Vascular Dementia and Alzheimer’s disease are two common types of dementia.  Some healthy older people encounter difficulty having recollection or carrying out certain mental activities.  But it doesn’t definitely mean they have dementia.  Dementia gets worse over time and can severely limit ability to function.

Dementia   click_for_detail

Dementia is not a specific disease.  It’s an overall term indicating a wide range of symptoms connected with a decline in memory or other thinking skills severe enough to reduce a person’s ability to perform daily activities.  Alzheimer’s disease 老年癡呆症 accounts for 60 to 80 percent of cases.  Vascular dementia,  occurring after a stroke, is the second most common type of dementia.  But there are many other conditions causing symptoms of dementia, including some that are reversible, such as vitamin deficiencies and thyroid problems 甲狀腺問題.

Alzheimer’s disease     click_for_detail

Dementia is frequently incorrectly related to as “senility” or “senile dementia,” which reflects the formerly widespread but incorrect belief that serious mental decline is a normal part of aging.

Dementia is a general term for a downturn in mental ability severe enough to interfere daily life, with memory loss as example.  Alzheimer’s is the most common type of dementia.


Symptoms of dementia can differ greatly, at least two of the following core mental functions must be significantly impaired to be considered dementia:

  •     Ability to focus and pay attention
  •     Communication and language
  •     Memory
  •     Reasoning and judgement
  •     Visual perception

People with dementia may suffer difficulty in short-term memory, such as locating of a purse or wallet, settling bills, arranging meals, forgetting appointments or traveling out of the neighborhood.

Many dementias are progressive with symptoms initiating slowly and gradually getting worse.   Professional evaluation may discover a treatable condition.  Even if symptoms suggest dementia, early diagnosis allows a person getting the maximum benefit from available treatments.  Additionally it provides time planning for the future.


Dementia is caused by the damage to brain cells.  Such damage interferes with the ability of brain cells to communicate among themselves.  When brain cells cannot communicate normally, behaviour, feelings and thinking can be obstructed.

The brain has many distinct regions, responsible for different functions (for example, judgement, memory and movement).  When cells in a particular region are damaged, that region cannot perform its functions correctly.

Different types of dementia are associated with particular types of brain cell damage in particular regions of the brain. For example, in Alzheimer’s disease, high levels of certain

While most changes in the brain causing dementia are permanent and worsen over time, memory and thinking problems caused by following conditions may be improved when the condition is treated:

    •     Depression 沮喪
    •     Medication side effects
    •     Excess use of alcohol
    •     Thyroid problems 甲狀腺問題
    •     Vitamin deficiencies



















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