Terminology: Dementia is a general term indicative of cognitive deterioration secondary to a variety of causes. Alzheimer's disease is the most common cause of dementia in the elderly. However, it is important to sort out the different causes, as some are treatable and reversible, such as vitamin deficiencies, small strokes, medication adverse effects, etc.
Answered 1/13/2019
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Dementia is general: Alzheimers disease is the most common type of dementia.
Answered 2/9/2020
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Dementia: Alzheimer's is one type of dementia. There are many other types of dementia.
Answered 9/28/2016
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