Brain haemorrhage. Coloured computed tomography (CT) scan of an axial section through the head showing a brain haemorrhage, a cause of a stroke. The yellow area is blood in the brain due to a ruptured blood vessel. Normal brain tissue is pink/purple. The area of brain tissue the ruptured vessel supplied will die as it is starved of oxygenated blood. Symptoms of a stroke (cerebrovascular accident) vary depending on which part of the brain is affected. Death or partial paralysis often result, although some may cause no more than a headache. Strokes are a major cause of death, and are usually due to high blood pressure.
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