Recovery sleep after sleep deprivation almost completely abolishes dream recall
Recovery sleep after sleep deprivation almost completely abolishes dream recall
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DOI：
10.1016/j.bbr.2009.09.030
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发表时间：
2010-01-01
影响因子：
2.7
通讯作者：
Cipolli, Carlo
中科院分区：
文献类型：
--
作者：
De Gennaro, Luigi;Marzano, Cristina;Cipolli, Carlo
这项研究调查了一晚的睡眠剥夺对恢复睡眠后早上醒来时梦的回忆的影响。40名健康受试者在适应(A)、基础夜(B)和长时间清醒40h后的恢复夜(R)进行了研究。与众所周知的恢复睡眠变化(慢波睡眠-SWS-反弹，觉醒次数和快速眼动睡眠量减少)平行，人们发现几乎完全取消了梦回忆，适应和基线夜晚减少了约75%。那些成功回忆(REC)的受试者回忆起的梦的数量在不同的晚上没有显著差异。此外，性别和觉醒时的睡眠阶段既不影响REC受试者的比例，也不影响REC受试者在每晚回忆的梦境数量。最后，R夜后梦回忆的严重损害与SWS增加较大和REM睡眠持续时间较短有关。我们认为，梦回忆在R夜可能受到损害，因为：(I)夜间自发唤醒的次数较少，减少了记忆中作为提取早晨梦经验的可能线索的内容；(Ii)与其他夜晚相比，在SWS期间更多地阐述了心理经验，不那么像梦(即知觉上生动和奇怪)，因此在早晨回忆时比在快速眼动睡眠比例较高的夜晚更难获得：(Iii)梦内容作为一种特殊类型的情节信息，由于在恢复睡眠期间陈述性记忆的有效性较低，所以不那么巩固。(C)2009年，爱思唯尔出版。
The study investigated the effect of one night of sleep deprivation on dream recall at morning awakening after recovery sleep. Forty healthy subjects were studied after adaptation (A) and baseline nights (B), and a recovery (R) night following 40 h of prolonged wakefulness. Parallel to the well-known recovery sleep changes (slow-wave sleep - SWS - rebound, decreased number of awakenings and of REM sleep amount), an almost complete abolition of dream recall was found, with an around 75% decrease with respect to the adaptation and baseline nights. The number of dreams recalled by those subjects with successful recall (REC) did not significantly differ between nights. Moreover, gender and sleep stage at awakening did not affect either the proportion of REC subjects or the number of dreams recalled by REC subjects during each night. Finally, the drastic impairment of dream recall after R night was associated to a larger increase of SWS and a shorter REM sleep duration. We suggest that dream recall could have been impaired during R night because: (i) the lower number of spontaneous awakenings over the night reduced the contents available in memory as possible cues for the retrieval of dream experiences at morning; (ii) mental experiences, having been elaborated during SWS more than in the other nights, were less dreamlike (i.e., perceptually vivid and bizarre) and, thus less accessible at morning recall than those elaborated during the nights with a higher proportion of REM sleep: (iii) dream contents, as a peculiar type of episodic information, were less consolidated because of the lower effectiveness of declarative memory during recovery sleep. (C) 2009 Published by Elsevier B.V.