We think that the brain rules our decision-making process but it's pretty clear from operations like this that our guts have a very profound effect on how we behave.
When you have a big meal, for example, and feel a desire to lie down, that's because about a third of your blood supply is being diverted to your guts to let them do their vital work.
Which is why, as you may have been told as a child, it's best not to do anything too vigorous till your body has had a chance to digest.
-BBC






