recently (oct 07) ive noticed my dad has been going out less and less, become forgetful, unsteady on his feet, distant, has no converstaion at all. I do see him most weeks but after seeing him yesterday he has worsen so suddenly, I took him to Dr just before xmas and was told he needs to have several blood test first, and that if it is as we suspect they will come back normal!!! Im cnfused by that as they have all come back normal, he says that before a referral can be made these blood tests have to be done first. However the change in my dad is happening very very fast (well it appears to be) I realise he is 76 but I dont think its his age. he just sits vacant most of the time, wont leave the house, wont talk when he does he cant remember anything, often calls me by one of my siblings names, had a few falls, gets very agitated over little things, and snappy, He was at my house for dinner boxing day, and used his fingers on and off to eat his dinner, just got up and walk in other room when he finished he would never have done this sort of thing 6 months ago, he just sat and stared at tv which wasnt on!!! the only thing i could get his attention with was my baby grandsons musical toys, which he looked at. suddenly decided his going home and now!!! can this illness be so so sudden or have i been blind to slow signs.