Psychologist and neuroscientist Stephen M. Kosslyn has made a revolution in the previous division of the brain - he has replaced the right and left hemisphere theory with a division into upper and lower brain. Kosslyn described his observations in a book published with G. Wayne Miller entitled "Top Brain, Bottom Brain: The Brain of the Right Brain". he described his observations in his book "Top Brain, Bottom Brain: Suprising Insights Into How You Think.