Is a trident or a bident? Appearance of a primitive trigeminal artery on sagittal views

Abstract

Fig. 2. A) Lateral digitally subtracted catheter angiogram of a selected internal carotid artery (arrow) injection demonstrating the persistent trigeminal artery (arrowhead) passing posteriorly to join the basilar artery (open arrow). B) Cropped view of the painting ''Concilio degli dei" by Raffaello Sanzio da Urbino depicting Hades holding a bident (left), next to his brother Poseidon holding a trident (middle) [10]. Zeus (right) is also pictured, without a spear.