Fig. 2.

Photograph and Schematic of posterior inferior cerebellar artery penetrating spinal accessory nerve rootlets (A and B) and of posterior inferior cerebellar artery passing between glossopharyngeal and vagus nerves (C and D) (Saylam et al. 2007). B medulla oblongata (bulbous), BA basilar artery, C cerebellum, O olive, P posterior inferior cerebellar artery, VA vertebral artery, VII facial nerve, VIII vestibulocochlear nerve, IX glossopharyngeal nerve, X vagus nerve, XI spinal accessory nerve, Arrow anterior inferior cerebellar artery, Arrowheads rootlets of hypoglossal nerve