The Various Forms of Dementia


Vascular Dementias

This is the name given to dementia caused by poor circulation of blood in the brain. There are a number of different types of vascular dementia, the most common being multi-infarct dementia, where the small blood vessels in the brain becoming narrowed or blocked. The cells in the brain supplied by these blood vessels become starved of the blood and oxygen they need, and become damaged or die. This is like having a series of small strokes in the brain.

Other less common types of dementia include

  • Lewy body dementia
  • Dementia caused by Picks disease
  • Dementia caused by Huntington's disease
  • Dementia caused by Creutzfeld-Jakob disease (CJD)
  • Dementia caused by the advanced stages of syphilis or HIV/AIDS
  • Dementia caused by hypothyroidism (under-activity of the thyroid gland)
  • Dementia caused by build-up of fluid within the skull leading to pressure on the brain
  • Dementia caused by infections of the brain, such as meningitis or encephalitis
  • Dementia as part of a neurological (brain) illness, such as Parkinson's disease or multiple
  • Dementia caused by reaction to a medication, or to an interaction of two or more
  • Dementia caused by long-term alcohol misuse
  • Dementia caused by use of illegal drugs
  • Dementia caused by lack of certain hormones or nutrients, especially B vitamins.