Results 31 to 40 of about 156,934 (328)

Sociality Affects REM Sleep Episode Duration Under Controlled Laboratory Conditions in the Rock Hyrax, Procavia capensis. [PDF]

open access: yes, 2017
The rock hyrax, Procavia capensis, is a highly social, diurnal mammal. In the current study several physiologically measurable parameters of sleep, as well as the accompanying behavior, were recorded continuously from five rock hyraxes, for 72 h under ...
Adhil Bhagwandin   +6 more
core   +2 more sources

Is REM Density a Measure of Arousal during Sleep?

open access: yesBrain Sciences, 2023
Rapid eye movements (REMs), an expression of REM sleep phasic activity, occur against a stable background of cortical desynchronization and the absence of axial tone. The significance of REMs during the sleep period was initially attributed to the mental
Giuseppe Barbato
doaj   +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

A predictive propensity measure to enter REM sleep

open access: yesFrontiers in Neuroscience
IntroductionDuring sleep periods, most mammals alternate multiple times between rapid-eye-movement (REM) sleep and non-REM (NREM) sleep. A common theory proposes that these transitions are governed by an “hourglass-like” homeostatic need to enter REM ...
Alexander G. Ginsberg   +6 more
doaj   +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

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

Are there sleep-specific phenotypes in patients with chronic fatigue syndrome? A cross-sectional polysomnography analysis [PDF]

open access: yes, 2013
Objectives: Despite sleep disturbances being a central complaint in patients with chronic fatigue syndrome (CFS), evidence of objective sleep abnormalities from over 30 studies is inconsistent.
Deary, Vincent   +3 more
core   +1 more source

Ostriches sleep like platypuses.

open access: yesPLoS ONE, 2011
Mammals and birds engage in two distinct states of sleep, slow wave sleep (SWS) and rapid eye movement (REM) sleep. SWS is characterized by slow, high amplitude brain waves, while REM sleep is characterized by fast, low amplitude waves, known as ...
John A Lesku   +6 more
doaj   +1 more source

A Study on REM Sleep Homeostasis in the Day-Active Tree Shrew (Tupaia belangeri): Cold-Induced Suppression of REM Sleep Is Not Followed by a Rebound

open access: yesBiology, 2023
The function and regulation of rapid-eye-movement (REM) sleep is a topic of ongoing debate. It is often assumed that REM sleep is a homeostatically regulated process and that a need for REM sleep builds up, either during prior wakefulness or during ...
Sjoerd J. van Hasselt   +6 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

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