Chalmers and others would say the p-consciousness is something different than neurological processes. There are very good arguments for this.Why do we need to "explain how"? Would it not be sufficient to simply "describe what"?
Lumping p-consciousness in with neurological processes is therefore problematic. One of these things is simply not like the other.
An illusionist, such as Dennett, responds by saying p-consciousness just seems like it is something different. It is reeaaally just neurological (physical) processes. There is no special sauce. It just seems like there is.
As for the describing, that simply not currently possible. Can you describe objectively how p-consciousness interacts with neurological or physiological processes?
The discussion in this thread over the past several weeks seems to indicate that most of you believe that in principle it might some day be possible. But right now, we have no clue.