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Alternative TitleExamining Neural Mechanisms underlying the Threat-buffering Function of Nostalgia


Other Abstract

    Threats are inevitable in our daily life. Threats could lead to negative emotion diverse defensive responses such as aggressiveness and risk behaviors. Therefore, how to help people buffer threats rises as an urgent issue. Nostalgia, as a kind of self-conscious, bittersweet but predominantly positive social emotion, serves a variety of adaptive functions such as buffering threat. Little, however, is known about the neural mechanism underlying the buffering function of nostalgia. To explore this issue, we conducted three studies with death-threat as an illustration. Study 1 includes two  behavioral  experiments  and  found  that  nostalgia  speeds  the  response  to death-related threat information and also reduces the defensive responses to it, which replicates past related findings on one hand and provides a foundation for the following two neural studies. Study 2 uses Event-Related Potential (ERP) technique to investigate how nostalgia affects electrophysiological responses to death threat.Results showed that nostalgia modulates the N1 and further decreases the late positive potential (LPP) components elicited by mortality salience, suggesting that nostalgia modulates early processing of death-related information and late self-regulation.Study 3 adopts functional Magnetic Resonance Imaging (fMRl) technique to examine how nostalgia modulates brain responses to mortality threat. Results showed that nostalgia enhances the activities of amygdala, anterior cingulate cortex (ACC), and dorsal  lateral  prefrontal  cortex  (DLPFC),  suggesting  nostalgia  promotes  the perception  and  monitoring  of  death  related  information  as  well  as  ensuing self-regulation. In summary, these results revealed that nostalgia assuage threats by modulating threat perception and corresponding self-regulation simultaneously. These findings  shed light on  the  neural mechanism underlying  adaptive function  of nostalgia.

Keyword怀旧 死亡威胁 威胁感知 自我调控
Degree Discipline基础心理学
Degree Grantor中国科学院研究生院
Place of Conferral北京
Document Type学位论文
Recommended Citation
GB/T 7714
杨紫嫣. 怀旧应对威胁:行为和认知神经机制[D]. 北京. 中国科学院研究生院,2018.
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