My grandad had alzheimers, and it is one of those horrible situations where the 'person' dies long before the body does. But because the body is all that one has left, one keeps looking for sense in the words that come in the familiar voice, looking for coherence in the responses and actions. Hoping that they don't understand what is happening to them, as it is so terribly undignified and often intrusive. But for the little that they do understand, talking to them and staying with them and doing anything that you possibly can for them. It is just what happens when you care about someone. Caring, supportive, interested and respectful medical staff (like you) make it possible. Keep up the good work.