Is There a Connection Between the Gut and the Brain?

There's so much going on in this conversation between the stomach and the brain. The gut is a major regulator of motivational and emotional states. We talk about a gut feeling, but how does this interaction give us emotional states as well? One one clear example of that is being hangry, right? A being a angry and hangry at the same time,. That we usually associate with in o lack of making us, putting usin in a bad mood.