Memory for friends or foes: The social context of past encounters with faces modulates their subsequent neural traces in the brain

被引:35
作者
Vrticka, Pascal [1 ,2 ]
Andersson, Frederic [2 ]
Sander, David [1 ]
Vuilleumier, Patrik [1 ,2 ]
机构
[1] Univ Geneva, Geneva, Switzerland
[2] Ctr Med Univ Geneva, Geneva, Switzerland
基金
瑞士国家科学基金会;
关键词
Familiar face recognition; Friends or foes; Social judgement; Affective reactions; fMRI; SPONTANEOUS TRAIT INFERENCES; POSTERIOR CINGULATE CORTEX; MEDIAL PREFRONTAL CORTEX; HUMAN AMYGDALA; SYSTEMS; RECOGNITION; FMRI; FAMILIARITY; ACTIVATION; RESPONSES;
D O I
10.1080/17470910902941793
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Every day we encounter new people, interact with them, and form person impressions based on quick and automatic inferences from minimal contextual information. Previous studies have identified an extensive network of brain areas involved in familiar face recognition, but there is little evidence to date concerning the neural bases of negative vs. positive person impressions. In the present study, participants were repeatedly exposed to 16 unfamiliar face identities within a pseudo-interactive game context to generate a perception of either ofriendso or ofoeso. Functional magnetic resonance imaging (fMRI) was then performed during an old/new memory task to assess any difference in brain responses to these now familiar face identities, relative to unfamiliar faces. Importantly, whereas facial expressions were always emotional (either smiling or angry) during the encoding phase, they were always neutral during the memory task. Our results reveal that several brain regions involved in familiar face recognition, including fusiform cortex, posterior cingulate gyrus, and amygdala, plus additional areas involved in motivational control such as caudate and anterior cingulate cortex, were differentially modulated as a function of a previous encounter, and generally more activated when faces were perceived as ofoeso rather than ofriendso. These findings underscore that a key dimension of social judgments, based on past impressions of who may be supportive or hostile, may lead to long-lasting effects on memory for faces and thus influence affective reactions to people during a subsequent encounter even in a different (neutral) context.
引用
收藏
页码:384 / 401
页数:18
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