Question

why do human dream in night only ​

Answer 1

Answer:

Dreams can happen at any time during sleep. But you have your most vivid dreams during a phase called REM (rapid eye movement) sleep, when your brain is most active. Some experts say we dream at least four to six times a night. A lucid dream is one in which you know you're dreaming.

Explanation:

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Answer 2

because the amygdala is more active during sleep than in your waking life, it may be the brain's way of getting you ready to deal with a threat. Fortunately, the brainstem sends out nerve signals during REM sleep that relax your muscles. That way you don't try to run or punch in your sleep.

Amygdala means = a roughly almond-shaped mass of grey matter inside each cerebral hemisphere, involved with the experiencing of emotions.