Sleep selectively stabilizes contextual aspects of negative memories

Cox, Roy; Bronkhorst, Marthe L. V. van; Bayda, Mollie; Gomillion, Herron; Cho, Eileen; Parr, Elaine; Manickas-Hill, Olivia P; Schapiro, Anna C.; Stickgold, Robert

doi:10.1101/370965

Cited by 2 publications

(2 citation statements)

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“…Therefore, we defined our sample size using a heuristic procedure (Lakens, 2022 ), which was based on reviewing the literature about sleep and emotional memory. Considering the 34 studies included in the meta‐analysis by Schäfer and colleagues 2020 ), the majority of the studies on this topic had a sample size between 12 participants per group or condition (Goldschmied et al, 2015 ; Wagner, Kashyap, Diekelmann, & Born, 2007 ) to 24 participants per group or condition (Ashton, Harrington, Smith, & Cairney, 2019 ), with some exceptions with a larger sample size (Baran et al, 2012 ; Bennion, Payne, & Kensinger, 2016 ; Cox et al, 2018 ). For example, Sopp, Michael, and Mecklinger ( 2018 ), using a similar protocol to ours (two groups, three testing periods, a recognition task with neutral and unpleasant stimuli), recruited 23 participants per group, similar to our sample sizes.…”

Section: Discussionmentioning

confidence: 99%

The role of sleep and wakefulness in the recognition of emotional pictures

Carollo

Degasperi

Cellini

2022

Journal of Sleep Research

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Sleep has a beneficial effect on memory consolidation. However, its role in emotional memory is currently debated. Here, we investigate the role of sleep and a similar period of wakefulness on the recognition of emotional pictures and subjective emotional reactivity. Forty participants without any major physical, neurological or psychological condition were randomly assigned to the Sleep First Group or Wake First Group. The two groups underwent the encoding phase of an emotional images task with negative and neutral pictures at either 09:00 hours (Wake First Group) or 21:00 hours (Sleep First Group). Then participants performed an immediate recognition test (T1), and two delayed tests 12 hr (T2) and 24 hr (T3) later. Perceived arousal and valence levels were collected for each picture. Sleep parameters were recorded at participants' homes with a portable device. No differences were observed at T1, whereas at T2 the Sleep First Group showed a higher memory performance than the Wake First Group. At T3, performance decreased in the Sleep First Group (who spent the previous 12 hr awake), but not in the Wake First Group (who slept during the previous 12 hr). Overall, negative images were remembered better than neutral ones. We also observed a positive association between memory performance for negative items at the immediate test and the percentage of rapid eye movement sleep the night before the encoding. Our data confirm that negative information is remembered better over time than neutral information, and that sleep benefits the retention of declarative information. However, sleep seems not to preferentially improve emotional memory, although it may affect the encoding of negative information.

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Section: Discussionmentioning

confidence: 99%

The role of sleep and wakefulness in the recognition of emotional pictures

Carollo

Degasperi

Cellini

2022

Journal of Sleep Research

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“…2016 ; Lehmann et al. 2016 ; Cox et al. 2018 ), it has remained unclear how these processes are implemented neurophysiologically.…”

Section: Discussionmentioning

confidence: 99%

Sharp Wave-Ripples in Human Amygdala and Their Coordination with Hippocampus during NREM Sleep

Cox

Rüber

Staresina

et al. 2020

Cerebral Cortex Communications

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Cooperative interactions between the amygdala and hippocampus are widely regarded as critical for overnight emotional processing of waking experiences, but direct support from the human brain for such a dialog is absent. Using overnight intracranial recordings in four pre-surgical epilepsy patients (three female), we discovered ripples within human amygdala during non-rapid eye movement (NREM) sleep, a brain state known to contribute to affective processing. Like hippocampal ripples, amygdala ripples are associated with sharp waves, linked to sleep spindles, and tend to co-occur with their hippocampal counterparts. Moreover, sharp waves and ripples are temporally linked across the two brain structures, with amygdala ripples occurring during hippocampal sharp waves and vice versa. Combined with further evidence of interregional sharp wave and spindle synchronization, these findings offer a potential physiological substrate for the NREM-sleep-dependent consolidation and regulation of emotional experiences.

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Sleep selectively stabilizes contextual aspects of negative memories

Cited by 2 publications

References 67 publications

The role of sleep and wakefulness in the recognition of emotional pictures

The role of sleep and wakefulness in the recognition of emotional pictures

Sharp Wave-Ripples in Human Amygdala and Their Coordination with Hippocampus during NREM Sleep

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