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特质预期快感缺失的异常奖励动态。

Aberrant reward dynamics in trait anticipatory anhedonia.

机构信息

Department of Psychology, Dalian Medical University, Dalian, China.

出版信息

Soc Cogn Affect Neurosci. 2019 Aug 31;14(8):899-909. doi: 10.1093/scan/nsz062.

Abstract

As a cardinal feature of several psychiatric disorders, anhedonia includes a consummatory component (deficits in hedonic response to rewards) and an anticipatory component (a reduced motivation to pursue them). Although being conceptualized as impairments of reward system, the neural characterization of reward processing in anhedonia is hampered by the enormous heterogeneity in the reward phase ('wanting' vs 'liking') and comorbidity (inherent to disease states). The current event-related potential (ERP) study examined the reward dynamics of anticipatory anhedonia in a non-clinical sample. Anticipatory and consummatory ERP components were assessed with a monetary incentive delay task in a high anticipatory anhedonia (HAA) group and a low anticipatory anhedonia (LAA) group. HAA vs LAA group showed a diminished reward-related speeding during behavioral performance and reported overall reduced positive affect during anticipation and receipt of outcomes. Importantly, neural dynamics underlying reward processing were negatively associated with anticipatory anhedonia across the anticipatory phase indexed by the contingent negative variation and the consummatory phase indexed by the feedback P3. Our results suggest that anticipatory anhedonia in non-clinical individuals is linked to a poor modulation during both anticipatory and consummatory phases of reward processing.

摘要

快感缺失是几种精神障碍的一个主要特征,包括享受成分(对奖励的愉快反应不足)和预期成分(追求奖励的动机降低)。尽管快感缺失被概念化为奖励系统的损伤,但由于奖励阶段(“想要”与“喜欢”)和共病(固有疾病状态)的巨大异质性,快感缺失的奖励处理的神经特征受到阻碍。目前的事件相关电位(ERP)研究在非临床样本中检查了预期快感缺失的奖励动态。在高预期快感缺失(HAA)组和低预期快感缺失(LAA)组中,使用货币奖励延迟任务评估预期和享受 ERP 成分。与 LAA 组相比,HAA 组在行为表现期间的奖励相关加速减少,并报告在预期和获得结果期间总体上积极情绪减少。重要的是,奖励处理的神经动力学与预期快感缺失呈负相关,这在预期阶段由条件性负变(CNV)和享受阶段由反馈 P3 索引。我们的研究结果表明,非临床个体的预期快感缺失与奖励处理的预期和享受阶段的调节不良有关。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ada9/6847339/6bd308e7e8a0/nsz062f1.jpg

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