13 Different kinds of dementia – symptoms and prognosis brain anoxia

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Dementia is an umbrella term that covers many types of cognitive impairment. Symptoms of dementia generally include memory loss, poor judgment, communication difficulties, and personality changes.

Often, early symptoms are especially helpful in distinguishing the different types of dementia from each other.

The most common cause of dementia is alzheimer’s disease.

Alzheimer’s disease

Initial symptoms: early symptoms include short-term memory loss, poor judgment, and difficulty finding the right words.

Progression: alzheimer’s usually progresses from the early stages to the middle stages in 2-4 years.


In the middle stages, cognition continues to decline and behavioral and psychological symptoms of dementia sometimes develop, making it a particularly challenging for the person with dementia and his caregiver.Brain anoxia

Prognosis: average life expectancy is alzheimer’s disease ranges from 8 to 10 years after diagnosis, although some people live up to 20 years.

• read more: all about alzheimer’s disease: early, middle and late symptoms

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Early symptoms: initial symptoms often include word-finding difficulty, memory loss, challenges in executive functioning and slow processing speed. These symptoms may be related to a transient ischemic event, a stroke or unnoticed small vessel disease (which includes changes in the brain such as white matter lesions and narrowing of the arteries).

Progression: vascular dementia typically has a step-like progression, as opposed to a gradual decline more typical of alzheimer’s.Brain anoxia this means that functioning in vascular dementia may remain stable for quite some time after the initial symptoms until a noticeable decline occurs, and then remain at that next level for an extended period again until the next decline develops.

Prognosis: prognosis in vascular dementia varies greatly and is related to how much damage there is in the brain and other occurrences of strokes or tias.

• related reading: what’s the difference between alzheimer’s and vascular dementia?

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Initial symptoms: parkinson’s disease dementia is one type of lewy body dementia. (the other is called dementia with lewy bodies.) both involve body changes (such as slow movements, weakness, and rigidity) and brain changes (such as memory loss, a decrease in attention and poor executive functioning.)

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In parkinson’s disease dementia, the motor and mobility symptoms are present for at least one year before the cognitive changes develop.

Progression: parkinson’s disease dementia usually has a gradual progression over time. Hallucinations often become common and confusion is likely to increase. Falls may also become more frequent and overall physical functioning declines.

Prognosis: average life expectancy varies significantly depending on the health of the person and the age at which parkinson’s developed.

• suggested for you: 10 things to know about parkinson’s disease dementia

• and this: dementia with lewy bodies and lewy body dementia: same or different?

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Initial symptoms: symptoms of mixed dementia often appear similar to those of early alzheimer’s disease and include difficulty learning new information, memory loss (typically short-term memory impairment), confusion as to the day or time and word-finding difficulties.Brain anoxia

Mixed dementia is often misdiagnosed as a single type of dementia and then discovered either through imaging such as mris or in an autopsy after death.

Mixed dementia is often caused by the combination of alzheimer’s, vascular dementia and/or lewy body dementia.

• read more: more than simple memory loss: 10 early warning signs of alzheimer’s

Progression: as mixed dementia progresses, brain functioning declines further, causing difficulty in physical abilities such as activities of daily living as well, as all areas of cognition.

Prognosis: life expectancy after diagnosis of mixed dementia is not clearly established because diagnosis is sporadic. However, researchers estimate that prognosis may be shorter for mixed dementia than for a single cause of dementia such as alzheimer’s since additional factors are affecting brain functioning.Brain anoxia

• suggested for you: all about mixed dementia