1.0Glossaryhttps://www.healthbenefitstimes.com/glossaryGlossaryhttps://www.healthbenefitstimes.com/glossary/author/adminglossary/Non rapid eye movement sleep - Definition of Non rapid eye movement sleeprich600338<blockquote class="wp-embedded-content" data-secret="91nTswe1LU"><a href="https://www.healthbenefitstimes.com/glossary/non-rapid-eye-movement-sleep/">Non rapid eye movement sleep</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.healthbenefitstimes.com/glossary/non-rapid-eye-movement-sleep/embed/#?secret=91nTswe1LU" width="600" height="338" title="“Non rapid eye movement sleep” — Glossary" data-secret="91nTswe1LU" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script>
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Period of sleep during which no rapid eye movement occurs; about 75-80% of nighttime sleep.Sleep during which nonrapid eye movements occur. In NREM 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, with the appearance of spikes called K complexes. Eye movement ceases in stage 3; wave frequency is reduced and amplitude increased. In stage 4, the EEG is dominated by large spikes, or delta activity. Stages 3 and 4 are considered deep sleep.The stage of sleep during which the eyes move very little and the body gradually reaches its state of deepest relaxation.A form of sleep that distinguishes itself from rapid eye movement (REM) sleep is under discussion. The four phases of non-rapid eye movement (NREM) sleep constitute approximately 75–80% of the overall duration of sleep.