Why do dementia patients remember music?

Someone who can’t always place the people around them hears a song from sixty years ago and sings every word of the verse. If you’ve watched that happen, with a parent or with a resident you care for, it’s natural to wonder how the song is still there.

There’s a possible reason, from a 2015 brain-scan study. The researchers scanned 32 healthy young adults while they listened to music, and found the two areas of the brain most involved in recognizing songs a person has known for a long time. Then they looked at those same two areas in 20 people with Alzheimer’s disease and 34 healthy older people. In the people with Alzheimer’s, those areas had shrunk less, and were still using energy more normally, than most of the rest of the brain.

The areas were mapped in young people, though, and the researchers didn’t test what the people with Alzheimer’s could actually remember. They only go as far as saying their result may explain what families see.

Two researchers who study music and dementia asked for some caution in a 2015 review. They wrote that the popular picture of music as an untouched island in the brain goes further than the research does, and that careful studies were “very scarce”. They also pointed out that there are several kinds of musical memory, and that different dementias affect them differently.

So it may not happen the same way for everyone. In another 2015 study, of 73 people with different forms of dementia, about half had changed in how they responded to sound. In the people with Alzheimer’s disease, the change the researchers saw was a new dislike of everyday sounds.

In one small French study, music seemed to help memories come back. In 2012, researchers asked young adults, older adults and people with probable Alzheimer’s disease to recall events from their own lives, once after hearing music they had chosen and once in silence. After the music, the memories came faster, were more specific and carried more feeling.

The two researchers behind the 2015 review also wrote that music remains unusually good at bringing back memories and feelings, and that it gives caregivers a way to connect with someone without words.

In the trials so far, music hasn’t clearly improved memory. The Cochrane review of music programs for people with dementia covered 30 trials and 1,720 people in its 2025 update, and its authors found no clear effect on thinking and memory. The authors of the 2015 review had already noted that in larger trials, music sometimes did no better than other pleasant activities.

So a person may remember every word of a song, and that doesn’t mean the music is bringing other memories back for good. Sharing a song they still know can be a special moment for the people who love them, though. That’s worth a lot, even though it isn’t a treatment.

It’s most likely the songs from when they were young. In a 2024 study, 112 older adults rated songs from the 1950s to the 1980s, and the ones that felt most personal had come out when each listener was about 10 to 30. These were healthy older adults, though, and not people with dementia.

We book musicians who play the songs from the years residents were young, and they take requests as they go. Want to know what researchers found when musicians played for residents? Check out our post on live music for memory care residents.