> The findings [...] are the first to suggest that the brain’s well-known ebb and flow of blood and electrical activity during sleep may also trigger cleansing

> The findings [...] are the first to suggest that the brain’s well-known ebb and flow of blood and electrical activity during sleep may also trigger cleansing waves of blood and CSF Oops, I guess the article or researchers missed the prior work on this subject... here's a TED Talk from 6 years ago about this exact mechanism (much more informative than the article): https://youtu.be/b8uvrdBrdR4 https://youtu.be/b8uvrdBrdR4 Gotta say though, I'm ecstatic more research is being done in this area and I wholeheartedly support their efforts!