An recent news article on LiveScience suggests that there is a part of the brain responsible for aspects of Spirituality.
Essentially it centres around the right parietal lobe in in a section that is responsible for self-awareness, responsible for defining “me”. It is this section which quietens down through deep meditation and in situations where self-awareness is lost, such as various transpersonal and transcendental experiences.
Read the entire article: http://www.livescience.com/health/081224-brain-spirit.html