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Emotional Memory Consolidation During Sleep

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Cognitive Neuroscience of Memory Consolidation

Abstract

Emotional experiences have a privileged place in our memories. As humans are constantly inundated with information, this adaptive process allows for the preservation of more important emotionally salient events, while allowing less important information to be forgotten. Although the experience of emotion itself releases a bevy of neurochemical and neurophysiological reactions that can benefit memory, recent research indicates that sleep plays a vital role in the preferential processing that leads to long-term consolidation of emotional information. Behavioral, neuroimaging, and neuropsychological evidence suggests that sleep benefits the long-term storage of emotional memories by increasing activation and connectivity among the same brain regions responsible for the initial encoding of emotional experience, and by facilitating the integration of the various elements of the experience into higher level cortical networks. This chapter will review the behavioral and neurobiological evidence supporting enhanced memory for emotionally salient information and the role that sleep plays in this preferential processing. We will conclude with questions that remain in this field, highlighting areas that may be fruitful for future sleep and memory researchers to explore.

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Notes

  1. 1.

    Importantly, there we no performance differences between the 9 am and 9 pm 30 min delay groups, and thus they were collapsed.

  2. 2.

    Interestingly, participants who achieved REM during their naps also showed the most significant enhancements toward happy face stimuli, perhaps indicating a valence-dependent system. Few other studies have been able to replicate this effect, however.

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National Science Foundation (BCS-0963581) and (BCS-1539361).

Conflicts of Interest: The authors declare no competing financial interests.

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Cunningham, T.J., Payne, J.D. (2017). Emotional Memory Consolidation During Sleep. In: Axmacher, N., Rasch, B. (eds) Cognitive Neuroscience of Memory Consolidation. Studies in Neuroscience, Psychology and Behavioral Economics. Springer, Cham. https://doi.org/10.1007/978-3-319-45066-7_9

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