George Johnson asks: Can "neurotheology" bridge the gap between religion and science? He gives an excellent summary of relevant experiments that measure or induce brain activity correlated with meditative, religious, or estatic states to conclude:
So it goes, round and round. Either the brain naturally or through a malfunction manufactures religious delusions, or some otherworldly presence speaks to homo sapiens through the language of neurological pulses. Hot in pursuit of this undecidable proposition, neurotheology will keep on churning out data—but when it comes to the biggest questions, it will never have much to say.