
Dreams are a natural part of the sleep cycle. They occur most frequently during REM, or rapid eye movement sleep, a stage of the sleep cycle that occurs within 90 minutes of falling asleep and then every 90 minutes after that. During REM, your brain becomes more active than in any other sleep stage, dreaming and consolidating and processing information from the day before. While your brain is incredibly active during REM, your physical body shuts down to keep you from acting out your dreams.
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