Deliens Gaétane, Peigneux Philippe
a UR2NF - Neuropsychology and Functional Neuroimaging Research Group at CRCN - Center for Research in Cognition and Neurosciences , Université Libre de Bruxelles (ULB) , Brussels , Belgium.
Cogn Emot. 2014;28(4):698-706. doi: 10.1080/02699931.2013.844105. Epub 2013 Oct 28.
Neutral memories unbind from their emotional acquisition context when sleep is allowed the night after learning and testing takes place after two additional nights of sleep. However, mood-dependent memory (MDM) effects are not abolished after a restricted sleep episode mostly featuring non rapid-eye-movement (NREM) or rapid-eye-movement (REM) sleep. Here, we tested whether (1) one night of sleep featuring several NREM-REM sleep cycles is sufficient to suppress MDM effects and (2) a neutral mood is a sufficiently contrasting state to induce MDM effects, i.e. interfere with the recall of information learned in happy or sad states. Results disclosed MDM effects both in the post-learning sleep and wake conditions, with better recall in congruent than incongruent emotional contexts. Our findings suggest that the emotional unbinding needs several consecutive nights of sleep to be complete, and that even subtle mood changes are sufficient to produce MDM effects.
当在学习后的当晚允许睡眠，且在另外两个晚上的睡眠后进行测试时，中性记忆会与其情感获取背景分离。然而，在主要以非快速眼动（NREM）或快速眼动（REM）睡眠为主的受限睡眠时段后，情绪依赖记忆（MDM）效应并未消除。在此，我们测试了：（1）包含多个NREM-REM睡眠周期的一晚睡眠是否足以抑制MDM效应；以及（2）中性情绪是否是一种足以产生对比的状态，从而诱发MDM效应，即干扰在快乐或悲伤状态下所学信息的回忆。结果显示，在学习后的睡眠和清醒状态下均存在MDM效应，在情绪一致而非不一致的情境中回忆效果更好。我们的研究结果表明，情感分离需要连续几个晚上的睡眠才能完成，而且即使是细微的情绪变化也足以产生MDM效应。
