its tight connection with the amygdala. We therefore investigated how unattended emotional stimuli affect the pulvinar and its effective connectivity (EC) while considering individual differences in selective attention. fMRI in 41 healthy human subjects revealed that the amygdala, but not the pulvinar, more strongly responded to unattended fearful faces than to unattended neutral faces (UF > UN), although we observed greater EC from the pulvinar to the amygdala. Interestingly, individuals with biased attention toward threat (i.e., attentional bias) showed significantly increased activity (UF > UN) and reduced grey matter volume in the pulvinar. These individuals also exhibited stronger EC from the pulvinar to the attention-related frontoparietal network (FPN), whereas individuals with greater attentional control showed more enhanced EC from the pulvinar to the amygdala, but not the FPN (UF > UN). The pulvinar may filter unattended emotional stimuli whose sensitivity depends on individual threat-related attentional bias. The connectivity patterns of the pulvinar may thus be determined based on individual differences in threat-related attentional bias and attentional control.