At the Level of Pons-Crus Cerebri Junction

1. Cerebral aqueduct
2. Periaqueductal gray
3. Dorsal tegmental nucleus
4. Trochlear nucleus
5. Trochlear nerve
6. Medial longitudinal fasciculus
7. Commissure of inferior colliculus
8. Inferior colliculus
9. Lateral lemniscus
10. Spinal lemniscus
11. Medial lemniscus

12. Central tegmental tract
13. Tectospinal tract
14. Superior cerebellar peduncle
15. Decussation of superior cerebellar peduncle
16. Interpeduncular nucleus
17. Interpeduncular fossa
18. Substantia nigra
19. Parietotemporooccipitopontine tracts
20. Corticospinal and corticobulbar tracts
21. Crus cerebri
22. Basal pons

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