Why you can remember every word of a song from 25 years ago – but not why you walked into the room

While driving recently, a long-forgotten song came on the radio. I found myself singing along; not only did I know all the lyrics to a song I hadn’t heard in 25 years or more, but I also managed to rap along. How is it that I could give this rendition, but often cannot remember what I came into the room for?

It is tempting to treat these moments as evidence of cognitive decline. A quiet, creeping sense that something is slipping. But the contrast between flawlessly (it was) performing a decades-old song and forgetting a just-formed intention is not a sign that memory is failing. It is a demonstration of how memory works.

We tend to talk about “memory” as if it were a single thing. It isn’t.

Remembering song lyrics relies on long-term memory – networks distributed across the brain that store information consolidated over years. These include language areas in the temporal lobes, auditory cortex, motor regions involved in speech production, and emotional circuits of the brain that help tag experiences as meaningful.

Music is neurologically extravagant: it recruits multiple systems at once – rhythm, language, movement and emotion. That multiplicity strengthens encoding.

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This is a fascinating story. Even people with dementia can sing every word to their favorite song from decades ago.

What is it about the healing power of music? Is music therapy a real thing? Can we train our brain with the right playlist?

Why Music Might Help Keep the Brain Healthy as We Age