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How biological rhythm effect on rapid eye movement and non rapid eye movement?

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What is non-rapid eye movement sleep?
Non-rapid eye movement (NREM) sleep-- A type of sleep that differs from rapid eye movement (REM) sleep. The four stages of NREM sleep account for 75-80% of total sleeping time.
What is rapid eye movement sleep?
Rapid eye movement (REM) sleep-- A phase of sleep during which the person's eyes move rapidly beneath the lids. It accounts for 20-25% of sleep time. Dreaming occurs during REM sleep.
What is rapid eye movement?
sleeping
Why do we have rapid eye movement?
We have it because that is when we dream.
When does rapid eye movement occur?
Rapid eye movement (REM) occurs when you are asleep and when you are dreaming your eyes move to see the images in your dream which your brain is thinking of. Usually 25% of sleeping is dreaming and...