Hi Susan its me Lin (Groundhog Lin)
My Mum was dead to me years before she died - she had Alzheimers Disease. It was heartbreaking to visit her, to be asked by her, who are you? your own Mum.
It was a little time ago, and I dindt know about recording things, but someone suggested that I make up a scrap book of personal things, what I knew about her history, her wedding photos, holiday photos, her children, major events in her life etc. so that she could have it in the hospital/home and nursing staff just might see it and regard her as a person, rather than just a number. I did make it up, but she died before it was needed. BUT I still look at it, and think fondly of the time when she WAS my Mum. It has been a huge source of comfort.
So I would support wholeheartedly the kind of recording that has been mentioned, either for you or for her family at a future time.
Love and hugs Lin