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在重大抑郁障碍中,在奖励预期期间,消沉的刺激前的消极性

Xi Ren¹, Evan J White², Mariah Nacke¹

¹Laureate Institute for Brain Research, Tulsa, OK, United States.

Journal of affective disorders

|July 19, 2024

概括

患有严重抑郁症 (MDD) 的人在奖励预期期间显示脑活动减少,特别是刺激前的消极性 (SPN) 幅度较小. 这表明MDD的奖励处理受损,与伴随性焦虑症患者不同.

科学领域:

神经科学是一个神经科学.
精神病学是一个精神病学.
认知科学认知科学

背景情况:

大型抑郁症 (MDD) 的特点是奖励处理功能障碍.
在MDD中,与事件相关的潜在 (ERP) 研究一直专注于获得奖励,而不是预期.
刺激前的消极性 (SPN) ERP反映了预期性大脑处理.

研究的目的:

调查MDD患者在奖励预期期间是否表现出改变的SPN振幅.
在患有MDD的个体中比较SPN幅度,MDD与并发性焦虑 (MDD + ANX) 和对照.

主要方法:

使用货币激励延迟 (MID) 任务来评估预反-SPN幅度.
在三个组中比较了SPN幅度和行为指标:MDD (n=142),MDD + ANX (n=99) 和控制 (n=37).
使用组,反类型和电极作为因素的变异混合分析.

主要成果:

控制组的反应时间比MDD和MDD+ANX组的反应时间更快.
患有MDD的个体在预测收益反时显示出较小的预反-SPN幅度,而不是MDD+ANX和控制组.
当前的MDD,不论病史或焦虑并发症,在获得反之前,与对照组相比,SPN幅度降低.

结论:

在奖励预期期间神经资源分配减少可能会将MDD与MDD + ANX和控制组区分开来.
这些发现表明,MDD中奖励预期处理中的特定缺陷.
建议对不同MDD表型背后的神经机制进行进一步研究.

关键词:

伴随性焦虑症是一种共同疾病.大型抑郁症主要是抑郁症.奖励的预期奖励的预期在负面情绪之前的刺激.

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