Watch Spinal Fluid ‘Wash’ the Sleeping Brain in Rhythmic, Pulsing Waves

During sleep, waves of oxygenated blood (red) and then cerebrospinal fluid (blue) wash over the brain.(Image: © Laura Lewis])

This link is fascinating; it shows the brain being washed by the spinal fluid in rhythmic, pulsing waves. One of the many functions and sequencing that are being discovered. The first few paragraphs follow.
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What happens to your brain as you sleep? A new video holds the answer: A juicy mix of blood and cerebrospinal fluid slosh through your smushy noggin in a rhythmic pulsating dance. 

The movement appears almost tidal in a video released Oct. 31 along with an article in the journal Science. Though researchers knew that brain activity takes on a rhythmic pattern during sleep, this video and study mark the first time anyone has observed a similarly rhythmic flow of cerebrospinal fluid. 

“We’ve known for a while that there are these electrical waves of activity in the neurons,” study co-author Laura Lewis, a professor of biomedical engineering at Boston University, said in a statement. “But before now, we didn’t realize that there are actually waves in the CSF, too.”
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By Stephanie Pappas – Live Science Contributor November 13,
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