Abstract
Sleep is a succession of two stages: slow-wave and rapid eye-movement sleep. The later has mixed characteristics between sleep and wakefulness. Therefore, dreams have been proposed to occur during this stage. This hypothesis is now considered as oversimplified. Dreaming may occur during the two stages though with different characteristics. Deciphering brain structures associated with dreaming is difficult. However, during the two stages, a decrease in low-frequency and an increase in high-frequency electrical activity in posterior cortical regions has been reported that might be the neural correlate of dreaming. The origin of cortex stimulation is under debate, but the mechanisms involved are similar to those acting during wakefulness. Dream function is not known and it might be an epiphenomenon originating from synaptic transmission noise. Depriving subjects of rapid-eye movement sleep for two weeks has no apparent effect on their behavior.
Highlights
The origin of cortex stimulation is under debate, but the mechanisms involved are similar to those acting during wakefulness
Dream function is not known and it might be an epiphenomenon originating from synaptic transmission noise
Depriving subjects of rapid-eye movement sleep for two weeks has no apparent effect on their behavior. ‡
Summary
Quelle conscience a le rêveur ? Qu’est-ce qui déclenche le rêve ? La veille précédant le sommeil et l’environnement du dormeur affectentt-ils le contenu des rêves ? Et surtout, à quoi sert le rêve ? « Nous connaissons beaucoup de comment sans que cela nous autorise à connaître le pourquoi » disait le médecin neurophysiologiste Michel Jouvet, spécialiste français du sommeil paradoxal [1]. La veille précédant le sommeil et l’environnement du dormeur affectentt-ils le contenu des rêves ? Quelle activité extraordinaire que le rêve ! En rupture avec nos activités de veille, nous sommes transportés dans un monde que ne régissent plus les règles ordinaires. Nous vivons consciemment des aventures, que, malheureusement, nous oublions le plus souvent dès notre réveil. Dans l’Antiquité, les rêves que déchiffraient les prêtres, annonçaient le futur, alors qu’au XXe siècle, selon la théorie freudienne, c’est le passé qui les code. Nous consacrons en effet au sommeil environ un tiers de notre vie et, chaque nuit, une partie de ce temps est occupée par une activité onirique. Les mécanismes cérébraux mis en jeu lors de cette activité onirique sont-ils les mêmes que pendant la veille ?. Vignette (Photo © Inerm – Fanny Dégeilh). 1 Réveillé pendant un rêve, il est possible de le raconter
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
