Emotional Memory Moderates the Relationship Between Sigma Activity and Sleep-Related Improvement in Affect
Emotional Memory Moderates the Relationship Between Sigma Activity and Sleep-Related Improvement in Affect
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DOI：
10.3389/fpsyg.2019.00500
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发表时间：
2019-03-12
影响因子：
3.8
通讯作者：
Spencer, Rebecca M. C.
中科院分区：
文献类型：
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作者：
Jones, Bethany J.;Fitzroy, Ahren B.;Spencer, Rebecca M. C.
睡眠对调节情绪和情感至关重要，它还能巩固情绪记忆。这些影响背后的机制可能是重叠的。在这里，我们研究了睡眠对情感的影响是否可以通过情绪记忆巩固来调节。年轻人在午睡前观看了45张消极图片和45张中性图片，并用多导睡眠描记仪进行测量。在小睡之后，参与者观看了混合了新图片的相同图片，并表明他们是否记住了每一张图片。在初始图片观看任务前、初始图片观看任务后和午睡后，分别用积极和消极情绪量表（PANAS）测量情绪。积极情绪与消极情绪的比例在任务期间下降，在午睡期间恢复。在控制午睡前影响的情况下，NREM sigma活动显著预测午睡后影响。对负面图片的记忆缓和了这一关系，因此当记忆力低时，sigma活动和情绪之间出现正相关，而当记忆力高时则没有。这些结果表明，情绪记忆巩固影响午睡生理学和情绪之间的关系。
Sleep is essential for regulating mood and affect, and it also consolidates emotional memories. The mechanisms underlying these effects may overlap. Here, we investigated whether the influence of sleep on affect may be moderated by emotional memory consolidation. Young adults viewed 45 negative and 45 neutral pictures before taking an afternoon nap measured with polysomnography. Following the nap period, participants viewed the same pictures intermixed with novel ones and indicated whether they remembered each picture. Affect was measured with the Positive and Negative Affect Schedule (PANAS) at baseline before the initial picture viewing task, immediately following the initial picture viewing task, and following the nap. The ratio of positive to negative affect declined over the task period and recovered over the nap period. When controlling for pre-nap affect, NREM sigma activity significantly predicted post-nap affect. Memory for negative pictures moderated this relationship such that a positive association between sigma activity and affect occurred when memory was low but not when memory was high. These results indicate that emotional memory consolidation influences the relationship between nap physiology and mood.