X CLOSE

Exploration of the meninges and brain in situ

Brain stem and cranial nerves

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Image #3-6
Diagram Image
Legend Image
Exploration of the meninges and brain in situ
Brain stem and cranial nerves
The cerebellar peduncles (25, 26, 28) have been cut through and the left cerebellar hemisphere removed from the posterior cranial fossa. The tela chorioidea and choroid plexus (13) of the fourth ventricle were left in place. The ventricle is thus only partially opened. Choroid plexus covers the rootlets of the ninth and tenth nerves as they emerge from the medulla.
  1. Optic nerve (II) (cut across)
  2. Inferior cerebral vein
  3. Oculomotor nerve (III)
  4. Branches of cerebral artery posterior to brain stem (lateral central branches)
  5. Superior cerebellar artery (cut across)
  6. Trigeminal nerve (V)
  7. Cerebellar vein (petrosal vein)
  8. Superior petrosal sinus (opened)
  9. Facial nerve (VII) and vestibulocochlear nerve (VIII)
  10. Anterior inferior cerebellar artery (cut across)
  11. Transverse sinus (cut across)
  12. Glossopharyngeal nerve (IX), vagus nerve (X), and accessory nerve (Xl)
  13. Choroid plexus fourth ventricle
  14. Spinal root of accessory nerve (XI) lying against dura
  15. Roots hypoglossal nerve (XII)
  16. Verterbral artery left (ascending through cerebellomedullary cistern beneath medulla)
  17. Medulla oblongata
  18. Margin of foramen magnum (cut across)
  19. Vertebral artery passing medially across arch of atlas
  20. Mesencephalon (cut across)
  21. Superior cerebellar vein
  22. Inferior colliculus
  23. Trochlear nerve (IV)
  24. Cerebellar lingula
  25. Superior cerebellar peduncle (cut across below pointer)
  26. Brachium pontis (middle cerebellar peduncle) (cut across)
  27. Fourth ventricle
  28. Inferior cerebellar peduncle(cut across)
  29. Cerebellum (sagittal section)
  30. Straight sinus (opened)
  31. Fourth ventricle (visible through medial aperture fourth ventricle [foramen of Magendie])
  32. Posterior inferior cerebellar artery right
  33. Cerebellar tonsil
  34. Clava
  35. Occipital sinus
  36. Falx cerebelli
  37. Root of cervical nerve (II)