Exploration of the meninges and brain in situ

Close-up view of relation of internal cerebral veins to pineal body

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Image #4-1
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Exploration of the meninges and brain in situ
Close-up view of relation of internal cerebral veins to pineal body
The arachnoid has been removed from the pineal body and nearby vessels. In this specimen the pineal body is curved upward around the splenium of the corpus callosum and the internal cerebral veins life along its lateral borders. The great cerebral vein (of Galen), which is formed by the confluence of the internal cerebral veins along the upper surface of the pineal body is unusually short here. The subarachnoid space between the cerebellum and the cerebral veins is somewhat comma-shaped and is known as the cisterna venae magnae cerebri (cisterna ambiens).
1 . Corpus callosum (trunk)
2 . Medial longitudinal stria
3 . Inferior surface of right fornix
4 . Internal cerebral vein left
5 . Massa intermedia
6 . Interventricular foramen (of Monro)
7 . Free part of column of fornix
8 . Branch posterior cerebral artery (lateral central branch)
9 . Trochlear nerve (IV)
10 . Falx cerebri
11 . Great cerebral vein (of Galen)
12 . Straight sinus (opened)
13 . Branch of superior cerebellar artery and layer of arachnoid membrane which bounds the cisterna venae magnae cerebri laterally
14 . Pineal body
15 . Superior cerebellar vein
16 . Inferior colliculus
17 . Cerebellum