The 'divided brain' refers to a phenomenon which has been observed in neurological testing in a few individuals who have undergone the corpus callosotomy procedure, a neurosurgical technique used to treat epileptic seizures. In these cases, the connection between the two hemispheres of the brain, the corpus callosum, has been severed, leading to a neuropsychological phenomenon where information is processed differently in each hemisphere. This bicameral perspective of processing is thought to give rise to a variety of differentiated experiences and behaviours, leading to the general phenomenon of the 'divided brain'.

See also: right hemisphere, left hemisphere, corpus callosum, split brain, hemispheric hypothesis