You Aren’t Who You Think You Are

…each hemisphere of the brain exercises free will independently when surgeons cut the corpus callosum. Gazzaniga discovered this with a simple experiment. When he flashed the word “WALK” in the right hemisphere of split-brain patients they walked out of the room. But when he asked them why they walked out all responded with a trivial remark such as, “To go to the bathroom” or “To get a Coke.” Here’s where things got weird. When he flashed a chicken in patients’ left hemisphere in the right visual field and a wintry scene in their right hemisphere in the left visual field, and asked them to select a picture that goes with what they saw, he found that their left hand correctly pointed to a snow shovel and their right hand correctly pointed to a chicken. However, when the patients were asked to explain why they pointed at the pictures they responded with something like, “That’s easy. The shovel is for cleaning up the chicken.”

via “Who’s There?” Is The Self A Convenient Fiction? | Why We Reason.