Randomness of memory loss

I am glad that there is so much research dedicated to alzheimer's/dementia. However it still appears to be so random. I just returned from a funeral this weekend for my grandmother who lived to the ripe age of 92. No memory problems, definitely health problems. Annie, my mother, the alzheimer's vicitm continues to lose language ability daily. Today she had to tell me about friends coming to see her, but started with a sentence declaring "it's hot in there" which after about fifteen minutes circled around that friends were at the house next door. It simply seems that this disease continues to be cruel. However there is still a funny and intense person inside that body. One of my mother's favorite things to do is show us her pretty underwear (don't worry not while she is wearing it). She brought out a pair the other morning showing off how "pretty" they were then proceeded to put them on her head to make us all laugh. There was my mama being silly. I will leave it at that.