New Research into Stroke and the Brain (broadcast Friday, June 27th, 2008)

The Arteries Beneath the Brain Gray's Anatomy, 20th Edition.

When a blood clot blocks an artery or blood flow to part of the brain is interrupted by a burst blood vessel, a person is said to have suffered a stroke. A stroke can cause the death of cells in the affected area of the brain, leading to brain damage. According to the National Stroke Association, stroke is the third leading cause of death in America and the leading cause of adult disability.

In this segment, we'll hear about two new medical studies dealing with strokes. Research published this week in the Archives of Internal Medicine finds that it may be possible to identify otherwise healthy older adults at risk for stroke and death by screening for subtle but clinically detectable neurological abnormalities, such as reduced reflexes and an unstable posture. We'll talk with one of the authors of the report. Plus, a report published this week in the journal Stroke found that about ten percent of a group of over 2000 apparently healthy study participants appear to have experienced a 'silent stroke,' or silent cerebral infarction. A 'silent stroke' has no outward symptoms, but can be seen via brain imaging techniques such as MRI. The study authors say the condition can be a risk factor for future strokes, or be an indication of progressive brain damage leading to long-term dementia. We'll find out more. Teachers, find more information about using Science Friday as a classroom resource in the Kids' Connection.