The increase in brain activity is attributable to the fact that via image streaming you are "exercising" the grossly underutilized sub-conscious or right side of your brain. Einstein would initially use his sub conscious brain when pondering a theory by means of visual and action thought...example...out running a beam of light...is E=mc2. It was after the concept was conceived that he would engage his left analytical brain to mathematically work out the rest of the puzzle.
