[ QUOTE ]
Having a brain transplant is(in a sense) no different than having a heart transplant.

[/ QUOTE ]

... only that having a heart transplant wouldn't change your memories, your emotions/feelings, your knowledge/intelligence, or your personality/temperment; but having a brain transplant would change all of those things. And what am "I", if not those things. In fact, a lot of religions would call those things, the "soul". People have heart transplants all the time... and they seem to be the same person. But, a victim of a serious stroke, or Alzheimer's disease, has a different brain, and doesn't seem to be quite the same person as before.