Alzheimer's Disease

Frequently Asked Questions

2. What is dementia?

Dementia is a loss of thinking, remembering, and reasoning skills that interferes with a person's daily life and activities. Alzheimer's disease is the most common cause of dementia among older people. Other causes of dementia include blood-vessel disease in the brain (called vascular dementia), Parkinson's disease, frontotemporal dementia, and Lewy body disease.