Alzheimer's Disease (Alzheimer's)Gus Alva (Medical Director, ATP Clinical Research) gives expert video advice on: What is "Alzheimer's disease"?; How can I identify the first stage of Alzheimer's disease?; What happens to the brain of an Alzheimer's patient? and more... What is "Alzheimer's disease"? Alzheimer's disease happens to be the most common type of dementia. What are the symptoms of Alzheimer's disease? The most common symptom of Alzheimer's disease happens to be short-term memory loss. What are the stages of Alzheimer's disease? Alzheimer's goes through three diffferent main stages, mild, moderate, and severe. What happens to the brain of an Alzheimer's patient? The brain literally starts to atrophy, or shrink. What are "plaques" and "tangles"? Plaques and tangles are features that are characteristics of Alzheimer's disease. What do plaques and tangles do? As a result of the plaques and tangles, there's literally a choking off process that occurs with the tissue of the brain. Where does memory lie in the brain?