We can actually show that consciousness persists even when surrounded by shielding that would prevent the passage of any known particle or radiation except neut

We can actually show that consciousness persists even when surrounded by shielding that would prevent the passage of any known particle or radiation except neutrinos from affecting whatever is inside. If you shut off all outside signals, the brain works just fine, there's no effect at all. (Except maybe the stress of whatever situation you're in that landed you in a super shielded bunker. )