A–Z Glossary

Non-rapid eye movement sleep

Non-rapid eye movement sleep is a sleep state that generally progresses from lighter sleep toward deeper sleep.

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Connecting Sleep Cycles Without Full Waking

Connecting Sleep Cycles Without Full Waking

What Happens Between Infant Sleep Cycles Sleep is not a single uniform state. It alternates between non-rapid eye movement sleep, or NREM sleep, and rapid eye movement sleep, or REM sleep. NREM sleep generally becomes progressively deeper, while REM sleep is associated with greater brain activity, variable breathing, eye movements, and more active dreaming in […]