OMG I've had long discussions about this topic and it's coming alive: Brain Transplants.... The question (different from the article) is who actually is a person that has a brain transplant, even partial? Are you still you, or the person whose brain you have... Our skills and memories live in our brain so if you got those parts of the brain, wouldn't you be that person?
"New brain implants can restore autonomy to damaged minds, but can they settle the question of whether free will exists?"
Read the Article Here