Well, to be picky we don't know that consciousness exists in the first place (again the problem of definition arises). But if what I typically experience in my waking life is a state of consciousness I have indeed experienced periods where consciousness ceased, during non-REM sleep for one as well as during several anesthetic experiences and a few other times. Although to be fair I suppose you could argue that my memory ceased to function but not my consciousness. But that would mean that consciousness is the core of our selves yet has no memory itself. A condition I find rather futile as consciousness would then seem to simply be along for the ride entirely dependent upon the body for identity or purpose.tiassa said:(1) We don't know that consciousness ceases.
Personally, I suspect this is the case although I think of it as an imperfect reflecting device. Think of two somewhat warped mirrors at an acute angle to each other. Consciousness, in context, is the overall state of the device in time. Not to dismiss your idea of filters, they are intrinsic but as I conceive them you're still left with the unknown observer at the center.(2) I carry this weird, undeveloped notion with me that describes the brain as a filtering device, and not a generating device. In this instance I am unsure what that would say about brain as origin of consciousness. On the one hand, consciousness does originiate in the brain, but to the other consciousness becomes a symptom. Strange, that.
I also think we attribute more significance to consciousness than it really deserves. When attempting to break it down it comes apart into rather mundane pieces which are rather easily reproduced but as a whole there seems to be a synergistic effect. The problem, I think, is that consciousness is most essentially awareness of the state of being aware, which makes it infinitely reflective.
~Raithere
P.S. I'm going to have to give the filters idea more work... I feel like there's something there relating to qualia but I can't put my finger on it yet.