It seems to be driven by norepinephrine levels,[1] which seems like it it might have some interesting implications. >Our analysis showed that norepinephrine al

It seems to be driven by norepinephrine levels,[1] which seems like it it might have some interesting implications. >Our analysis showed that norepinephrine also is a key regulator of glymphatic activity and that norepinephrine might be responsible for suppression of glymphatic during wakefulness. [1]https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4636982/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4636982/