1. Delirium is the most common disorder that may mimic dementia. Differentiation of delirium from dementia can be difficult because demented individuals are prone to developing a superimposed delirium.
2. Demented patients are alert, whereas, delirious patients have an altered level of consciousness.
3. Delirious patients demonstrate an acutely fluctuating clinical course, whereas demented patients display a stable, slowly progressive, downhill course.
B. Amnestic Disorder is characterized by isolated memory disturbance, without the cognitive deficits seen in dementia.
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