Differentiate between acute and chronic dementia?

Identify four causes for each type of dementia

acute means the onset eg: early stage, chronic is the latter and therefore more severe stage of dementia.
Alzheimer's is usually caused by a general loss of brain cells and tissue shrinkage in the brain,
Vascular dementia is caused by a lack of oxygen in the blood flow to the brain and the most common cause of this is a stroke,
DLB (dementia with lewy bodies) the lewy body is a tiny spherical abnormality found in the brain and is thought to contribute to the death of brain cells,
Fronto-temporal dementia is a rare form including Pick's disease and this causes damage to the frontal lobe or the temporal parts

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