We have an Alzheimer's Unit that is a part of the ALF where I live. I wish we had more like this here. At one time we did have a former Rockette and she could do those high kicks when her therapist could get her going.
It is great when these former artists awaken time to time. We don't get to see much of it since they are in a separate unit.
Music stimulates the brain. When i drove Bus for senior center, one client was a pianist. Every day after she ate lunch she'd go to the piano to play. When playing you could see her coming into self awareness again. And the other clients seemed to love it too.