This is unacceptable level of reasoning about such a topic, almost comically illiterate. The moment you've used the term “brain”, you'd already detached that t

This is unacceptable level of reasoning about such a topic, almost comically illiterate. The moment you've used the term “brain”, you'd already detached that thing from the rest of the body (without which it can't function — just like a spherical cow can't really live in a vacuum), drawn its borders, set limits to its functions, and so on. The same with “synapses”. So by stating that those mental objects are “real”, you've simply found that X equals X, that those things are exactly the same as they are defined. Their evident presence here is no different from the evident presence of demons inside the possessed people in the past.