Neurotheology?
The Mystical Mind: Probing the Biology of Religious Experience, by Eugene D'Aquili and Andrew B. Newberg
A century ago the psychologist William James identified what he saw as a common core in religious experience, universal across cultures, and he argued (in The Varieties of Religious Experience) against a "medical materialism" that would reduce and dismiss such experience. Since that time many have tried to understand religion through the study of religious experience, and many, like James, have given special attention to mysticism.