Brainstem labelingOnline version label by Waleed Ahmed 1 rostral 2 thalamus 3 pineal body 4 superior colliculus 5 brachium of superior colliculus 6 inferior colliculus 7 midbrain 8 lateral geniculate nucleus 9 medial geniculate nucleus 10 anterior medullary velum 11 superior cerebellar peduncle 12 middle cerebellar peduncle 13 inferior cerebellar peduncle 14 brachium of inferior colliculus 15 trochlear nerve (CN IV) 16 pons 17 Facial colliculus 18 obex 19 hypoglossal trigone 20 glossopharangeal nerve (CN IX) 21 Vagus nerve (CN X) 22 vagus trigone 23 medulla 24 spinal cord 25 spinal accessory nerve (CN XI) 26 caudal 27 dorsal (posterior) column tubercules: 28 nucleus cuneatus 29 nucleus gracilis 30 dorsal (posterior) columns: 31 fasciculus gracilis 32 fasciculus cuneatus