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).
Corpus callosum (trunk)
Medial longitudinal stria
Inferior surface of right fornix
Internal cerebral vein left
Massa intermedia
Interventricular foramen (of Monro)
Free part of column of fornix
Branch posterior cerebral artery (lateral central branch)
Trochlear nerve (IV)
Falx cerebri
Great cerebral vein (of Galen)
Straight sinus (opened)
Branch of superior cerebellar artery and layer of arachnoid membrane which bounds the cisterna venae magnae cerebri laterally