scholarly journals Oscillatory EEG Activity During REM Sleep in Elderly People Predicts Subsequent Dream Recall After Awakenings

2019 ◽  
Vol 10 ◽  
Author(s):  
Serena Scarpelli ◽  
Aurora D'Atri ◽  
Chiara Bartolacci ◽  
Anastasia Mangiaruga ◽  
Maurizio Gorgoni ◽  
...  
Keyword(s):  
Elderly People ◽  
Rem Sleep ◽  
Dream Recall ◽  
Eeg Activity ◽  
Oscillatory Eeg

Lipopolysaccharide increases EEG delta activity within non-REM sleep and disrupts sleep continuity in rats

1995 ◽  
Vol 268 (5) ◽  
pp. R1310-R1318 ◽  
Author(s):  
M. Lancel ◽  
J. Cronlein ◽  
P. Muller-Preuss ◽  
F. Holsboer
Keyword(s):  
Sleep Deprivation ◽  
Rem Sleep ◽  
Brain Temperature ◽  
Power Spectra ◽  
Eeg Activity ◽  
Eeg Power Spectra ◽  
Sleep Maintenance ◽  
Before And After ◽  
Delta Activity ◽  
Eeg Power

Activation of the immune system by microorganisms or specific microbial constituents promotes non-rapid-eye-movement (REM) sleep (non-REMS). In this study, we assessed the effects of lipopolysaccharide (LPS) on sleep duration, electroencephalogram (EEG) power spectra, and brain temperature (Tbr) in rats. Twenty-four hour recordings were made before and after intraperitoneal injection of vehicle or 30 or 100 micrograms/kg LPS at lights on. During the first 12 h after administration of both doses of LPS, Tbr was elevated, REMS duration was reduced, and non-REMS duration was unchanged, whereas the non-REMS episodes were shortened. EEG activity within non-REMS from 0.5 to 7 Hz was enhanced during hours 3-12. During the second 12-h period, the number of non-REMS and REMS episodes and the total time in both states were increased. EEG activity within non-REMS was mainly reduced in the entire frequency range (0.5-25.5 Hz). The effects of LPS did not differ between the doses. The effects of LPS on EEG power spectra are similar to those observed after sleep deprivation, i.e., a physiological intensification of non-REMS, indicating that both manipulations may activate common sleep EEG regulatory mechanisms. However, the disruption of non-REMS continuity following LPS administration at light onset contrasts the changes induced by sleep deprivation and may reflect an effect of a systemic inflammatory response on sleep maintenance.

The divorce of REM sleep and dreaming

2000 ◽  
Vol 23 (6) ◽  
pp. 922-924 ◽  
Author(s):  
Anton Coenen
Keyword(s):  
Rem Sleep ◽  
Memory Consolidation ◽  
Water Tank ◽  
Dream Recall ◽  
Active Sleep ◽  
Cerebral Activation ◽  
Considerable Evidence ◽  
Vivid Dream

The validity of dream recall is discussed. What is the relation between the actual dream and its later reflection? Nielsen proposes differential sleep mentation, which is probably determined by dream accessibility. Solms argues that REM sleep and dreaming are double dissociable states. Dreaming occurs outside REM sleep when cerebral activation is high enough. That various active sleep states correlate with vivid dream reports implies that REM sleep and dreaming are single dissociable states. Vertes & Eastman reject that REM sleep is involved in memory consolidation. Considerable evidence for this was obtained by REM deprivation studies with the dubious water tank technique.[Nielsen; Solms; Vertes & Eastman]

scholarly journals Oscillatory EEG activity induced by conditioning stimuli during fear conditioning reflects Salience and Valence of these stimuli more than Expectancy

Neuroscience ◽  
2017 ◽  
Vol 346 ◽  
pp. 81-93 ◽  
Author(s):  
J.H. Chien ◽  
L. Colloca ◽  
A. Korzeniewska ◽  
J.J. Cheng ◽  
C.M. Campbell ◽  
...  
Keyword(s):  
Fear Conditioning ◽  
Eeg Activity ◽  
Oscillatory Eeg ◽  
Conditioning Stimuli

Recall of Dreams and the Probability of Stage 1-REM Sleep

1967 ◽  
Vol 24 (2) ◽  
pp. 627-630 ◽  
Author(s):  
Wilse B. Webb ◽  
Joseph Kersey
Keyword(s):  
Rem Sleep ◽  
The Self ◽  
Dream Recall ◽  
Stage 1

The self-reported recall of night dreams of 762 Ss when asked during the day was 37.5%. The Stage 1-REM state of sleep in the last hour of sleep was obtained for 32 Ss over 3 nights. The probability of awakening or being awakened from a Stage 1-REM state during the last hour of sleep was approximately 45%. Probability of recall when aroused from Stage 1-REM is 83%. The estimated probability of dream recall as a result of a Stage 1-REM morning awakening is almost identical with the self-reported probability (.45 × .83 = 37.4).

scholarly journals Impact of attachment styles on dream recall and dream content: a test of the attachment hypothesis of REM sleep

2001 ◽  
Vol 10 (2) ◽  
pp. 117-127 ◽  
Author(s):  
Patrick McNamara ◽  
Jensine Andresen ◽  
Jill Clark ◽  
Michael Zborowski ◽  
Cheryl A. Duffy
Keyword(s):  
Rem Sleep ◽  
Attachment Styles ◽  
Dream Content ◽  
Dream Recall

scholarly journals Delta/Theta band EEG activity shapes the rhythmic perceptual sampling of auditory scenes

2020 ◽  
Author(s):  
Cora Kubetschek ◽  
Christoph Kayser
Keyword(s):  
Time Scale ◽  
Brain Activity ◽  
Theta Band ◽  
Eeg Activity ◽  
Acoustic Information ◽  
Power Prior ◽  
Oscillatory Eeg ◽  
Human Participants ◽  
Frequency Sweeps ◽  
Perceptual Weights

AbstractMany studies speak in favor of a rhythmic mode of listening, by which the encoding of acoustic information is structured by rhythmic neural processes at the time scale of about 1 to 4 Hz. Indeed, psychophysical data suggest that humans sample acoustic information in extended soundscapes not uniformly, but weigh the evidence at different moments for their perceptual decision at the time scale of about 2 Hz. We here test the critical prediction that such rhythmic perceptual sampling is directly related to the state of ongoing brain activity prior to the stimulus. Human participants judged the direction of frequency sweeps in 1.2 s long soundscapes while their EEG was recorded. Computing the perceptual weights attributed to different epochs within these soundscapes contingent on the phase or power of pre-stimulus oscillatory EEG activity revealed a direct link between the 4Hz EEG phase and power prior to the stimulus and the phase of the rhythmic component of these perceptual weights. Hence, the temporal pattern by which the acoustic information is sampled over time for behavior is directly related to pre-stimulus brain activity in the delta/theta band. These results close a gap in the mechanistic picture linking ongoing delta band activity with their role in shaping the segmentation and perceptual influence of subsequent acoustic information.

scholarly journals REM Sleep EEG Activity and Clinical Correlates in Adults With Autism

2021 ◽  
Vol 12 ◽  
Author(s):  
Katia Gagnon ◽  
Christianne Bolduc ◽  
Laurianne Bastien ◽  
Roger Godbout
Keyword(s):  
Young Adults ◽  
Rem Sleep ◽  
Spectral Power ◽  
Total Activity ◽  
Autism Spectrum ◽  
Diagnostic Interview ◽  
Repetitive Behaviors ◽  
Beta Activity ◽  
Adults With Autism ◽  
Eeg Activity

We tested the hypothesis of an atypical scalp distribution of electroencephalography (EEG) activity during Rapid Eye Movement (REM) sleep in young autistic adults. EEG spectral activity and ratios along the anteroposterior axis and across hemispheres were compared in 16 neurotypical (NT) young adults and 17 individuals with autism spectrum disorder (ASD). EEG spectral power was lower in the ASD group over the bilateral central and right parietal (beta activity) as well as bilateral occipital (beta, theta, and total activity) recording sites. The NT group displayed a significant posterior polarity of intra-hemispheric EEG activity while EEG activity was more evenly or anteriorly distributed in ASD participants. No significant inter-hemispheric EEG lateralization was found. Correlations between EEG distribution and ASD symptoms using the Autism Diagnostic Interview-Revised (ADI-R) showed that a higher posterior ratio was associated with a better ADI-R score on communication skills, whereas a higher anterior ratio was related to more restricted interests and repetitive behaviors. EEG activity thus appears to be atypically distributed over the scalp surface in young adults with autism during REM sleep within cerebral hemispheres, and this correlates with some ASD symptoms. These suggests the existence in autism of a common substrate between some of the symptoms of ASD and an atypical organization and/or functioning of the thalamo-cortical loop during REM sleep.

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