split-brain technique

n. The process cutting the corpus callosum, which is the largest of the three major connections between the two sides of the cortex of brain, which partially disconnects the right and left cerebral hemispheres. A few humans have had surgery to accomplish this in order to forestall severe epileptic seizures, which increase each time they cross the corpus callosum. It has also been done in numerous laboratory animals in order to study the mostly independent functioning of the two halves of the cerebral cortex.