Professional Ski Instructors Of America (PSIA) Level 3 Practice Exam

What best defines a cerebrovascular accident (CVA), also known as a stroke?

Sudden impairment of brain circulation in one or more blood vessels causing brain damage. A genetic disorder causing progressive muscle weakness. A temporary mood disturbance due to dehydration. A chronic degenerative joint disease.

Correct Answer:

Sudden impairment of brain circulation in one or more blood vessels causing brain damage.

Explanation:

The key idea is that a stroke is a sudden disruption of blood flow to part of the brain, causing brain tissue damage. When an artery is blocked or a blood vessel bleeds, brain cells are deprived of oxygen and nutrients and begin to die within minutes, leading to the neurological deficits seen after a cerebrovascular accident. That’s why the best description is a sudden impairment of brain circulation in one or more vessels resulting in brain damage. The other options describe conditions that are not acute brain injuries: a genetic neuromuscular disorder would involve the muscles, dehydration-related mood changes aren’t a brain injury, and chronic degenerative joint disease affects joints, not brain tissue.

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