Dementia is very sad and hard on the nearest and dearest. However is was considered to be 'normal', in days gone by, for some people to lose their marbles as they got old. Nowadays, the word, 'Alzheimers' is bandied about but originally it meant 'pre-senile' dementia, ie affecting younger people. My neighbour's mum developed (if that is the right word) Alzeheimer's Disease when she was in her early sixties. Thankfully she was never aggressive, she just became more and more vague, not knowing anything or recognising anyone, and was eventually bedridden. It was terribly sad for all concerned, her husband was devoted to the last.
More research needs to be put into Alzheimer's Disease, which means more money.
I've nowt else to say. A friend of mine's mum was diagnosed with Alzheimer's and eventually died but my friend found it difficult to accept that her previously intellectual mother was no more. She did die peacefully, I am glad to say. My aunt also had the same diagnosis but she was 90 and I am not sure that is an accurate diagnosis, Alzheimer's is supposed to be 'pre-senile dementia'. She had lived a long healthy life and was fit for most of it, it was only at the very end she did not know what she was doing, and was well cared for.
We all hope it never happens to us.
Largely, I agree with floo on this one. Of course we can pray, if we believe in prayer, but we need to be practical and support medical research. They are not mutually exclusive.