Stroke due to cerebral infarction. 3D magnetic resonance imaging (MRI) scan of a frontal view of a human brain following a stroke or cerebrovascular accident (CVA). This is a cerebral infarction due to a blockage or interruption of the blood supply, known as an ischaemic stroke. A stroke is where the brain is damaged due to hypoxia (lack of oxygen). This is usually due to an interruption or other damage to the blood supply. Here, the affected area is the right parietal lobe (upper left). Brain swelling and changes in the grey matter of the cerebral cortex are visible. White matter is in orange. The limbic system is in yellow and blue. The hippocampus is shown in green.