Quazimofo said:
Yeah, pretty interesting effects when you sever the corpus callosum. Since language is primarily (but not completely) controlled in the left hemisphere, it can lead to some weird conflicts in a person's actions.
I recall reading about an experiment where they had a person with a severed corpus c., and they handed them a knife in their
right hand (left brain), and showed a picture of a spoon to their
left eye (right brain). They they asked the person to
say (left brain) what the object was... and the person would say "Knife."
But the right half of the brain disagreed. Unable to speak, it resorted to shaking the head. To this, the left half of the brain wondered aloud, "Why am I shaking my head?"