My father in law died a couple years ago of Alzheimer's at the VA hospital here. I got in the habit of bringing my banjo when visiting because all the guys there really seemed to respond to the music even though they were in advanced stages of the disease. I still go up there and play once in a while and I know they enjoy it even though they can't say so. This is a very sad disease, it can be a very long slow process, music can help.