Dissection of the neck and head, deep dissection, shown in situ. Head divided in sagital section, neck dissected to show cranial nerves: glossopharyngeal nerve (cranial nerve IX), vagus nerve (cranial nerve X), accessory nerve (cranial nerve XI), and hypoglossal nerve (cranial nerve XII) shown. Optic nerve, eye, sympathetic chain and ganglia, cervical spinal nerve and brachial plexus, carotid artery, subclavian artery also shown. Lateral view.