**Understanding Alzheimer's Disease (AD) **   Alzheimer's disease (AD) is a progressive brain disorder that gradually destroys memory and thinking skills, ultimately affecting the ability to perform simple tasks. Symptoms typically appear in later stages of life.   Dementia refers to a decline in cognitive function that is severe enough to interfere with daily life, while Alzheimer's disease is the most common cause of dementia. In essence, dementia is a syndrome, and Alzheimer's is a specific disease that triggers it.   Dementia impacts cognitive abilities such as thinking, remembering, and reasoning, and can range from mild impairment to severe dependence on others for daily activities.   Alzheimer's is characterized by the buildup of amyloid plaques and neurofibrillary tangles in the brain, which result in cell death and brain shrinkage. This overview provides information about Alzheimer's, including its symptoms, causes, and treatment options. =...