|
When blood flow to the brain is choked off, thinking and motor skills can diminish.
There are many causes of dementia. The most well-known is Alzheimer’s disease, in which brain cells are damaged by an accumulation of certain proteins in the brain. Vascular dementia, on the other hand, refers to a decline in thinking and motor skills caused by reduced blood flow to areas of the brain. The brain cells are then damaged by having less oxygen and fewer nutrients.
Damaged, shrunken or blocked blood vessels can all contribute to vascular dementia. Strokes are often a precursor to developing symptoms. Around 18 percent of people will develop dementia within a year of having a stroke, according to an analysis of 44 studies reported in the Journal of Neurology, Neurosurgery & Psychiatry. High blood pressure is an important risk factor, as it can damage blood vessels in the brain. Essentially, “the things that are risk factors for heart disease and stroke are also the risk factors for vascular dementia,” says Anthony Levinson, M.D., a medical psychiatrist and researcher at McMaster University in Hamilton, Ontario, Canada.
Other risk factors for vascular dementia include smoking, diabetes and high cholesterol.
|