Exploration of the cerebellum and brain stem from above and behind

Rhomboid fossa and its right lateral recess

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Image #24-6
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Exploration of the cerebellum and brain stem from above and behind
Rhomboid fossa and its right lateral recess
After more of the cerebellar hemisphere has been removed the flocculus and choroid plexus of the lateral recess can be seen extending down and lateral to the restiform body. The lateral recess of the ventricle has not been entirely opened, the thin tela chorioidea enclosing that part which extends alongside the flocculus. The small arteries ramifying upon the flocculus are derived from the posterior inferior and anterior inferior cerebellar arteries which anastomose in this area.
1 . Medullary center of superior semilunar lobe (crus I ansiform lobule)
2 . Medullary center of inferior semilunar lobe (crus II ansiform lobule)
3 . Dentate nucleus
4 . Brachium conjunctivum (superior cerebellar peduncle) (ventricular surface)
5 . Anterior medullary velum
6 . Fastigial nucleus
7 . Striae medullares (lying across restiform body (inferior cerebellar peduncle))
8 . Taenia fourth ventricle
9 . Median sulcus of rhomboid fossa
10 . Cervical part of medulla (cut across)
11 . Pedunculus flocculi
12 . Tela chorioidea and choroid plexus
13 . Flocculus