The accessory middle cerebral artery: Report of further two cases

The accessory middle cerebral artery may be found in about three per cent of brains at autopsy. It is rarely demonstrated by carotid angiography. The authors present two further angiographic demonstrations of this anomaly. They suggest that it is the artery of Heubner (lateral perforator of the anterior cerebral artery) that for some reason has become hypertrophied during development.