Exploration of the meninges and brain in situ

Relation of trochlear nerve to superior cerebellar artery and tentorium

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Image #3-3

Exploration of the meninges and brain in situ

Relation of trochlear nerve to superior cerebellar artery and tentorium

The tentorium cerebelli has been cut away to reveal the superior surface of the cerebellum and its vessels. The arachnoid remains intact.

1. Optic nerve (II) and anterior clinoid process (covered by dura)
2. Internal carotid artery
3. Diaphragma sellae
4. Posterior communicating artery
5. Oculomotor nerve (III)
6. Location of cavernous sinus (covered by dura)
7. Tentorium cerebelli (reflected)
8. Trochlear nerve (IV)
9. Trigeminal nerve (V) (beneath arachnoid membrane)
10. Superior cerebellar vein
11. Branch superior cerebellar artery
12. Anterior cerebral artery right
13. Anterior commissure
14. Optic chiasm (cut across in midline)
15. Infundibulum and triangular recess (upper pointer)
16. Infundibular recess
17. Mamillary body (cut across)
18. Cerebral peduncle
19. Third ventricle
20. Red nucleus
21. Arterial branch which entered brain stem through posterior perforated substance in interpeduncular fossa
22. Position of medial lemniscus
23. Brachium inferior quadrigeminal (cut across)
24. Superior colliculus
25. Internal cerebral vein left