Kumral Deniz, Palmieri Jessica, Gais Steffen, Schönauer Monika
Institute of Psychology, Neuropsychology, University of Freiburg, Freiburg im Breisgau, Germany.
BrainLinks-BrainTools, University of Freiburg, Freiburg im Breisgau, Germany.
iScience. 2025 Jul 1;28(8):113032. doi: 10.1016/j.isci.2025.113032. eCollection 2025 Aug 15.
Dreams incorporate recent experiences, and memory-related brain activity is reactivated during sleep, suggesting that dreaming, memory consolidation, and reactivation are tightly linked. We devised a paradigm to investigate whether memory reprocessing during sleep contributes to dreaming. Participants listened to different audiobooks before falling asleep, introducing dissimilar experiences to be processed at night. We show that audiobook content was reprocessed at the neural level using multivariate pattern analyses. Brain activity during rapid eye movement sleep, particularly in the beta range, carried information about the audiobook. While the amount of neural reinstatement did not correlate with memory retention, global beta power during REM sleep was associated with better memory performance. Moreover, blind raters could determine which audiobook participants had studied based on dream reports. Participants who dreamt of the audiobook also showed stronger neural reinstatement. Reprocessing of pre-sleep experiences during sleep may thus shape our brain activity, our dreams, and our memories.
梦境包含近期经历，且与记忆相关的大脑活动在睡眠期间会被重新激活，这表明做梦、记忆巩固和重新激活紧密相连。我们设计了一种范式来研究睡眠期间的记忆再处理是否有助于做梦。参与者在入睡之前听不同的有声读物，从而引入不同的经历以便在夜间进行处理。我们通过多变量模式分析表明，有声读物的内容在神经层面得到了再处理。快速眼动睡眠期间的大脑活动，尤其是在β波段，携带了有关有声读物的信息。虽然神经恢复的程度与记忆保持无关，但快速眼动睡眠期间的整体β功率与更好的记忆表现相关。此外，不知情的评分者可以根据梦境报告确定参与者学习的是哪本有声读物。梦到有声读物的参与者也表现出更强的神经恢复。因此，睡眠期间对睡前经历的再处理可能会塑造我们的大脑活动、梦境和记忆。
