Difference between Dementia, Delirium and Alzheimer's

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Delirium refers to confusion or acute confusional state of mind. It can be caused by physical illness or mental illness .delirium is most common in elderly patients. Basically delirium is condition which results in confusion, also includes changes in behavior, thinking, attention and mood.
Difference between delirium, dementia and Alzheimer’s disorder:
People suffering from dementia are highly susceptible to delirium but dementia should not be confused with delirium.
In dementia changes in memory occurs very slowly like in months and years.
Whereas delirium is more referred to confusion emerging over days and weeks.

ONSET Within a short time Worsen gradually overtime
ATTENTION Inability to maintain attention Remain generally alert at early stages
FLUCTUATION Symptoms fluctuate throughout the day Memory and thinking remain constant throughout the day
CONCIOUSNESS reduced clear
SPEECH Slow or rapid Difficulty in finding words INVOLUNTARY MOVEMENTS Often tremors Absent

Delirium is also different from Alzheimer’s disease that in delirium confusion fluctuates over the day dramatically. Thinking and conversation can be disorganized at any time, in delirium patient may become hyper alert or drowsiness state can be occurred.
Clinically delirium can be classified as:
Occurrence: 30%
Patients are hyperactive and hyper alert with repetitive behaviors, wandering, hallucinations and

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