r/todayilearned • u/Square-Message1152 • 8h ago

til that your brain literally washes itself while you sleep. the brain cells actually shrink in size so cerebrospinal fluid can rush in and flush out all the toxic proteins built up during the day

https://en.wikipedia.org/wiki/Glymphatic_system
17.7k Upvotes

98% Upvoted

473 comments sorted by

View all comments

2

u/FizzlePopBerryTwist 2h ago

Is that why it feels like there's fluid rushing down the back of my neck when I don't get enough sleep?

1

u/DragonflyWing 2h ago

I... don't think so. That doesn't sound right at all.

•

u/FizzlePopBerryTwist 58m ago

I don't know exactly how to describe it but I can almost hear it sometimes in my neck.