non-rapid eye movement sleep

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non-rapid eye movement sleep

Non-REMS sleep. See Sleep stages.

non–rapid eye movement sleep

Abbreviation: NREM sleep
Sleep during which non–rapid eye movements occur. Dreams do not occur in NREM sleep. It has four stages: in stage 1, the transition from wakefulness to sleep occurs; eye movements are slow, and an electroencephalogram (EEG) shows low brain wave activity. In stage 2, EEG activity is increased, and spikes called K complexes appear. In stage 3, eye movement ceases; wave frequency is reduced and amplitude increased. In stage 4, the EEG is dominated by large spikes (delta rhythm). Stages 3 and 4 are considered deep sleep. Synonym: synchronized sleep See: rapid eye movement sleep; sleep
See also: sleep

Non-rapid eye movement (NREM) sleep

A type of sleep that differs from rapid eye movement (REM) sleep. The four stages of NREM sleep account for 75-80% of total sleeping time.
Mentioned in: Sleep Disorders
References in periodicals archive ?
These occur due to abnormal transitions between the three primary states of being wake, rapid eye movement (REM) sleep, and non rapid eye movement (NREM) sleep.
Non rapid eye movement sleep arousal parasomnias include confusional arousals, sleep terrors (pavor nocturnus) and sleepwalking (somnambulism).
DEPRESSION: Feeling low affects hormone levels and the sleep cycles of Non Rapid Eye Movement (NREM) and Rapid Eye Movement (REM) sleep are often unbalanced.
THE two main distinctive phases of sleep are Non Rapid Eye Movement (NREM) sleep, interspersed with much shorter periods of Rapid Eye Movement (REM) sleep.

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