This is where your brain got all of its cool tricks. It's from from much more ancient developmental roles of channels, gap junctions, and and neurotransmitters. It's a it's it's not just an analogy or a um or a metaphor. It's actually evolutionarily homologous.
for - adjacency - brain - learned from ancient cells (the body) - ion channels - gap junctions - ancient bacterial biofilms - the brain is built upon these and they are ancient and found in all cells, developed billions of years ago in bacterial biofilms