There are comical 'senior moments' - I have had some of those myself - searching for glasses while wearing them, that kind of thing.
There are others that aren't funny... My older sister got in a panic the last time she was up here to visit me. It turned out that she had completely forgotten how to get from the bus station to my house. Since then it has got much worse. She asked me a few months ago how long my wife and I have been married? Well, my then
girlfriend and I split up in the year 2000...
Bloody dementia, starting before the age of 70!