Medical Definition of stroke
: sudden impairment or loss of consciousness, sensation, and voluntary motion that is caused by rupture or obstruction (as by a clot) of a blood vessel supplying the brain and is accompanied by permanent damage of brain tissue ◆Symptoms of stroke include numbness or weakness on one side of the body or face, confusion, impaired speech or vision, loss of coordination or balance, trouble walking, or severe headache. The most common type of stroke, ischemic stroke, results from a narrowed or blocked blood vessel, while hemorrhagic stroke results from a ruptured blood vessel. A very brief interruption of blood supply to the brain usually without lasting effects is called a ministroke or a transient ischemic attack. <… people at risk for stroke should be evaluated for surgery to open up blockages in the arteries of the neck.—Jay Siwek, The Washington Post, 22 June 1999> <Partial paralysis and speech difficulties often follow these strokes.—Bruce Bower, Science News, 25 Feb. 1984> <stroke survivors>—called also apoplexy, brain attack, cerebral accident, cerebrovascular accident
Learn More about stroke
Seen and Heard
What made you want to look up stroke? Please tell us where you read or heard it (including the quote, if possible).