How sleep works: what pulls you to bed, and what your brain does all night
Deep sleep: what happens to the sleep pressure while you sleep
Stay awake a whole day and a night, and your first hours of sleep are mostly deep sleep. What is your brain doing in all that deep sleep?
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1
Your jar of sleep pressure is fuller than it has been in years. Now your brain gets to empty it.
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While you sleep, the adenosine goes down, and the big slow waves of deep sleep follow the level of the jar: the fuller the jar, the deeper and longer the deep sleep.
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