While we cannot even conceive of the existence of the brain and it’s functions independently of the mind…
Rather, I think the truth is vice-versa of this. We cannot conceive of the existence of the mind and its functions independently of the brain. Cognitive science is showing this more and more every day, and anybody who has experienced an older loved one with dementia, such as that which results from Alzheimer’s disease, knows this intuitively.
…(because it is in the mind, and only in the mind, that conceptions are manifested)…
True , and this is the manifestation of the u deying reality of brain activity.
…to reduce the physical to the mental, as idealists do, is to completely abandon external, mind-independent reality. Thus we slip into the intolerable despair of solipsism.
Well said, and true, but not particularly relevant to the idea of the mind as the product of brain activity.
So we arrive at the point where mind and body, consciousness and objective physical reality, are interdependent.
Yes, very good! Thoughts and emotions in the mind which are produced by the brain do, indeed, affect the body, including having a reflexive effect of the function of the brain itself. This is why someone who is severely depressed feels muddled, and that they cannot think properly.