Roger Sperry was considered a psychobiologist and discovered that the human brain is split into two different parts. He found that the left and right sides have specializations and can operate practically independently. Sperry conducted experiments on an epileptic patient who had his corpus collosum split, so that the connection was severed. At first the patient seemed normal, until they discovered that certain activities could only be done using one side of the brain or the other. He discovered that the Left Hemisphere specialized in language processes and the right in visual-construction tasks. Sperry's work helped chart a map of the brain. He received the Nobel Prize in 1981.