Brain Reactivity Differentiates Subjects with High and Low Dream Recall Frequencies during Both Sleep and Wakefulness

Eichenlaub, Jean-Baptiste; Bertrand, Olivier; Morlet, Dominique; Ruby, Perrine

doi:10.1093/cercor/bhs388

Cited by 88 publications

(141 citation statements)

References 61 publications

Supporting

Mentioning

121

Contrasting

Order By: Relevance

“…These data confirmed that regions involved in the regulation of emotional memory may be the same across sleep and wakefulness. As a further support to this hypothesis, a PET study disclosed that High Recallers (HR) showed a greater regional cerebral blood flow (rCBF) in temporoparietal junction (TPJ) and medial prefrontal cortex than Low Recallers (LR; Eichenlaub et al 2014b). This region is involved in the "Default Mode Network" (DMN), activated during resting state, daydreaming and mental imagery processes (Desseilles et al 2011;Domhoff 2011;Eichenlaub et al 2014b).…”

Section: Discussionmentioning

confidence: 90%

Predicting Dream Recall: EEG Activation During NREM Sleep or Shared Mechanisms with Wakefulness?

et al. 2017

View full text Add to dashboard Cite

The common knowledge of a uniqueness of REM sleep as a privileged scenario of dreaming still persists, although consolidated empirical evidence shows that the assumption that dreaming is just an epiphenomenon of REM sleep is no longer tenable. However, the brain mechanisms underlying dream generation and its encoding in memory during NREM sleep are still mostly unknown. In fact, only few studies have investigated on the mechanisms of dream phenomenology related to NREM sleep. For this reason, our study is specifically aimed to elucidate the electrophysiological (EEG) correlates of dream recall (DR) upon NREM sleep awakenings. Under the assumption that EEG activity predicts the presence/absence of DR also during NREM sleep, we have investigated whether DR from stage 2 NREM sleep shares similar brain mechanisms to those involved in the encoding of episodic memory during wakefulness, or it depends on the specific electrophysiological milieu of the sleep period along the desynchronized/synchronized EEG continuum. We collected DR from a multiple nap protocol in a within-subjects design. We found that DR is predicted by an extensive reduction of delta activity during the last segment of sleep, encompassing left frontal and temporo-parietal areas. The results could represent an update on the mechanisms underlying the sleep mentation during NREM sleep. In particular, they support the hypothesis that an increased cortical EEG activation is a prerequisite for DR, and they are not necessarily in conflict with the hypothesis of common wake-sleep mechanisms. We also confirmed that EEG correlates of DR depend on a state-like relationship.

show abstract

Section: Discussionmentioning

confidence: 90%

Predicting Dream Recall: EEG Activation During NREM Sleep or Shared Mechanisms with Wakefulness?

et al. 2017

View full text Add to dashboard Cite

show abstract

“…During sleep, between-group differences were also observed for auditory evoked potentials (AEPs) to the same stimuli, at the latency of the P3a in N2 and at later latencies during all sleep stages. Finally, at the behavioral level HR showed more intra-sleep wakefulness (ISW) than LR (~15 min more on average, see Eichenlaub et al, 2014a). …”

Section: Introductionmentioning

confidence: 97%

“…For more than a century, researchers have investigated whether some psychological parameters could explain dream recall frequency variability (for a review see Ruby, 2011), but it’s only recently that physiological parameters have been considered. Using Electroencephalogram (EEG) and PET we found neurophysiological differences between high dream-recallers (HR) and low dream-recallers (LR) during both sleep and wakefulness (Ruby et al, 2013b; Eichenlaub et al, 2014a,b). Notably, during wakefulness, in response to auditory novel stimuli, the attention-orienting brain response (P3a) and a late parietal component were found to be larger in HR than in LR.…”

Section: Introductionmentioning

confidence: 99%

“…We proposed that this link could be subserved by the amplitude of the brain response to external stimuli (Eichenlaub et al, 2014a), and hypothesized that large neurophysiological responses to sounds during sleep are responsible for subsequent awakenings. Indeed, Bastuji et al (2008) demonstrated that during sleep (N2 and rapid eye movements (REMs)), the amplitude of a late parietal positive component (450–650 ms) in response to painful stimulation was significantly enhanced in trials that were followed by an arousing reaction (be it a short arousal of 3–15 s or an awakening lasting more than 15 s).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Increased Evoked Potentials to Arousing Auditory Stimuli during Sleep: Implication for the Understanding of Dream Recall

Vallat

Lajnef

Eichenlaub

et al. 2017

Front. Hum. Neurosci.

Self Cite

View full text Add to dashboard Cite

High dream recallers (HR) show a larger brain reactivity to auditory stimuli during wakefulness and sleep as compared to low dream recallers (LR) and also more intra-sleep wakefulness (ISW), but no other modification of the sleep macrostructure. To further understand the possible causal link between brain responses, ISW and dream recall, we investigated the sleep microstructure of HR and LR, and tested whether the amplitude of auditory evoked potentials (AEPs) was predictive of arousing reactions during sleep. Participants (18 HR, 18 LR) were presented with sounds during a whole night of sleep in the lab and polysomnographic data were recorded. Sleep microstructure (arousals, rapid eye movements (REMs), muscle twitches (MTs), spindles, KCs) was assessed using visual, semi-automatic and automatic validated methods. AEPs to arousing (awakenings or arousals) and non-arousing stimuli were subsequently computed. No between-group difference in the microstructure of sleep was found. In N2 sleep, auditory arousing stimuli elicited a larger parieto-occipital positivity and an increased late frontal negativity as compared to non-arousing stimuli. As compared to LR, HR showed more arousing stimuli and more long awakenings, regardless of the sleep stage but did not show more numerous or longer arousals. These results suggest that the amplitude of the brain response to stimuli during sleep determine subsequent awakening and that awakening duration (and not arousal) is the critical parameter for dream recall. Notably, our results led us to propose that the minimum necessary duration of an awakening during sleep for a successful encoding of dreams into long-term memory is approximately 2 min.

show abstract

“…The data used in this study consists of polysomnographic (PSG) records in 15 healthy subjects aged 29.2 ± 8 years, which were collected at the DyCog Lab of the Lyon Neuroscience Research Center (Lyon, France) as part of a larger study exploring cognition during sleep (Eichenlaub et al, 2012(Eichenlaub et al, , 2014Ruby et al, 2013a,b). Each record contains EOG, EMG and 21 scalp-EEG channels.…”

Section: Polysomnographic Data Basementioning

confidence: 99%

Learning machines and sleeping brains: Automatic sleep stage classification using decision-tree multi-class support vector machines

Lajnef

Chaibi

Ruby

et al. 2015

Journal of Neuroscience Methods

Self Cite

282

164

View full text Add to dashboard Cite

Brain Reactivity Differentiates Subjects with High and Low Dream Recall Frequencies during Both Sleep and Wakefulness

Cited by 88 publications

References 61 publications

Predicting Dream Recall: EEG Activation During NREM Sleep or Shared Mechanisms with Wakefulness?

Predicting Dream Recall: EEG Activation During NREM Sleep or Shared Mechanisms with Wakefulness?

Increased Evoked Potentials to Arousing Auditory Stimuli during Sleep: Implication for the Understanding of Dream Recall

Learning machines and sleeping brains: Automatic sleep stage classification using decision-tree multi-class support vector machines

Contact Info

Product

Resources

About