The Journal of neuroscience : the official journal of the Society for Neuroscience
March 18, 2026
Christine Blume, Marina Dauphin, Maria Niedernhuber et al.
During sleep, the human brain transitions to a "sentinel processing mode," enabling the continued processing of environmental stimuli despite the absence of consciousness. We employed advanced information-theoretic analyses, including mutual information (MI) and co-information (co-I), alongside event-related potential (ERP) and temporal generalization analyses (TGA), to characterize auditory...
Clocks & Sleep
February 28, 2022
Angelina Birchler-Pedross, Sylvia Frey, Christian Cajochen et al.
Growing evidence indicates an association between reduced dream recall and depressive symptomatology. Here, we tested the prediction that reduced dream recall in individuals experiencing major depressive disorder (MDD) is due to alterations in circadian and sleep processes. Nine young healthy women (20−31 years) and eight young unmedicated women (20−31 years) diagnosed with MDD underwent a 40 h...
International journal of psychophysiology : official journal of the International Organization of Psychophysiology
August 1, 2013
Sarah Laxhmi Chellappa, Christian Cajochen
Dreaming 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...
Journal of Sleep Research
June 1, 2012
Sarah L Chellappa, Mirjam Münch, Vera Knoblauch et al.
Ageing is associated with marked changes in sleep timing, structure and electroencephalographic (EEG) activity. Older people exhibit less slow-wave and spindle activity during non-rapid eye movement (NREM) sleep, together with attenuated levels of rapid eye movement (REM) sleep as compared to young individuals. However, the extent to which these age-related changes in sleep impact on dream...
Biological Psychology
May 1, 2011
Sarah Laxhmi Chellappa, Sylvia Frey, Vera Knoblauch et al.
Dreaming 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...
Sleep
September 1, 2009
Sarah Laxhmi Chellappa, Mirjam Münch, Katharina Blatter et al.
The ultradian NREM-REM sleep cycle and the circadian modulation of REM sleep sum to generate dreaming. Here we investigated age-related changes in dream recall, number of dreams, and emotional domain characteristics of dreaming during both NREM and REM sleep. Analysis of dream recall and sleep EEG (NREM/REM sleep) during a 40-h multiple nap protocol (150 min of wakefulness and 75 min of sleep)...