A dual processor checkout system
Kenneth C. Smith · 1968
"The brain of the higher animals, including man, is a double organ, consisting of right and left hemispheres connected by an isthmus of nerve tissue. It looks as though in animals with an intact calosum (nerve tissue) a copy of the visual world as seen in one hemisphere is sent over to the other, with the result that both hemispheres can learn together a discrimination presented to just one hemisphere. When this connector between the two halves of the cerebrum was cut, each hemisphere functioned independently as if it was a complete brain...."