There are three minds in a body - Brain, heart and gut. When they work together in harmony it produces a great body and powerful mind.
Since dawn of civilization, humans have always expressed love, feelings and emotional pain coming from the heart and basic feeling or intuition coming from the gut. Hence the expressions broken heart, gut feeling etc. Rationalists and scientists have scoffed at these expressions saying they are only metaphors, but recent researches suggest that they may have scientific explanations.
It seems both heart and gut have a mind of their own and besides communicating with the brain about their activities they might also be helping in brain development, reducing depression and just increasing the level of well being of a person.