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 to signs well. Not a good feeling for a while... It turned out that the only family who got it was my aunt's kids, my 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 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....