The brain is a network of electrically interacting cells. As such, no "center" will ever be found. What is the "center" of a swarm of ocean fish? Which one fish is the coordinator of all others? None. And yet they move in a coordinate manner with mathematical precision, while each does his own thing. The shape and behaviour of the swarm is an emergent property of the behaviour of the individual fish. The total is more than the sum of the parts...
I think this concept is one many people just tend to overlook or fail to intellectually appreciate, as they tend to focus on the impressiveness of so-called "spotlight" conscious awareness, overlooking how much of our "minds" are of the unconscious or subconscious type.
And, of course, the totality of our "minds" constantly changes, as nothing stands perfectly still in all of reality - though certain patterns change at different rates and some give the appearance of solidity and "sameness" over time, in the short run. E.g., no one can step into the same river or stream because both the person and the stream are different from moment to moment.
... in the hierarchy of nature, the brain is the necessary part for a mind to emerge. And once it has, brain and mind are locked in a feed-back loop. (no brain=no mind)...
Here's where Occam's Razor comes into play. No one to date (to my knowledge) has shown in a publically sharable way an example of a, so to speak, "free-floating" mind sans a brain. I.e., one can have a brain without a mind, but where is mind to be had without a brain?
So, when we detect "mind" it is always in a brain. Lacking any other evidence, or a less complicated but sufficient theory, then we can only conclude that mind emerges from brain - that is their obvious relationship - that, and the feedback entailed so that they both, in effect, evolve together.
The only other theory I have heard of is the television transmission analogy - that "mind" or "spirit" or "soul" or "life force" comes from some other mysterious diminsion and that the brain "merely"serves as the transmission point into our mundane or physical reality - that, and the brain serves as a "housing" for the immaterial "substance".
No real explanation is ever given for how this works, exactly, it's just believed as truth because it is flattering, and thus became a part of early pre-scientific human culture, and is now passed on generation to generation, in apparently all societies, inculcated in humans (children) at that formative stage wherein naivete allows nearly any idea, no matter how out of bounds with observed reality, to be so inculcated.
One would need to explain why "spirit' would prefer the brain to be the point of transmission or housing, rather than the foot or the liver, or any other body part. Until then, Occam's Razor cuts this notion out - for the thinking person.
