Roger Sperry-(1913-1944), was a psychobiologist he discovered that human beings had two separate minds. By this he was able to detect that different parts of the brain have their own role and specializes in different functions throughout the brain. Sperry studies lead him to prove that the brain works differently on either side and co-dependently work apart from eachother. In other words the left hemisphere and the right hemisphere of the brain are on separate teams each side of the brain works for its own side and has different abilities. During the early 1960’s, Sperry and other participants, including Michael Gazzagina carried out extensive experiments on an epileptic patient. In this experiment it involved disconnecting his corpus collosum
