Results 61 to 70 of about 696,853 (368)

Melanin-concentrating hormone (MCH): a new sleep factor?

open access: yesFrontiers in Neurology, 2011
Neurons that utilize the neuropeptide melanin-concentrating hormone (MCH) as a neuromodulator are mainly located in the lateral hypothalamus and the incerto-hypothalamic area, and have widespread projections throughout the brain.
Pablo eTorterolo   +2 more
doaj   +1 more source

A Fast-Slow Analysis of the Dynamics of REM Sleep

open access: yes, 2012
Waking and sleep states are regulated by the coordinated activity of a number of neuronal population in the brainstem and hypothalamus whose synaptic interactions compose a sleep-wake regulatory network.
Booth, Victoria, Diniz Behn, Cecilia G.
core   +1 more source

a previously undescribed entity [PDF]

open access: yes, 2015
Background: There are few studies describing periodic limb movement syndrome (PLMS) in rapid eye movement (REM) sleep in patients with narcolepsy, restless legs syndrome, REM sleep behavior disorder, and spinal cord injury, and to a lesser extent, in ...
Gaede, Gunnar   +5 more
core   +1 more source

Coordination of cortical and thalamic activity during non-REM sleep in humans

open access: yesNature Communications, 2017
Every night, the human brain produces thousands of downstates and spindles during non-REM sleep. Previous studies indicate that spindles originate thalamically and downstates cortically, loosely grouping spindle occurrence.
R. Mak-McCully   +8 more
semanticscholar   +1 more source

Chronic escitalopram treatment attenuated the accelerated rapid eye movement sleep transitions after selective rapid eye movement sleep deprivation: a model-based analysis using Markov chains [PDF]

open access: yes, 2014
BackgroundShortened rapid eye movement (REM) sleep latency and increased REM sleep amount are presumed biological markers of depression. These sleep alterations are also observable in several animal models of depression as well as during the rebound ...
A Novati   +83 more
core   +2 more sources

Orexin-1 receptor blockade dysregulates REM sleep in the presence of orexin-2 receptor antagonism

open access: yesFrontiers in Neuroscience, 2014
In accordance with the prominent role of orexins in the maintenance of wakefulness via activation of orexin-1 (OX1R) and orexin-2 (OX2R) receptors, various dual OX1/2R antagonists have been shown to promote sleep in animals and humans.
Christine eDugovic   +5 more
doaj   +1 more source

Single‐channel EEG classification of sleep stages based on REM microstructure

open access: yesHealthcare Technology Letters, 2021
Rapid‐eye movement (REM) sleep, or paradoxical sleep, accounts for 20–25% of total night‐time sleep in healthy adults and may be related, in pathological cases, to parasomnias.
Irene Rechichi   +4 more
doaj   +1 more source

Comparing the cardiac autonomic activity profile of daytime naps and nighttime sleep. [PDF]

open access: yes, 2018
Heart rate variability (HRV) is a reliable technique to evaluate autonomic activity and shows marked changes across a night of sleep. Previous nighttime sleep findings report changes in HRV during non-rapid eye movement sleep (NREM), which have been ...
Mednick, Sara C   +2 more
core   +3 more sources

A rare case of REM sleep-related bradyarrhythmia syndrome with concomitant severe hypertension: a case report and a review of literature

open access: yesActa Medica Lituanica, 2018
Introduction. Rapid eye movement (REM) sleep-related bradyarrhythmia syndrome is characterized by pathological asystoles during the REM sleep phase. It is a rare rhythm disorder, being reported only few times in the literature.
Gabrielius Jakutis   +6 more
doaj   +1 more source

Characterization of Sleep Stages by Correlations of Heartbeat Increments

open access: yes, 2002
We study correlation properties of the magnitude and the sign of the increments in the time intervals between successive heartbeats during light sleep, deep sleep, and REM sleep using the detrended fluctuation analysis method.
A. Bunde   +45 more
core   +1 more source

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