Blood flows out and cerebrospinal fluid flows into the sleeping brain | Science News

During non-REM sleep, oxygen-rich blood (colored red) flows out of the brain just before a wave of cerebrospinal fluid (blue) rolls in, entering from a lower part called the fourth ventricle. That cerebrospinal fluid may help clean harmful proteins out of the brain.

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Video: Laura Lewis, N. Fultz et al/Science 2019

Category: Technology
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