Be careful, in your thought, of getting carried away by speculative analogy, which can induce you to look past the measurement and observation of the object of inquiry. In terms of subjectivity we are not aware of a good deal of what the brain does--we just don't "experience" consciously everything that happens to/in the brain. This doesn't necessarily mean that you are incorrect, but your argument is basically a modification of the homunculus argument of old. The "true us", as you put it in your argument, seems to have no qualities or attributes other than its ability, due to some connection, to receive signals. Why must the immaterial be invoked in order for "something" to receive signals (in your case, SELECTIVELY receiving signals only dealing with the senses, thought, imagination, memory, and emotion, while ignoring a good deal of other signals), when the brain already does that with the upshot of actually doing something with said signals and utilizing a broader band of signals?
