You know, Alzheimer's patients can sing songs they learned many years ago.
The memory part of singing is physiological. You learn from voicing the words aloud
through muscle memory of the lips, teeth, tongue and other aspects of vocal production.
Have you noticed that you can remember songs that you learned long ago easier than those just learned recently?

I believe that music is a healing therapeutic agent and have seen it do wonders for people in need of help or not. It's revelatory to see people in nursing homes who enter not speaking to anyone suddenly get up and sing a song they learned years ago. This is an agent that
helps bring them back into a social community.