The gut and brain communicate bidirectionally, influencing each other's functions and perceptions.

“Because as I mentioned before, your gut is communicating all the time with your brain and your brain is communicating all the time with your gut. And so the two are in this ongoing dance with one another, that ordinarily is below your conscious detection although you're probably familiar with the experience of every once in a while getting a stomach ache or of eating something that doesn't agree with you, or conversely eating something that you find particularly delicious and that sensation or that experience rather being a whole body experience.”