Lara-Carrasco Jessica, Nielsen Tore A, Solomonova Elizaveta, Levrier Katia, Popova Ani
Sleep Research Center, Hôpital du Sacré-Coeur, Université de Montréal, Montréal H4J 1C5, Canada.
J Sleep Res. 2009 Jun;18(2):178-87. doi: 10.1111/j.1365-2869.2008.00709.x.
Rapid eye movement (REM) sleep and dreaming may be implicated in cross-night adaptation to emotionally negative events. To evaluate the impact of REM sleep deprivation (REMD) and the presence of dream emotions on a possible emotional adaptation (EA) function, 35 healthy subjects randomly assigned to REMD (n = 17; mean age 26.4 +/- 4.3 years) and control (n = 18; mean age 23.7 +/- 4.4 years) groups underwent a partial REMD and control nights in the laboratory, respectively. In the evening preceding and morning following REMD, subjects rated neutral and negative pictures on scales of valence and arousal and EA scores were calculated. Subjects also rated dream emotions using the same scales and a 10-item emotions list. REMD was relatively successful in decreasing REM% on the experimental night, although a mean split procedure was applied to better differentiate subjects high and low in REM%. High and low groups differed - but in a direction contrary to expectations. Subjects high in REMD% showed greater adaptation to negative pictures on arousal ratings than did those low in REMD% (P < 0.05), even after statistically controlling sleep efficiency and awakening times. Subjects above the median on EA(valence) had less intense overall dream negativity (P < 0.005) and dream sadness (P < 0.004) than subjects below the median. A correlation between the emotional intensities of the morning dream and the morning picture ratings supports a possible emotional carry-over effect. REM sleep may enhance morning reactivity to negative emotional stimuli. Further, REM sleep and dreaming may be implicated in different dimensions of cross-night adaptation to negative emotions.
快速眼动（REM）睡眠和做梦可能与对情绪负面事件的跨夜适应有关。为了评估REM睡眠剥夺（REMD）和梦境情绪的存在对可能的情绪适应（EA）功能的影响，35名健康受试者被随机分为REMD组（n = 17；平均年龄26.4 +/- 4.3岁）和对照组（n = 18；平均年龄23.7 +/- 4.4岁），分别在实验室经历了部分REMD夜和对照夜。在REMD前的晚上和之后的早晨，受试者对中性和负面图片进行效价和唤醒程度评分，并计算EA分数。受试者还使用相同量表和一份包含10个项目的情绪列表对梦境情绪进行评分。尽管采用了平均分割程序以更好地区分REM%高和低的受试者，但REMD在实验夜相对成功地降低了REM%。高分组和低分组存在差异——但方向与预期相反。即使在对睡眠效率和觉醒时间进行统计控制后，REMD%高的受试者在唤醒评分上对负面图片的适应性仍高于REMD%低者（P < 0.05）。EA（效价）中位数以上的受试者总体梦境负面程度（P < 0.005）和梦境悲伤程度（P < 0.004）低于中位数以下的受试者。早晨梦境的情绪强度与早晨图片评分之间的相关性支持了可能的情绪延续效应。REM睡眠可能会增强早晨对负面情绪刺激的反应性。此外，REM睡眠和做梦可能与对负面情绪的跨夜适应的不同维度有关。
