3 ms·

All of this seems fair, so an interesting note off of this: I find the causality/correlative arrow here interesting as no matter the direction, there is intere

• seesawtron 6y ago
  That would be interesting but I am not sure if this study is solid to even show existence of this arrow. That assumes that there are no confounding variables but just a one directional arrow either way. However several confounding variables likely exist (maybe age, maybe more things we haven't thought about) that could give rise to reduction in gray matter, change in sleeping patterns, so on and so forth. Since this is not a behavioral study where experimentalists can actually control for confounding factors (like in animal studies), this correlation/causation arrow likely is a spurious observable effect. An ideal experiment would involve studying say lab animals in a controlled setting where "everything else being equal" one group sleeps during day and other during night and then observe their gray matter. Perhaps similar studies already exist but this paper doesn't refer to anything.