non-REM sleep


Also found in: Dictionary, Wikipedia.
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 ?
Dan is continuing her studies of the neurons that affect not only REM sleep, but also non-REM sleep.
Sexsomnia might be included as a diagnostic specifier when criteria for non-REM sleep arousal disorder, sleepwalking type, are met and accompanied by evidence of sleep-related sexual behavior.
In contrast, non-REM sleep is the phase that is important for memory consolidation, so it might also play a role in this form of sleep-learning.
The team used Polysomnography to assess brain-wave activity, REM and non-REM sleep, and sleep apnea by measuring breathing disturbances and levels of oxygenation during sleep.
5'UMP is known to encourage both REM and non-REM sleep.
Volunteers were tested in the morning and again in the afternoon after either a nap with REM sleep, one with non-REM sleep, or a quiet rest period.
The major division is that between rapid eye movement (REM) sleep and non-REM sleep.
There are two kinds of sleep--REM (rapid eye movement) sleep and non-REM sleep.
The first volume, containing 11 chapters, deals with neurophysiological research into REM (rapid eye movement) stage dreams and non-REM dreams and includes chapters surveying the history of neurophysiological research into dreams, cellular and molecular models, drug effects, neuroimaging, dream characteristics and the frontal lobe, the interaction of dream content with REM Behavior Disorder, physiologies and dream characteristics of REM and non-REM sleep states, and changes in dream recall and content associated with neurological disorders.
The majority of non-REM sleep is obtained in the first half of the night's sleep, whereas REM predominates in the latter half of the sleep period.
In contrast, the subjects reported either absence of dream or recollection of a fragmentary and thought-like mention, when awakened from non-REM sleep (7).
Results: There were no significant differences in the groups for total sleep time, sleep efficiency, sleep latency, rapid eye movement (REM) latency, percentage of stage 1 non-REM sleep and REM sleep.