Dementia is a loss of thinking, remembering, and reasoning skills. It is not a normal part of aging. Read about the different types of dementia and how it is diagnosed.

Alzheimer’s disease is the mostly commonly diagnosed form of dementia in older adults. Learn more about the disease, including diagnosis and treatment, and find tips and resources for caregivers and people living with dementia.

What is Alzheimer’s disease, what causes it, what are the symptoms, and how is it treated? Get answers to these questions and more in this NIA fact sheet.

2024年8月27日 · Dementia—A term for a condition that significantly interferes with daily life because of impaired thinking and memory. Dementia with Lewy bodies—A type of Lewy body dementia that is a form of progressive dementia.

2025年3月5日 · Find toolkits on aging and dementia, including resources designed to be shared with family, community members, or patients to raise awareness and support.

2025年1月27日 · View an infographic on four different types of dementia, including what's happening in the brain and symptoms.

2025年3月11日 · NIA study reveals that nearly 42% of Americans over 55 may develop dementia, with new cases possibly doubling by 2060. Learn about the rising risk and future impact.

2022年11月19日 · Dementia describes an overall decline in memory and other cognitive skills severe enough to reduce a person's ability to perform everyday activities. The progressive and persistent deterioration of cognitive function characterizes it. Affected patients often have memory loss and a partial or significant lack of insight into their deficits.

2025年2月28日 · Lewy body dementia A brain disorder that can lead to problems with thinking, movement, behavior, mood, and other body functions. Vascular dementia A brain disorder that is caused by conditions such as stroke that disrupt blood flow to the brain and lead to problems with memory, thinking, and behavior. Learn more about dementia.

2024年8月5日 · Researchers have identified new genetic, behavioral, environmental, and lifestyle risk and protective factors for dementia; advanced research into behavioral and lifestyle interventions to reduce dementia risk; and developed improved diagnostic tools to help determine the cause of a person’s dementia symptoms.