So I built a stegosaurus model kit, which included some factoids in the instructions. One of these factoids was that stegosaurs are not believed to have had a secondary brain in the hips to help them control their rear half after all. That was wild to me, since the whole stegosaurs and sauropods with their tiny heads needing a secondary brain for their huge bodies was commonly accepted back when I was a kid. So I looked it up, and indeed, the current hypothesis is that the cavity that the second brain was thought to occupy is used for a thing called a glycogen body. But what exactly does a glycogen body do? We’ll get back to you on that, apparently.
Isn’t that mostly pushed by the vaccines-cause-autism guy?
No idea who you are talking about, but it’s well known that we have a really large and complex neuron structure spread through our digestive system.
Nobody calls it a brain just because it’s not an organ.
There is SO MUCH to unpack on this subject. We’re just now figuring out how our gut biome influences the rest of our body and mind, as if those are separate things. :)