I also noticed the lack of evidence for this. The claim was made by the person writing about the study (link at bottom). He seemed relatively expert in the domain, so I didn’t worry about it.
I guess it seems more plausible to me that renormalization might occur when the brain is quiet (otherwise, the mechanism might need to be slightly more complicated, to suppress or ignore activity where it acts—pure speculation on my part). But some sleep cognition definitely occurs outside of REM. So on the whole I weigh it as “further study needed”—especially since this is so far in flies only.
I also noticed the lack of evidence for this. The claim was made by the person writing about the study (link at bottom). He seemed relatively expert in the domain, so I didn’t worry about it.
I guess it seems more plausible to me that renormalization might occur when the brain is quiet (otherwise, the mechanism might need to be slightly more complicated, to suppress or ignore activity where it acts—pure speculation on my part). But some sleep cognition definitely occurs outside of REM. So on the whole I weigh it as “further study needed”—especially since this is so far in flies only.