This article provides a nice summary of neuroscientific studies of religious experiences (such as meditation, religious ecstasy, etc): God is in the Dendrites: Can "neurotheology" bridge the gap between science & religion?
Here lies the answer:
Out of politeness, perhaps, or a hope for future Templeton grants, neurotheologists tend to play down the most direct implication of their research—that religious ecstasy is an illusion.However, these studies are totally fascinating!
P.S. the cartoon of a praying brain is also very cool.