Dissection of the head and neck, cervical spinal nerves, shown in situ. Head and neck divided in sagital section, brain removed leaving brainstem, spinal cord and spinal nerves. Vertebral bodies removed to show carotid arteries, nasopharynx and oropharnx also shown, tongue intact and dissected to show branches of the glossopharyngeal nerve (cranial nerve IX) and hypoglossal nerve (cranial nerve XII). Medial view.