Sleep's benefits to emotional processing emerge in the long term
Sleep's benefits to emotional processing emerge in the long term
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DOI：
10.1016/j.cortex.2019.07.008
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发表时间：
2019-11-01
期刊：
影响因子：
3.6
通讯作者：
Zinke, Katharina
中科院分区：
文献类型：
--
作者：
Bolinger, Elaina;Cunningham, Tony J.;Zinke, Katharina
睡眠有利于情绪记忆的长期保存，即使在情绪事件发生多年后，它们也能被访问。然而，睡眠是否也会影响在检索这些记忆时引发的情绪反应（例如，通过增加自主神经活动），目前尚不清楚。在这里，我们证明了睡眠促进了与记忆相关的情绪基调的自动（心率减速）和更多认知控制的主观测量（效价评级）在一周后被检索时的连贯下降。探索性分析表明，与中性记忆相比，睡眠可能会启动情绪性记忆的神经表征增强（反映在脑电图的晚期正电位中），这种增强在一周后变得明显。这些长期影响与睡眠对情绪反应的直接影响（即编码后10小时）形成鲜明对比，与醒来一天所见的变化相比，睡眠对情绪反应的影响保持了心率减速，晚期正电位下降。综上所述，这些结果表明，在情绪经历后睡觉对与记忆相关的情绪基调有动态和持久的影响。(C) 2019 Elsevier Ltd.版权所有。
Sleep benefits the long-term preservation of emotional memories, making them accessible even years after the emotional episode has occurred. However, whether sleep also influences the emotional response that gets elicited while retrieving such memories (e.g., by increasing autonomic activity) remains unclear. Here, we demonstrate that sleep fosters a coherent decrease in both automatic (heart rate deceleration) and more cognitively controlled subjective measures (valence ratings) of the emotional tone associated with memories when they are retrieved after one week. Exploratory analyses suggest that sleep might initiate an enhancement of the neural representation of emotional compared to neutral memories (as reflected in the late positive potential of the electroencephalogram) that becomes pronounced after one week. These long-term effects are in contrast to sleep's immediate influence on the emotional response (i.e., 10 h after encoding), where heart rate deceleration was preserved and the late positive potential decreased when compared to the changes seen over a day of wake. Together, these results suggest that sleeping after an emotional experience has dynamic and protracted influences on the emotional tone associated with memories. (C) 2019 Elsevier Ltd. All rights reserved.