My father never napped and he has Dementia
My Mother In Law never napped and went into Alzheimer’s and dementia. Then she started to nap.
We could not believe how fast she lost it memory wise.
She passed her written and actual driving test, and a couple of weeks later, she was full blown Alzheimer’s. She basically didn’t recognize family members, friends and fellow church people.
My wife flew back to spend some time/a week, with her towards her mother’s end, and basically all her mother did was nap and sleep. She didn’t recognize my wife.
At the end of the week’s visit, As my wife kissed her goodbye, her mother woke up and was clear minded for close to an hour. So my wife has that pleasant memory and a good goodbye.
Her Mother died in her sleep a few weeks later.