A stroke occurs when blood flow to part of the brain is interrupted, depriving brain cells of oxygen. Areas of the brain responsible for speech, comprehension, and thinking are particularly sensitive to changes in blood supply.

In some cases, people experience a transient ischemic attack (TIA), often called a “mini-stroke.” Symptoms of a TIA—such as confusion or speech difficulty—may disappear quickly, sometimes within minutes or hours. While this can feel reassuring, a TIA is a serious warning that a full stroke may follow.

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