DR. E. WALKER / SCIENCE PHOTO LIBRARY DR. E. WALKER / SCIENCE PHOTO LIBRARY
Cerebral infarction. Section through a human brain showing cerebral infarction (tissue death) caused by a severe reduction in blood pressure. The areas of dead brain tissue are seen as discolorations at upper right & upper left. Cerebral infarction is caused by an obstruction in a cerebral artery with resulting interruption in the blood supply. Arterial blockage may be due to thrombosis (blood clot) or embolism (a fragment or air bubble in the blood). The infarction may also be due to haemorrhage from a weakened arterial wall. The affected area is starved of oxygen with consequent tissue death. The result is a nervous disturbance called a stroke or cerebrovascular accident.
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