this post was submitted on 12 May 2025
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[–] [email protected] 37 points 9 hours ago* (last edited 9 hours ago) (1 children)

The brain flushes cerebrospinal fluid through itself during sleep, cleaning out spent fuel (beta, tau, amyloids and such). Buildup of amyloids in the brain is linked with Alzheimer's disease. Anything the fluid touches activates neurons so the body has to be immobilized for the process otherwise you'll flail around during the sleep process (See: Sleepwalking and night terrors). Memory consolidation and repair also occur in this stage. The optical clusters are so important for survival in evolution, they are never turned off, so dreams occur as the fluid hits neurons causing rapid eye movements (REM).

There was a BBC article/paper I read like a decade ago talking about the role/function of sleep in animals/organisms.

That first long morning piss? That's all spent brain fuel.

If I got something wrong feel free to correct me, I'm going off years old information from the Interwebs__