Maybe music can stimulate the brain. And sort of connection will bring certain moments of the patient's live. I think the most important thing is to maintain the brain working.
The treatments used are merely composed by the prescription, but there is no method that focus on the stimulation of the brain. These prescriptions just attempt to slow down the destruction of the brain cells. But it's not a care. Sometime alternative medicine do more.
Anyway, I think patients with this disease needs to be engaged about learning again the forgotten things. This can lead to trigger other emotions that help to reduce dementia and other effects of Alzheimer.