There might very well be a relationship between the "inner mind", mania, and genius. Talking with a neurophysiologist, her opinion was that many bi-polars have a sensitive limbic system (related to the emotions and the inner mind) that might account for, during periods of hypomania, increased fluency of thought, increase in memory abilities, etc.

I think there is definitely a relationship there to be explored.

Craig M. Parsons-Kerins
-The East Coast Omni-Heurist!