How Sleep Works - Sleep Phases and Stages
When you sleep, you cycle through two phases of sleep: rapid eye movement (REM) and non-REM sleep. The cycle starts over every 80 to 100 minutes. Usually there are four to six cycles per night. You may wake up briefly between cycles. Sleep studies use sensors to record eye movements and brain activity, which are used to classify sleep phases and stages.
Media Type: Html
- SourceUrl: https://www.nhlbi.nih.gov/subscribe/86993
- Syndication ID: 18647
- Language: English
- Source: National Heart, Lung, and Blood Institute (NHLBI)
- Date Syndication Captured: Friday, March 29, 2019 at 04:20 PM
- Date Syndication Updated: Friday, September 29, 2023 at 01:17 AM
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