More can be written on this, but you might be interested in "When and how did it become common knowledge that the head/brain is the seat of thought?" , with an answer by /u/hillsonghoods . (Thanks there, hillsonghoods, for updating your profile, so my wiki search found the link fast!) For comparison, there's a link to their previous article on the heart.

This is not to discourage discussion. Further questions, data, and debate are welcome.