Narrator: This is Science Today. Alzheimer’s Disease is the most common form of dementia in old age, comprising well over half of all dementing illnesses. But Calvin Hirsch, a professor of epidemiology at the University of California, Davis says there are other types of dementia.
Hirsch: Some called schemic vascular dementia, which is a result, presumably of small strokes affecting the brain and dementia can cause from a variety of more obscure diseases, as well as from the effects of too many years of heavy drinking. There are multiple causes.
Narrator: But what’s becoming more apparent, Hirsch says, is the fact that many of these dementing illnesses are inter-related.
Hirsch: For example, people with schemic vascular dementia, dementia from multiple, small strokes have a higher than expected prevalence of the pathological changes that are seen in Alzheimer Disease.
Narrator: Hirsch says this means an insufficient amount of blood flow to the brain because of atherosclerosis may be one of the factors predisposing one toward’s Alzheimer’s disease. For Science Today, I’m Larissa Branin.