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As far as we know, sleep seems to be the part of the daily cycle when executive functions are resting and memories are fortifying. Many, but not all, of the functions that become dysfunctional upon sleep deprivation seem to be situated in the frontal lobe or associated with the neocortex.

My question is whether there is a correlation between percentage of the day spent sleeping and brain structure or function. Is there a correlation to IQ, EQ, any of the big five personality traits, basal activity on fMRI, relative size of frontal lobe vs whole brain, location of central sulcus etc.?

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Please do not cross-post your question. I have recommended that the one on Biology be closed. –  Chuck Sherrington May 20 '14 at 12:56
I posted it on both sites because there are in essense two different populations on the sites. People that answer questions here, because they are interested in cognition or studying it, are probably not aware of sleep patterns in ants or snails. Similarly, i doubt that biologists studying whales have a deep understanding of neuroscience. Cross-posting it is the only way to recieve a coherent answer. It was either that or post one part of, essentially the same, question on each site. If I would ask this SAME question on "Philosophy", there would be a DIFFERENT answer, right? :) –  Darko Sarovic May 20 '14 at 13:14
The de facto rule is to only post on one site at a time. If you asked about two different angles, it would be one thing, but you copied the question verbatim. That is discouraged. –  Chuck Sherrington May 20 '14 at 13:20
It is welcome on either site but not both. It's just inconsiderate to do so, even if it is not formally against the rules. You end up with a duplication of efforts and that's not fair. Simply alter what you are asking on one or the other so they are addressing the issue from different perspectives and you're golden. You can play your "the rules don't apply to me" card if you'd like, but it's not going to win over anyone here. –  Chuck Sherrington May 21 '14 at 14:37
It's really not de facto. There's a history of debate on Meta Stack Exchange that has always resolved against cross-posting. Another reason that it's a faux pas is that, like you, people often do nothing to link the related posts, which just looks shady, and like you, people often object to making a pretty trivial effort to differentiate the two questions while implicitly asking for twice the effort from the community as a whole (which includes some people like @Chuck who participate in both). It's kind of a waste of an opportunity to help bridge two communities rather than annoying each. –  Nick Stauner May 23 '14 at 1:37

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