non-REM sleep


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Related to non-REM sleep: NREM sleep, NREM, REM Cycle, Non rapid eye movement

non-REM sleep

(nŏn′rĕm′)
n.
A period of sleep characterized by decreased metabolic activity, slowed breathing and heart rate, and the absence of dreaming. Non-REM sleep occurs in the first four of the five stages of the sleep cycle, followed by REM sleep, during which dreaming occurs. Also called NREM sleep, orthodox sleep.

non-REM sleep

Sleep during the intervals between perios of rapid eye movement during which there is no dreaming and the tone is high in the postural muscles.
References in periodicals archive ?
Instead, we found the protein deposited in the brain region responsible for the generation of deep, non-REM sleep.
PGO waves occur during the transition from non-REM sleep to REM sleep or during REM sleep itself.
These studies found that patients with FMS had abnormality in delta wave in the deepest phase of sleep, as well as electroencephalogram (EEG) pattern of non-REM sleep which is disrupted by alpha waves of 10-12 cycles/second.
The following vPSG data were obtained and analyzed: awakenings; total sleep time (TST); sleep efficiency (SE); sleep latency (SL); REM sleep latency (REML); wake after sleep onset (WASO); percentage of sleep spent in non-REM sleep stage (NREM) 1, NREM2, NREM3, and REM sleep; arousal index; apnea-hypopnea index (AHI); minimal oxygen saturation (SaO[sub]2); mean SaO[sub]2; and the percentage of time spent at SaO[sub]2 <90% (time − [SaO[sub]2 <90%]).
The misinterpretation of a non-REM sleep parasomnia as suicidal behavior in an adolescent.
While alcohol has a natural sedative effect that might help you go to sleep initially, it can exacerbate sleeplessness because it disturbs the balance between REM sleep (lighter sleep that includes dreaming) and non-REM sleep (deep sleep), preventing the brain from performing the normal restorative job it does overnight.
(b) Hypnogram from the entire night illustrating the sleep stages; W: wakefulness, R: REM, N1-N3: non-REM sleep (stage 1-3), Sp[O.sub.2]: oxygen saturation, and EtC[O.sub.2]: end tidal carbon dioxide.
One potential neural mechanism by which this could occur is replay, a phenomenon where neural activity patterns in the hippocampus evoked by a previous experience reactivate spontaneously during non-REM sleep, leading to coordinated cortical reactivation.
Ltd., manufacturer of PharmaGABA and supplying partner of Mitsubishi International Food Ingredients Inc., has published the results of a 2014 crossover-based, single-blind, randomized and placebo-controlled trial series that reveals the relationship between [gamma]-Aminobutyric acid (GABA) and both the time it takes to achieve sleep, and the length of non-REM sleep.
The first sleep cycle of the night goes through non-REM sleep and through REM sleep in about ninety minutes.
"What we showed is that these neurons triggered all aspects of REM sleep, including muscle paralysis and the typical cortical activation that makes the brain look more awake than in non-REM sleep."
Another consideration relates to the dynamics of neuronal circuits during wakefulness, REM and non-REM sleep, and sedation.