Ward Marcus P, Peters Kevin R, Smith Carlyle T
Department of Psychology, Trent University, 1600 West Bank Drive, Peterborough, ON, K9J 7B8, Canada.
Exp Brain Res. 2014 May;232(5):1525-34. doi: 10.1007/s00221-013-3781-0. Epub 2013 Dec 8.
The relationship between emotional or neutral declarative memory consolidation and sleep architecture was investigated. Thirty university students (21 females) viewed negative, neutral, or positive pictures and rated their valence and arousal in the evening. Participants performed a recognition test 1 h later and then underwent overnight polysomnography. Their post-encoding sleep architecture was compared to a baseline night. Participants returned 6 days following encoding for a second recognition test. Results showed no group (Negative, Neutral, Positive) differences in recognition 1 h or 6 days following encoding. Stage 2 sleep spindle density decreased across all groups following encoding, and recognition after 6 days was positively correlated with Stage 2 sleep spindle density on both nights. There was no change in REM density in any of the groups. This is the first investigation into phasic sleep microarchitecture changes following emotional and neutral declarative learning. Future investigations may benefit from more salient emotional stimuli.
研究了情绪性或中性陈述性记忆巩固与睡眠结构之间的关系。30名大学生（21名女性）在晚上观看负面、中性或正面图片，并对其效价和唤醒程度进行评分。参与者在1小时后进行了识别测试，然后接受了整夜的多导睡眠图检查。将他们编码后的睡眠结构与基线夜晚进行比较。参与者在编码6天后返回进行第二次识别测试。结果显示，在编码后1小时或6天的识别中，各组（负面、中性、正面）之间没有差异。编码后所有组的第二阶段睡眠纺锤波密度均下降，6天后的识别与两晚的第二阶段睡眠纺锤波密度呈正相关。任何一组的快速眼动睡眠密度均无变化。这是首次对情绪性和中性陈述性学习后睡眠微结构的阶段性变化进行研究。未来的研究可能会受益于更突出的情绪刺激。
