What is Alzheimer's disease? Alzheimer's is a slow fatal disease of the brain affecting one in 10 people over the age of 65. No one is immune. The disease comes on gradually as abnormal protein fragments called plaques and tangles accumulate in the brain and kill brain cells. They start here in the hippocampus the part of the brain where memories are the first to form. Over many years' time, the plaques and tangles slowly destroy the hippocampus and it becomes harder and harder to form new memories. Simple recollections from a few hours or days ago but the rest of us might take for granted are just not there. After that more plaques and tangles spread into different regions of the brain. Ellen cells and compromising function wherever they go this is spreading around is what causes the different stages of Alzheimer's. From the hippocampus, the disease spreads here to the region of the brain where the language is processed when that happens it gets tougher and