There have been more theories of the way the mind operates than one can go through in a timely manner - I certainly won't be going there right now. However, as touched upon in my previous post, reductionist materialism is enjoying a lot of support these days, and I certainly can't claim that it isn't for quite arguable reasons. With that having been said, however, I can't really bring myself to be alright with the two entities of 'brain' and 'mind' being thrown about as though they were interchangeable. This isn't something you only encounter under heavy deliberation - in fact, I'm currently taking a course titled "Brain, Mind, and Behavior" which (while the instructor may not be nearly as dogmatic) features a textbook that takes this concept completely as given. Why might this be done, and what problems are there with this view?
It's obvious that the brain and one's mental state are intertwined to such a degree that one seems to imply the other (note use of the term imply, in that they are related and not mutually referential). The brain regulates every activity of the body in some form or fashion, and is clearly capable of influencing cognition and behavior. Speaking empirically, a person may be so affected if any other organ in the body is manipulated or removed, but the brain is currently understood to an extent that one can produce reliably expected outcomes. For example, we have clearly identified sensory pathways within the brain, and we have identified regions of the brain which control and respond to motor functions - any structural abnormalities which may occur in these regions will produce dysfunctions of which, given the precise location, we can predict and explain with reasonable accuracy. Moreover, the prefrontal cortex is thought to house emotional and normative faculties, and a great deal of evidence supports this idea (this is often used to explain why young children, with the aforementioned brain region being underdeveloped, throw temper tantrums and very seldom make any value judgments).
Here, however, lies the trouble. These things prove that the brain provides a foundation upon which the mind can operate, but they do not deterministically prove that the brain and the mind are different names for the same thing, nor do they prove that the mind is to be found within it. This view is pushed all-too-enthusiastically by Thomas Szasz, a philosopher whose work I am currently being graded to evaluate, who actually holds that the term 'mind' refers to nothing biological or even physical, but rather to an attribution - an imaginary entity created upon which to base our moral judgments. Indeed, the terms 'mind' and 'brain' do seem intuitively to belong to two entirely different groups of ideas, and I believe that Szasz is correct in attributing the former to normative (value-laden) conversation and the latter to positive (matter-of-fact) conversation. His weaker arguments nonwithstanding (and believe me, there are plenty of them), he raises an important question of our fundamental understanding of 'mind'. Does it exist independently of our willingness to attribute our thought processes to it? Do we have minds, or do we simply mind things; in other words, do we have a particular thought-bank which ultimately comprises our personality, or do we merely think from one moment to the next (mind you, this doesn't exclude disposition of temperament, which no one is in any positino to deny - rather, it expresses the possibility that 'mind' just refers to our collection of thoughts, which Szasz believes to be just that and nothing more).
This is interesting, to me, from an evolutionary standpoint. As all higher life forms on this planet appear to have developed from a number of ancestors, and that 'intelligence' in the form that humans possess has taken some notable leaps in the course of our known (or understood) history, we can perhaps infer that 'mind' itself is an emergent property, and develops like wings or opposable thumbs. Some take the view that animals have no minds to speak of, and others disagree (I certainly do); however, regardless of one's stance here, I doubt many would (or could) reasonably compare the mind of a human being to that of a dog. Would we, then, compare the mind of a modern human to that of his/her 4 million year old ancestor? I highly doubt it - we would likely find what we would think of as 'deficiencies' in nearly every area, from emotional regulation to logical reasoning, though I would wager that they would have a far more developed sensory-orientation and more motor control. What can we take from this? Well, it seems obvious to me that one sporting either type of 'mind' would have certain strenghts and certain weaknesses, comparatively. But this, again, suggests that the mind is not a static thing, but develops as the brain and the habits of the host do (which would quite seemingly shoot down Plato's idea of the mind as eternal, static, and immortal, barring several complications).
But wait a minute...did I just attribute the mind to the physical brain? Yes - kind of. I, personally, am of the opinion that the existence of the mind independent of the brain is an absurd concept, and a hopeful confusion. Many among us certainly (and understandably) find the idea of consciousness after physical death appealing, but there is quite simply no good logical reason to believe this (sorry, Plato). Additionally, if the best one can do in providing a good reason is to appeal to the perfection and eternal being that is the idea of a 'God', suffice it to say I'm not convinced (sorry, Descartes). Mind seems to me locked inside and doomed to croaking alongside the body - but hey, it can have a good time while the candle's burning, right? With all that having been said, is the mind the brain (or is it to be found there)? No - I find this proposition equally as absurd. Why? 'Mind' does not refer to any physical entity or process, and thus equating it to or looking for it within one is a fundamental confusion. Does the mind exist? Yes - I believe it does. One can make the claim that it's simply a name we give to the process of attending to our sensory information from the outside world, and while I find this account to be somewhat appealing in its simplicity, I find it also a bit too simple. Judgment and abstract reasoning elude this hypothesis - love certainly does.
I see myself as, by and large, a fairly logical person. I often dismiss mysticisms on the very basis of their requiring faith, and find structured, sound arguments appealing (though often taken with a grain of salt). However, the 'mind' appears to me to be in a category all its own, sharing characteristics with macrocosmic biological processes such as evolution and with mysterious and inexplicable ones such as spontaneously choosing to reverse maladaptive behaviors. I see the mind as one of the very few 'magical' things left for we humans to experience, and perhaps the single, very last thing that science will never have the opportunity to objectify.

