Those who say there's nothing after death, aren't you a little bit puzzled by what happens to your perception of nothing? You suddenly cease to exist, how's that going to be? It's paradoxical. How can you experience non-existence? Or how can you not experience existence?
I think that paradox is the basis for any belief in a life after death.
If all brain function ceases, all life processes stop permanently, then it is very likely that there is no more "you." You can't perceive if you can't think.