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Stroke (apoplexy) is the destruction of brain tissue as a result of intracerebral haemorrhage, thrombosis (clotting), or embolism (obstruction in a blood vessel caused by clotting blood or foreign matter circulating in the blood stream).
Cerebral haemorrhage or thrombosis usually occurs in the elderly with constricted arteries.
Symptoms of stroke develop suddenly. In cases of severe brain damage, there may be deep coma, paralysis of one side of the body, and loss of speech, followed by death or by permanent neurological disturbances after recovery. If the brain damage sustained has been slight, there is usually complete recovery.
1. Black K, et al. Eicosapentaenoic acid: Effect on both brain prostaglandins, cerebral blood flow and edema in ischemic gerbils. Stroke 1984; 15(1):65-69.