See this "
Through the Wormhole" video - "Your Brain on Prayer." Neuroscientist Dr.
Andrew Newberg of the University of Pennsylvania explains the neural activity of a praying person.
A few years ago I purchased Newberg's cds "
God and the Brain: The Physiology of Spiritual Experience." Newberg also teaches in UPenn's department of religious studies. He is doing some of the best work in neurotheology, the neuroscience of religious and spiritual experiences.