This is a clip of a documentary made in 2014. I just recently learned about it from a friend who is taking a course on Music and the Brain. My mother has dementia and is in the later stages where she has lost most of who she was. I tried this with her and had remarkable results in terms of her being present, responsive and relating to the music.
Somewhere in the documentary there is discussion re: loneliness and the elderly and how music can help there.
We have so many people who are suffering from illnesses that affect the brain. Music can help in so many ways. Hopefully this information will be useful to you whether you are a personal or professional caregiver or simply looking to affect your brain in a positive way!