An Auburn University researcher teamed up with the National Institutes of Health to study how brain networks shape an individual’s religious belief, finding that brain interactions were different between religious and non-religious subjects. (Source)
The study can be found here: Brain Networks Shaping Religious Belief.
This study is based on fMRI imagery and thus is essentially speculative since fMRIs provide little more than shadows of blood flow in the brain. That said, it is interesting.