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How Muscles Are Paralyzed During Sleep

Two powerful brain chemical systems work together to paralyze skeletal muscles during rapid eye movement (REM) sleep, according to new research. The finding may help scientists better understand and treat sleep disorders, including narcolepsy, tooth grinding, and REM sleep behavior disorder.
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well I have a question
I guess u've had experience that when u sleep more u r more drowsy than sleeping less . why??
I assume it's because at the of sleep we've got more REM so we have more energy loss than a short one!
so why every one wants to encourage us to sleep more??
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