

MEDULLA OBLONGATA. 



469 



FIG. 211. ANTERIOR OR VENTRAL 

 VIEW or THE MEDULLA OB- 

 LONGATA AND ISTHMUS, i. In- 

 fundibulum. 2. Tuber ciner- 

 eum. 3. Corpora albicantia. 4. 

 Cerebral peduncle. 5. Tuber 

 annulare. 6. Origin of the mid- 

 dle peduncle of the cerebellum. 

 7. Anterior pyramids of the 

 medulla oblongata. 8. Decussa- 

 tion of the anterior pyramids. 9. 

 Olivary bodies. 10. Restiform 

 bodies, n. Arciform fibers. 12. 

 Upper extremity of the spinal 

 cord. 13. Ligamentum denticu- 

 latum. 14, 14. Dura mater of 

 the cord. 15. Optic tracts. 16. 

 Chiasm of the optic nerves. 17. 

 Motor oculi communis. 18. 

 Patheticus. 19. Fifth nerve. 20. 

 Motor oculi externus. 21. Facial 

 nerve. 22. Auditory nerve. 23. 

 Nerve of Wrisberg. 24. Glosso- 

 pharyngeal nerve. 25. Pneumo- 

 gastric. 26, 26. Spinal accessory. 

 27. Sublingual nerve. 28, 29, 30. 

 Cervical nerves. (Sappey.*) 



FIG. 212. POSTERIOR OR DORSAL VIEW OF 

 THE MEDULLA OBLONGATA, ISTHMUS, 

 AND BASAL GANGLIA. i. Corpora 

 quadrigemina. 2. Corpus quadrige- 

 minum anterior (pregeminum). 3. Cor- 

 pus quadrigeminum posterior (post- 

 geminum). 4. Tract of fibers (bra- 

 chium) passing to the corpus genicula- 

 tum externum. 5. Tract of fibers 

 (brachium) passing to 6, the corpus 

 geniculatum internum. 7. Posterior 

 commissure. 8. Pineal gland. 9. Su- 

 perior cerebellar peduncle. 10, n, 12. 

 The valve of Vieussens. 13. The pa- 

 thetic nerve. 14. Lateral groove of the 

 isthmus. 15. Triangular bundle of the 

 isthmus. 1 6. Superior cerebellar pedun- 

 cle. 17. Middle cerebellar peduncle. 

 18. Inferior cerebellar peduncle. 19. 

 Antero-inferior wall of the fourth ven- 

 tricle. 20. Acoustic nerve. 21. Spinal 

 cord. 22. The postero-median column. 

 23. The posterior pyramids. (Sappey.) 



