Brain activity differentiates subjects with high and low dream recall frequencies during both sleep and wakefulness : ERPs and PET studies
1 : Centre de recherche en neurosciences de Lyon
Université Jean Monnet - Saint-Etienne, Université Claude Bernard - Lyon I, Université de Lyon, CNRS : UMR5292, Inserm : U1028
CH Le vinatier, 95 bd Pinel, bat B13 59 69677 Bron cedex -
France
2 : Centre d'Exploration et de Recherche Médicales par Émission de Positons
(CERMEP)
-
Website
Inserm, CNRS, Hospices Civils de Lyon, CHU Saint-Etienne, CHU Grenoble, Université Claude Bernard - Lyon I, Université Jean Monnet - Saint-Etienne, Université Joseph Fourier - Grenoble I
59 bd Pinel, 69003 Lyon -
France
3 : Unité d'Exploration Hypnologique
* : Corresponding author
INSERM U1028
CH le Vinatier, Lyon, France -
France
Dreaming is still a mystery of human cognition. In the fifties, dreaming was associated with rapid eye movement (REM) sleep (Dement & Kleitman 1957; Sastre & Jouvet 1979) but this hypothesis which cannot explain all the characteristics of dream reports has been challenged (Solms 1997; Nir & Tononi 2010). We used event-related potentials (ERPs) and positron emission tomography (PET) during wakefulness and sleep, to measure brain activity in subjects who report dreams frequently (Dreamers, D) versus rarely (Non-Dreamers, ND). During EPRs data acquisition, participants (18 D and 18 ND) passively listened to sounds while they were either watching a silent movie or sleeping at night. PET data were acquired in the afternoon while participants (21 D and 20 ND) were resting (wakefulness) or sleeping (N2, N3 and REM sleep). ERPs results revealed that the primary steps of auditory processing (N1 and MMN) match in Dreamers and Non-Dreamers. However, latter responses, reflecting higher cognitive processing, dramatically differ in the two groups during pre-sleep wakefulness and during sleep. In the PET study, D vs ND contrast showed rCBF increases in TPJ during REM sleep, N3, and wakefulness, and in MPFC during REM sleep and wakefulness. This study reveals for the first time functional neuroanatomical correlates of the ability to recall dreams in healthy subjects and argue in favor of the forebrain "dream-on" hypothesis (Solms 2000). Results of the two studies support the hypothesis that high/low dream recall frequency is associated with particular cerebral functional organisation independent of the state of vigilance
| Subject : | : | Poster |
| Topics | : | PO: Executive functions 2 |
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