It turns out that the EEG indicates that the brain has made the decision some few thousandths of a second before subjects "know" they have decided. So why bother with consciousness at all? Couldn't that fantasy creature, a mindless zombie, do the job just as well?
For Antonio Damasio, the answer seems to be a convergence: consciousness happens in the brain where the self (or selves I'd add) are mapped, creating a narrative out of experience. Full story at the link above.