Figure 1: The areas of origin of the recurrent artery of Heubner. (a) The right recurrent artery of Heubner (RRAH) arose from A2; the left vessel (LRAH) originated at the junction of ACA-ACoA. (b) The right recurrent artery of Heubner (RRAH) originated from A1; the left vessel (LRAH) arose from A2. A1—precommunicating part of anterior cerebral artery (ACA); A2—postcommunicating part of ACA; ACoA—anterior communicating artery; IC—internal carotid artery; PCoA—posterior communicating artery; PCA—posterior cerebral artery; BA—basilar artery.