Neurotheology is an emerging field of study within the spectrum of neuroscience, which can also be termed as "biology of religion." It addresses the relationship between the brain (or, the entire physical organism) as an anatomical (structural) and physiological (functional) entity; and religion, including spiritual experience, and behaviour modulated by belief. Neurotheology demands attention within the province of neuroscience precisely because it insists upon the precise demarcation of a neural substrate for affective phenomena usually termed 'spiritual'.