Alzheimer's disease is a common cause of dementia. Symptoms of Alzheimer's disease include memory loss, difficulty performing familiar tasks, disorientation to time and place, misplacing things, and more. The biggest risk factor for Alzheimer's disease is increased age. Treatment for Alzheimer's is often targeted toward decreasing the symptoms and progression of the disease. Alzheimer’s disease (AD) is a disorder that causes degeneration of the cells in the brain and it is the main cause of dementia, which is characterized by a decline in thinking and independence in personal daily activities. AD is considered a ... Alzheimer’s disease is a progressive condition that causes memory loss and cognitive decline. It accounts for 60% to 80% of dementia cases in the United States and most people with Alzheimer’s ... Find information about Alzheimer’s disease causes, signs and symptoms, diagnosis and treatment, and resources.