Results 1 to 10 of about 16,008 (302)

Paradoxical sleep deprivation increases plasma endothelin levels [PDF]

open access: yesBrazilian Journal of Medical and Biological Research, 2002
The endothelins (ET-1, 2 and 3) constitute a family of 21 amino acid peptides with potent biological activities. ET-1 is one of the most potent endogenous vasoconstrictors so far identified and its increased concentration in plasma appears to be closely ...
B.D. Palma   +3 more
doaj   +2 more sources

Sleep pattern and learning in knockdown mice with reduced cholinergic neurotransmission

open access: yesBrazilian Journal of Medical and Biological Research, 2013
Impaired cholinergic neurotransmission can affect memory formation and influence sleep-wake cycles (SWC). In the present study, we describe the SWC in mice with a deficient vesicular acetylcholine transporter (VAChT) system, previously characterized as ...
C.M. Queiroz   +9 more
doaj   +1 more source

Under the spell of Tokyo [PDF]

open access: yeslo Squaderno, 2023
Many authors have noticed and commented on the hypnotic power of cinema. Halfway between wakefulness and sleep, the spectator is placed in a paradoxical state, in a second state of hallucina- tion, trance, abandonment, fascination.
Jean-Paul Thibaud
doaj  

SLEEPING – AN EFFICIENT WAY OF PERFORMANCE SPORTSMEN RECOVERING [PDF]

open access: yesAnnals of the “Ştefan cel Mare” University: Physical Education and Sport Section - The Science and Art of Movement, 2019
Sleeping is a brain activity state characterized by temporary interruption of conscient touch with the exterior and interior, being a reverse state.
Juravle Mariana
doaj  

Chemogenetic inhibition of the medial prefrontal cortex reverses the effects of REM sleep loss on sucrose consumption

open access: yeseLife, 2016
Rapid eye movement (REM) sleep loss is associated with increased consumption of weight-promoting foods. The prefrontal cortex (PFC) is thought to mediate reward anticipation.
Kristopher McEown   +5 more
doaj   +1 more source

Comparative Perspectives that Challenge Brain Warming as the Primary Function of REM Sleep

open access: yesiScience, 2020
Summary: Rapid eye movement (REM) sleep is a paradoxical state of wake-like brain activity occurring after non-REM (NREM) sleep in mammals and birds.
Gianina Ungurean   +4 more
doaj   +1 more source

Ventromedial medulla inhibitory neuron inactivation induces REM sleep without atonia and REM sleep behavior disorder

open access: yesNature Communications, 2018
Loss of muscle tone is a distinguishing feature of paradoxical or REM sleep (PS) and is disrupted in REM sleep behavior disorder. Here the authors report that GABA/glycine inhibitory neurons in the ventromedial medulla are essential for producing PS ...
Sara Valencia Garcia   +7 more
doaj   +1 more source

Stress-induced sleep rebound: adaptive behavior and possible mechanisms

open access: yesSleep Science, 2009
The role of stress as a triggering factor for insomnia is widely accepted. However, not everybody who is submitted to a stressful event develops insomnia, which indicates that it depends on individual vulnerability.
Deborah Suchecki   +2 more
doaj   +1 more source

Abnormal electrophysiological phenotypes and sleep deficits in a mouse model of Angelman Syndrome

open access: yesMolecular Autism, 2021
Background Angelman Syndrome (AS) is a rare genetic disorder characterized by impaired communication, motor and balance deficits, intellectual disabilities, recurring seizures and abnormal sleep patterns. The genetic cause of AS is neuronal-specific loss
N. A. Copping, J. L. Silverman
doaj   +1 more source

Wide-spread brain activation and reduced CSF flow during avian REM sleep

open access: yesNature Communications, 2023
Mammalian sleep has been implicated in maintaining a healthy extracellular environment in the brain. During wakefulness, neuronal activity leads to the accumulation of toxic proteins, which the glymphatic system is thought to clear by flushing cerebral ...
Gianina Ungurean   +6 more
doaj   +1 more source

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