Music Therapy for Alzheimer's

Via Mind Hacks, I found this article about singing as a therapy program for Alzheimer's patients. Singing for the Brain is a business started by Chreanne Montgomery-Smith three years ago. It conducts weekly sessions where patients sing songs ranging from Broadway to the Beatles. This is related to music therapy programs for Parkinson's patients developed by Michael Thaut, though Dr. Thaut's program is more rigorous and focused on rhythmic entrainment rather than active singing.