睡前思维内容和觉醒状态对睡眠质量的影响——来自睡眠脑电的证据

Effects of Pre-Sleep Thought Content and Arousal State on Sleep Quality—Evidence from Sleep Electroencephalography

摘要: 本研究基于正常睡眠群体，探索其睡前思维内容和觉醒状态对个体睡眠质量的影响。问卷研究部分，随机选取了301名被试并对其自然发生的各类睡前思维内容进行系统性分析，采用结构方程模型探究在反刍思维和觉醒程度的作用下，睡前思维内容对个体睡眠质量的影响机制。脑电研究部分，选取其中20名被试参与睡眠脑电实验，以非快速眼动期低频节律θ、α活动的降低作为个体认知觉醒的生理指标，依托其对睡眠质量的影响进行模型验证。结合主观报告和客观脑电数据，本研究发现，当个体睡前思考有关担忧或焦虑性的思维内容(包括“对于焦虑的焦虑”、“睡眠焦虑”等)时更易陷入反刍思维，引起个体持续的心理与生理唤醒，延长个体入睡时间并影响其睡眠质量。

Abstract: Based on the normal sleep group, this study explored the effects of their pre-sleep thought content and arousal state on individual sleep quality. In the questionnaire part of the study, 301 subjects were randomly selected and their naturally occurring pre-sleep thoughts were systematically analyzed, and structural equation modeling was used to explore the mechanism of pre-sleep thought content’s influence on individual sleep quality under the effect of rumination and arousal level. In the EEG part of the study, 20 subjects were selected to participate in the sleep EEG experiments, and the reduction of low-frequency rhythm theta and alpha activities in the non-rapid eye movement period was used as a physiological indicator of individual cognitive arousal, relying on its effect on sleep quality for model validation. Combining subjective reports and objective EEG data, this study found that individuals are more likely to fall into ruminative thinking when they think about worry or anxious thoughts (including “anxiety about anxiety”, “sleep anxiety”, etc.) before going to bed, which induces persistent psychological and physiological arousal, prolongs sleep onset and affects sleep quality.