急性压力选择性地削弱了奖励预期,而不是消耗:一项ERP研究

IF 4.3 2区 医学 Q1 NEUROSCIENCES
Wei Yi , Yantao Chen , Linlin Yan , Nils Kohn , Jianhui Wu
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引用次数: 0

摘要

应激诱导的奖励处理功能障碍是与精神疾病相关的一个关键因素。尽管许多研究试图澄清压力和奖励之间的关系,但很少有研究调查急性压力对奖励加工的时间动态的影响。本研究应用事件相关电位(ERP)研究急性应激对奖赏预期和消费的不同影响。在这项研究中,78名大学生在完成特里尔社会压力任务(TSST)或安慰剂任务后完成了双门奖励任务。与对照组相比,TSST组表现出更高的皮质醇水平、感知压力、焦虑和负面情绪。在对照组中,较高的奖励强度引起的线索- n2减少,但刺激前负性(SPN)增加,表明对照组对奖励强度敏感。相反,这些影响在应激组中不存在,这表明急性应激降低了预期阶段对奖励大小的敏感性。然而,两组的奖励积极性(RewP)和P3表现出相似的模式,这表明急性应激对完满期的奖励反应没有影响。这些发现表明,急性应激在预期阶段而不是完成阶段选择性地减弱了对奖励大小的敏感性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Acute stress selectively blunts reward anticipation but not consumption: An ERP study

Stress-induced dysfunction of reward processing is documented to be a critical factor associated with mental illness. Although many studies have attempted to clarify the relationship between stress and reward, few studies have investigated the effect of acute stress on the temporal dynamics of reward processing. The present study applied event-related potentials (ERP) to examine how acute stress differently influences reward anticipation and consumption. In this study, seventy-eight undergraduates completed a two-door reward task following a Trier Social Stress Task (TSST) or a placebo task. The TSST group showed higher cortisol levels, perceived stress, anxiety, and negative affect than the control group. For the control group, a higher magnitude of reward elicited a reduced cue-N2 but increased stimulus-preceding negativity (SPN), suggesting that controls were sensitive to reward magnitude. In contrast, these effects were absent in the stress group, suggesting that acute stress reduces sensitivity to reward magnitude during the anticipatory phase. However, the reward positivity (RewP) and P3 of both groups showed similar patterns, which suggests that acute stress has no impact on reward responsiveness during the consummatory phase. These findings suggest that acute stress selectively blunts sensitivity to reward magnitude during the anticipatory rather than the consummatory phase.

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来源期刊
Neurobiology of Stress
Neurobiology of Stress Biochemistry, Genetics and Molecular Biology-Biochemistry
CiteScore
9.40
自引率
4.00%
发文量
74
审稿时长
48 days
期刊介绍: Neurobiology of Stress is a multidisciplinary journal for the publication of original research and review articles on basic, translational and clinical research into stress and related disorders. It will focus on the impact of stress on the brain from cellular to behavioral functions and stress-related neuropsychiatric disorders (such as depression, trauma and anxiety). The translation of basic research findings into real-world applications will be a key aim of the journal. Basic, translational and clinical research on the following topics as they relate to stress will be covered: Molecular substrates and cell signaling, Genetics and epigenetics, Stress circuitry, Structural and physiological plasticity, Developmental Aspects, Laboratory models of stress, Neuroinflammation and pathology, Memory and Cognition, Motivational Processes, Fear and Anxiety, Stress-related neuropsychiatric disorders (including depression, PTSD, substance abuse), Neuropsychopharmacology.
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