rem sleep
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Sleep Cycles: How Your Sleep Patterns are Regulated
Most people never think about sleep cycles until they begin feeling the impact of not getting an adequate amount of sleep. In fact, there are some people who only know of REM sleep because they hear about it in movies, read about it in books, or watch shows on television that mention it. However, they have little knowledge of what it means or how different sleep cycles impact their mental and physical health and well-being....
