4 Stages of Sleep: NREM, REM, and the Sleep Cycle
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As your body progresses through the four stages of the sleep cycle—stages 1 through 3 (non-rapid eye movement, or NREM) and stage 4 (rapid eye ...
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- 1How Much Deep, Light, and REM Sleep Do You Need? - Healthline
- 2Sleep Basics: REM & NREM, Sleep Stages, Good Sleep ...
As you sleep, your body cycles through non-REM and REM sleep. You usually start the sleep cycle w...
- 3The Stages of Sleep: What Happens During Each - Healthline
There are two phases of REM sleep: phasic and tonic. Phasic REM sleep contains bursts of rapid ey...
- 4The 5 Stages of Sleep - Sleep Cycle Center
- 5Sleep: How Much You Need and Its 4 Stages
Each cycle contains four individual stages: three that form non-rapid eye movement (NREM) sleep a...