Right posterior lateral view into the posterior cranial fossa. The cerebellum has been retracted to show emerging fibers of the glossopharyngeal, vagus, spinal accessory (approaching the jugular foramen), and hypoglossal nerves (shown traversing the hypoglossal canal, which has been opened) from the medulla. The extra-and intracranial course of the vertebral artery is also seen. (Image courtesy of AL Rhoton, Jr.)