EEG activities during elicited sleep onset REM and NREM periods reflect different mechanisms of dream generation

Takeuchi, Tomoka; Ogilvie, Robert D.; Murphy, Timothy I.; Ferrelli, Anthony V.

doi:10.1016/s1388-2457(02)00385-1

Cited by 48 publications

(57 citation statements)

References 66 publications

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“…We demonstrate that the offline facilitation of dream recall can be associated with lower REM alpha activity, suggesting the relationship of specific alpha activity to sleep mentation (Takeuchi et al, 2003). Esposito et al (2004) demonstrated that dream recall was associated with lower alpha power in a non-topographic manner, which may reflect cognitive elaboration active prior to awakening.…”

Section: Rem Sleep Spectral Characteristics Of Dream Recallmentioning

confidence: 69%

Cortical activation patterns herald successful dream recall after NREM and REM sleep

Chellappa

Frey

Knoblauch

et al. 2011

Biological Psychology

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a b s t r a c tDreaming pertains to both REM and NREM sleep. However, frequency and regional specific differences in EEG activity remains controversial. We investigated NREM and REM sleep EEG power density associated with and without dream recall in 17 young subjects during a 40-h multiple nap protocol under constant routine conditions. NREM sleep was associated with lower EEG power density for dream recall in the delta range, particularly in frontal derivations, and in the spindle range in centro-parietal derivations. REM sleep was associated with low frontal alpha activity and with high alpha and beta activity in occipital derivations. Our data indicate that specific EEG frequency-and topography changes underlie differences between dream recall and no recall after both NREM and REM sleep awakening. This dual NREM-REM sleep modulation holds strong implications for the mechanistic understanding of this complex ongoing cognitive process.

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Section: Rem Sleep Spectral Characteristics Of Dream Recallmentioning

confidence: 69%

Cortical activation patterns herald successful dream recall after NREM and REM sleep

Chellappa

Frey

Knoblauch

et al. 2011

Biological Psychology

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“…Finally, some inconsistencies with previous studies (Esposito et al 2004;Marzano et al 2011a;Takeuchi et al 2003) should be interpreted in light of the use of different protocols (i.e., between-vs. within-subject designs; nocturnal sleep vs. nap protocols). Although-on the one hand-our nap protocol allowed us to repeat easier the experimental sessions in the same circadian window, on the other hand, it should be mentioned that naps could be characterized by some differences in overall sleep organization, and circadian and homeostatic processes could affect the corresponding EEG patterns.…”

Section: Discussionmentioning

confidence: 93%

“…It is well-known that we cannot have directly access on dream experience, so several works investigated the EEG pattern related to the subsequent dream reports, which are-intrinsically-retrospective (Chellappa et al 2011;Esposito et al 2004;Marzano et al 2011a;Scarpelli et al 2015a;Siclari et al 2014;Takeuchi et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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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.

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“…This paradoxical finding could be due to an increase in NREM sleep stage 2, which is the NREM sleep stage mostly connected to dream recall (Takeuchi et al, 2003). The absence of clear differences between REM sleep spectral composition before dream recall and no recall in older people may reflect a global attenuation of REM sleep Chellappa et al, 2009).…”

Section: An Old Question In Dream Research: Aging and Dream Recallmentioning

confidence: 99%

Ultradian and circadian modulation of dream recall: EEG correlates and age effects

Chellappa

Cajochen

2013

International Journal of Psychophysiology

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a b s t r a c t a r t i c l e i n f oDreaming occurs during non-rapid eye movement (NREM) and rapid eye movement (REM) sleep, which both are regulated by homeostatic, ultradian, and circadian processes. However, the magnitude of how ultradian REM and NREM sleep and its EEG correlates impact onto dream recall remains fairly unknown. In this review, we address three questions: 1. Is there an ultradian NREM-REM sleep modulation in successful dream recall, which is gated by the circadian clock? 2. What are the key electrophysiological correlates that account for dream recall during NREM and REM sleep and 3. Are there age-related changes in the ultradian and circadian regulation in dream recall and its electrophysiological correlates? Knowledge on the specific frequency and topography NREM and REM sleep differences prior to dream recall may pinpoint to the cerebral correlates that account for this cognitive process, and hint to their possible physiological meaning.

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EEG activities during elicited sleep onset REM and NREM periods reflect different mechanisms of dream generation

Cited by 48 publications

References 66 publications

Cortical activation patterns herald successful dream recall after NREM and REM sleep

Cortical activation patterns herald successful dream recall after NREM and REM sleep

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

Ultradian and circadian modulation of dream recall: EEG correlates and age effects

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