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Reference Terms
from Wikipedia, the free encyclopedia

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Dementia

Dementia is progressive decline in cognitive function due to damage or disease in the brain beyond what might be expected from normal aging.

Particularly affected areas may be memory, attention, language and problem solving, although particularly in the later stages of the condition, affected persons may be disoriented in time (not knowing what day, week, month or year it is), place (not knowing where they are) and person (not knowing who they are).

Note:   The above text is excerpted from the Wikipedia article "Dementia", which has been released under the GNU Free Documentation License.
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