A stroke is the restriction of blood flow in the brain that causes cell death. Strokes come in three types. When a clot forms in the brain, preventing oxygenated blood from reaching particular regions, it’s called an ischemic stroke. (Ischemia is the word used for restrictions of blood supply.) If the clot is only temporary, the resulting stroke is called a transient ischemic attack, or TIA. These are usually warning signs for subsequent strokes. When a weakened blood vessel in the brain bursts and causes internal bleeding, it’s called a hemorrhagic stroke. (A hemorrhage is the escape of blood
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