My paternal grandmother's mother had "dementia." Her daughter, my grandmother, who died of Alzheimer's, had three children, my father, an aunt, and an uncle. All three of the siblings had Alzheimer's... All three of their families were watching each other to see who got it in our generation. We all know the signs too well. Not a good feeling for a while... It turned out that the only family members who got it was my aunt's kids, the cousins I grew up with... I'm not making any blanket statements here, but in my family, it seems that Alzheimer's is genetic and passed on through the mother... My mother took care of grandmother till she died of Alzheimer's. There were stories that were funny and some that were heartbreaking... Mom knew how to take care of dad. Thankfully, he was blessed with a heart attack before it progressed too far... Thank you all for sharing your stories...