I find bicameralism interesting. When I was younger and religious I could experience a particularly pious state of mind where the internal monologue became more of a very pronounced internal dialogue. It was as if the primary conscious part of my brain could ask a question and get a linguistic (seeming) response from some other part of the brain.

The internal dialog wasn't smarter or supernatural or anything, but it was interesting. I would like to know if any research has been done to try to induce this state of mind, and then find a location (if one exists) of the internal dialogue using fMRI.