What are sleep cycles?
Understand the Problem
The question is likely inquiring about the nature, stages, or characteristics of sleep cycles and how they affect the brain and body.
Answer
Sleep cycles include four stages: three NREM stages and one REM stage.
Sleep cycles consist of stages that include non-REM (NREM) and REM sleep. There are typically four stages: three NREM stages and one REM stage. These cycles repeat several times during a sleep period.
Answer for screen readers
Sleep cycles consist of stages that include non-REM (NREM) and REM sleep. There are typically four stages: three NREM stages and one REM stage. These cycles repeat several times during a sleep period.
More Information
Non-REM stages include light sleep and deep sleep, preparing the brain for REM. REM sleep is crucial for dreaming and emotional processing.
Tips
A common mistake is thinking all stages occur just once per night, but they cycle several times.
Sources
- Stages of Sleep: What Happens in a Sleep Cycle - Sleep Foundation - sleepfoundation.org
- 4 Stages of Sleep: NREM, REM, and the Sleep Cycle - Verywell Health - verywellhealth.com
- Stages of Sleep: REM & Non-REM Sleep - WebMD - webmd.com
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