With World Dementia Week not too long ago (19-25 Sept), this week we explore how powerful music can be in treating patients with declining cognitive abilities. Music can stimulate almost every area of the brain - areas that are most affected are those that handle emotion, speech, language, memory, and more. But can music be the tool that ultimately prevents dementia? Dr Indra Selvarajah, medical music therapist and founding president of the Malaysian Music Therapy Association (MMTA), gives us the low-down.