期刊
BEHAVIOUR RESEARCH AND THERAPY
卷 136, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.brat.2020.103776
关键词
Emotion; Memory; Trauma; Sleep; Slow wave sleep; Spindles; PTSD; Intrusive memories; Selective gating; Directed forgetting
资金
- German Research Foundation [SO 1716/1-1]
This study found that sleep can reduce intrusive memories after trauma by supporting the selective consolidation of relevant memories. Lack of sleep impairs selective gating of relevant trauma-associated memories, enhancing intrusion development after trauma.
Recent studies show that sleep reduces intrusive memories after analog trauma. This effect is assumed to be caused by sleep's impact on memory consolidation. However, the underlying processes of this phenomenon have not been uncovered. Thus, the current study investigates the hypothesis that sleep reduces intrusive memories by supporting the selective consolidation of relevant memories. Seventy-five participants were exposed to traumatic picture stories before nocturnal sleep or wakefulness during daytime. Memory for relevant and irrelevant trauma-associated stimuli was assessed prior to and after the retention period. Consistent with the hypothesis, results demonstrate reduced memory loss for relevant as opposed to irrelevant trauma-associated stimuli after sleep but not after wakefulness. Moreover, an incremental retention benefit for relevant trauma-associated stimuli was negatively correlated with the number of intrusive trauma memories after wakefulness. These results suggest that lack of sleep impairs selective gating of relevant trauma-associated memories, thereby enhancing intrusion development after trauma.
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