Slow-wave sleep: From the cell to the clinic

Léger, Damien; Debellemanière, Eden; Rabat, Arnaud; Bayon, Virginie; Benchenane, Karim; Chennaoui, Mounir

doi:10.1016/j.smrv.2018.01.008

Cited by 170 publications

(132 citation statements)

References 253 publications

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“…REM stage maintains the necessary levels of central nervous system activities, promotes a recovery with providing periodic stimulation to the brain [ 56 ] and preserves emotional memory sources selectively [ 57 ]. SWS induces an endocrine environment that could strongly support the initiation of an adaptive immune response and cleans metabolites [ 58 ]. Additionally, RNR (REM to Non-REM ratio) and SSI (Stage Shift index) were calculated as sleep indices corresponding to the sleep quality.…”

Section: Methodsmentioning

confidence: 99%

Effect of an Inflatable Air Mattress with Variable Rigidity on Sleep Quality

Shin

Kim

et al. 2020

Sensors

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Several studies, wherein the structure or rigidity of a mattress was varied, have been conducted to improve sleep quality. These studies investigated the effect of variation in the surface characteristics of mattresses on sleep quality. The present study developed a mattress whose rigidity can be varied by controlling the amount of air in its air cells. To investigate the effect of the variable rigidity of the air mattress on sleep quality, participants (Male, Age: 23.9 ± 2.74, BMI: 23.3 ± 1.60) were instructed to sleep on the air mattress under different conditions, and their sleep quality was subjectively and objectively investigated. Subjectively, sleep quality is assessed based on the participants’ evaluations of the depth and length of their sleep. Objectively, sleep is estimated using the sleep stage information obtained by analysing the movements and brain waves of the participants during their sleep. A subjective assessment of the sleep quality demonstrates that the participants’ sleep was worse with the adjustment of the air mattress than that without; however, the objective sleep quality results demonstrates an improvement in the sleep quality when the rigidity of the air mattress is varied based on the participant’s preference. This paper proposes a design for mattresses that can result in more efficient sleep than that provided by traditional mattresses.

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Section: Methodsmentioning

confidence: 99%

Effect of an Inflatable Air Mattress with Variable Rigidity on Sleep Quality

Shin

Kim

et al. 2020

Sensors

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“…Slow-wave activity was calculated as the activity within the 0.75-4 Hz band (Leger et al, 2018;Ly et al, 2016). The power spectral density was computed using a fast Fourier transform on the 5-min EEG data after artifact removal based on 4 s Hanning window, overlapped by 2 s, using Welch's method based on custom script ("pwelch" function in MATLAB 2016b).…”

Section: Data Acquisitionmentioning

confidence: 99%

“…The power spectral density was computed using a fast Fourier transform on the 5-min EEG data after artifact removal based on 4 s Hanning window, overlapped by 2 s, using Welch's method based on custom script ("pwelch" function in MATLAB 2016b). Slow-wave activity was calculated as the activity within the 0.75-4 Hz band (Leger et al, 2018;Ly et al, 2016).…”

Section: Eeg Preprocessing and Sleep Stage Scoringmentioning

confidence: 99%

Dynamic functional connectivity states characterize NREM sleep and wakefulness

Zhou

Zou

et al. 2019

Human Brain Mapping

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According to recent neuroimaging studies, temporal fluctuations in functional connectivity patterns can be clustered into dynamic functional connectivity (DFC) states and correspond to fluctuations in vigilance. However, whether there consistently exist DFC states associated with wakefulness and sleep stages and what are the characteristics and electrophysiological origin of these states remain unclear. The aims of the current study were to investigate the properties of DFC in different sleep stages and to explore the relationship between the characteristics of DFC and slow‐wave activity. We collected both eyes‐closed wakefulness and sleep data from 48 healthy young volunteers with simultaneous electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) recordings. EEG data were employed as the gold standard of sleep stage scoring, and DFC states were estimated based on fMRI data. The results demonstrated that DFC states of the fMRI signals consistently corresponded to wakefulness and nonrapid eye movement sleep stages independent of the number of clusters. Furthermore, the mean dwell time of these states significantly correlated with slow‐wave activity. The inclusion or omission of regression of the global signal and the selection of parcellation schemes exerted minimal effects on the current findings. These results provide strong evidence that DFC states underlying fMRI signals match the fluctuations of vigilance and suggest a possible electrophysiological source of DFC states corresponding to vigilance states.

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“…For high quality and restorative sleep, the depth of sleep is of particular importance. Deep sleep is called slow-wave sleep (SWS) due to its phenomenological appearance of slow waves in the EEG signal and has been related to cognitive functioning [6], the immune system [7], and mental health [8,9]. Additionally, SWS also is a critical component in the subjective rating of sleep quality [10,11].…”

Section: Introductionmentioning

confidence: 99%

Improving night-time sleep with hypnotic suggestions

Cordi

Rossier

Rasch

2018

Preprint

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Slow-wave sleep (SWS) is fundamental for maintaining our health and well-being, and SWS is typically reduced in stress-related sleep disturbances and age-related sleep disorders. We have previously reported that exposure to hypnotic suggestions before sleep effectively increases the duration of SWS during a midday nap in younger and older women suggestible for hypnosis.However, it remains unclear whether this beneficial effect of hypnosis on SWS can be generalized to night-time sleep and men. Therefore, we tested the effect of the hypnotic suggestions on SWS across an 8 hours night-time sleeping interval in 43 healthy young French-speaking subjects (19 males) of high and low suggestibility. In accordance with our previous results, listening to hypnotic suggestions before sleep increased the amount of SWS in highly suggestible subjects significantly by 13 min compared to a control condition in both genders. Particularly in the first hour, slow-wave activity was significantly increased after hypnosis as compared to the control night in high suggestible. The hypnosis-induced benefits on objective sleep parameters were also reflected in increased subjective sleep quality ratings. Our results demonstrate that hypnotic suggestions are an effective tool to deepen sleep and improve sleep quality also across a whole night of sleep in young healthy men and women. Our findings provide an important basis for the examination and potential application of hypnosis to improve deep sleep in populations with sleep disturbances.

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Slow-wave sleep: From the cell to the clinic

Cited by 170 publications

References 253 publications

Effect of an Inflatable Air Mattress with Variable Rigidity on Sleep Quality

Effect of an Inflatable Air Mattress with Variable Rigidity on Sleep Quality

Dynamic functional connectivity states characterize NREM sleep and wakefulness

Improving night-time sleep with hypnotic suggestions

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