Exploration of the left half of the cerebellum and brain stem from its inferior and medial aspect

Lateral recess of fourth ventricle

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Image #25-7

Exploration of the left half of the cerebellum and brain stem from its inferior and medial aspect

Lateral recess of fourth ventricle

The medulla has been removed by a transverse cut made near its junction with the pons. The tela chorioidea of the lateral recess has been incised and the edges turned back to expose the entire extent of this part of the fourth ventricle.

1. Medullary substance of the declive,folium and tuber of vermis
2. Pyramid (vermis)
3. Uvula vermis
4. Fastigium
5. Nodulus
6. Tonsil (ventral paraflocculus)
7. Striae medullares passing into lateral recess of rhomboid fossa
8. Lateral recess of rhomboid fossa
9. Posterior inferior cerebellar artery
10. Position of lateral aperture fourth ventricle
11. Glossopharyngeal nerve (IX)
12. Primary fissure
13. Culmen
14. Central lobule
15. Lingula
16. Cerebral aqueduct and anterior medullary velum
17. Superior fovea rhomboid fossa
18. Facial colliculus
19. Restiform body (inferior cerebellar peduncle) and spinal trigeminal tract
20. Decussation of superior cerebellar peduncle
21. Inferior olivary nucleus and medial lemniscus
22. Pyramid and pons