This makes me wonder whether we might be moving away from the idea (or belief) that mind or consciousness is located solely in the brain. Which, I would suggest, is more in line with our actual experience; we feel fear and anxiety in our stomachs, and we feel heartache in, well, the heart.
In Chinese medicine, in fact, different organs are associated with different emotions. The heart is associated with excitement, for instance, the lungs with grief, and the main digestive organ, the Pi (sometimes rather misleadingly translated as Spleen) with overthinking. The idea is partly that an unnatural excess of a certain emotion can over time lead to a deterioration of the function of the corresponding organ. So for instance someone who is overwhelmed by grief may start to suffer from, say, asthma; another person who perhaps pursues a life of non-stop frenetic excitement may end up with heart palpitations. Personally I don’t think we need take this too literally, but the truth that emotions affect bodily functions is obvious to anyone with a modicum of self-awareness; and the connection between the Pi and overthinking is reminiscent of the idea of the digestive tract as the ‘little brain’.
Of course there are a number of English expressions which also point to this correspondence between the brain and the guts; we speak, for instance, of food for thought and, more recently, of ‘all you can eat’ data. So if we want or need to be able to think clearly, one of the things we need to do is to look after our digestion.