About Dementia - some facts and figures

Overview

Introductory information for people interested in finding out about dementia, such as people with a diagnosis of dementia and their families, students, journalists and health care professionals.

Dementia is an umbrella term for a range of illnesses and disease symptoms, which primarily or secondarily affect the brain. Alzheimer’s disease and vascular dementia are the most frequently occurring illnesses.

In Alzheimer’s disease brain cells deteriorate through the build-up of a protein, vascular dementia is caused by problems in the supply of blood to brain cells. Many cases of dementia are caused by a mix of vascular damage and Alzheimer’s disease. Lewy body dementia is the next most frequently occurring illness, with fronto-temporal dementia then more commonly occurring in younger people.

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