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选择性快速眼动睡眠剥夺对情绪记忆巩固及情感评估的影响。

The effect of selective REM-sleep deprivation on the consolidation and affective evaluation of emotional memories.

作者信息

Wiesner Christian D, Pulst Julika, Krause Fanny, Elsner Marike, Baving Lioba, Pedersen Anya, Prehn-Kristensen Alexander, Göder Robert

机构信息

Dept. of Child and Adolescent Psychiatry and Psychotherapy, Christian-Albrechts University School of Medicine, Kiel, Germany.

Institute of Psychology, Christian-Albrechts University, Kiel, Germany.

出版信息

Neurobiol Learn Mem. 2015 Jul;122:131-41. doi: 10.1016/j.nlm.2015.02.008. Epub 2015 Feb 20.

Abstract

Emotion boosts the consolidation of events in the declarative memory system. Rapid eye movement (REM) sleep is believed to foster the memory consolidation of emotional events. On the other hand, REM sleep is assumed to reduce the emotional tone of the memory. Here, we investigated the effect of selective REM-sleep deprivation, SWS deprivation, or wake on the affective evaluation and consolidation of emotional and neutral pictures. Prior to an 9-h retention interval, sixty-two healthy participants (23.5 ± 2.5 years, 32 female, 30 male) learned and rated their affect to 80 neutral and 80 emotionally negative pictures. Despite rigorous deprivation of REM sleep or SWS, the residual sleep fostered the consolidation of neutral and negative pictures. Furthermore, emotional arousal helped to memorize the pictures. The better consolidation of negative pictures compared to neutral ones was most pronounced in the SWS-deprived group where a normal amount of REM sleep was present. This emotional memory bias correlated with REM sleep only in the SWS-deprived group. Furthermore, emotional arousal to the pictures decreased over time, but neither sleep nor wake had any differential effect. Neither the comparison of the affective ratings (arousal, valence) during encoding and recognition, nor the affective ratings of the recognized targets and rejected distractors supported the hypothesis that REM sleep dampens the emotional reaction to remembered stimuli. The data suggest that REM sleep fosters the consolidation of emotional memories but has no effect on the affective evaluation of the remembered contents.

摘要

情绪促进陈述性记忆系统中事件的巩固。快速眼动(REM)睡眠被认为有助于情绪事件的记忆巩固。另一方面,REM睡眠被假定会降低记忆的情感基调。在此,我们研究了选择性REM睡眠剥夺、慢波睡眠(SWS)剥夺或清醒对情绪和中性图片的情感评估及巩固的影响。在9小时的保持间隔之前,62名健康参与者(23.5±2.5岁,32名女性,30名男性)学习并对80张中性和80张情绪消极的图片进行情感评分。尽管严格剥夺了REM睡眠或SWS,但残余睡眠促进了中性和消极图片的巩固。此外,情绪唤醒有助于记忆图片。与中性图片相比,消极图片更好的巩固在存在正常量REM睡眠的SWS剥夺组中最为明显。这种情绪记忆偏差仅在SWS剥夺组中与REM睡眠相关。此外,对图片的情绪唤醒随时间下降,但睡眠和清醒均无差异影响。编码和识别期间情感评分(唤醒、效价)的比较,以及被识别目标和被拒绝干扰项的情感评分,均不支持REM睡眠会减弱对记忆刺激的情绪反应这一假设。数据表明,REM睡眠促进情绪记忆的巩固,但对记忆内容的情感评估没有影响。

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