Researchers John Kounios and Mark Beeman found that milliseconds before an epiphany occurs the brain’s visual areas shut down. They call this a "Brain Blink." That’s why people subconsciously look down when asked a question. They are trying to reduce visual input while solving the problem, Kounios explains. Researchers also found that anxiety causes Left-Brain thinking. When stressed, the Left Brain dominates as it desperately sifts through existing files and folders to solve the problem as quickly as possible.