I played at a memory unit nursing home for a year every monday until covid hit and they would not allow us back in. I was always amazed these folks would sing right along with the songs we played and even mostly knew the words. But by next monday they would not remember who we were.
So I was talking to a High School Band teacher about this and he told me there had been studies about this. It seems one of the last things the human brain remembers might be music that has been embedded in our minds since childhood. Think "You Are My Sunshine" as an example.


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