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Exploration of a brain cut in frontal section at the splenium of the corpus callosum

Anterior medullary velum, trochlear nerve, inferior and superior colliculi and pineal body

Image #21-5

KEYWORDS: Brain, Diencephalon, Medulla, Telencephalon, Vasculature.

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Higher resolution images are available for a fee. Contact Drew Bourn, PhD, MLIS.

Exploration of a brain cut in frontal section at the splenium of the corpus callosum

Anterior medullary velum, trochlear nerve, inferior and superior colliculi and pineal body

Branches of the superior cerebellar arteries have been cut away and only their main trunks have been left in the area of dissection. The great cerebral vein was removed to reveal its tributary internal cerebral veins and the underlying pineal body. The corpora quadrigemina are well exposed.

1 .	Cingulum (cut across)
2 .	External sagittal stratum (cut across)
3 .	Occipital part of radiations of corpus callosum
4 .	Cingulum (cut across)
5 .	Pineal body
6 .	Superior colliculus
7 .	Collateral fissure
8 .	Cerebellar lingula
9 .	Fusiform gyrus
10 .	Medial longitudinal fasciculus
11 .	Medial lemniscus
12 .	Cingulate gyrus
13 .	Choroid plexus lateral ventricle
14 .	Tapetum
15 .	Corpus callosum (splenium)
16 .	Internal cerebral vein left (not injected)
17 .	Calcarine fissure
18 .	Inferior colliculus
19 .	Trochlear nerve (IV)
20 .	Superior cerebellar artery (cut off)
21 .	Brachium conjunctivum (superior cerebellar peduncle) (cut across)
22 .	Facial colliculus
23 .	Brachium pontis (middle cerebellar peduncle) (cut across)
24 .	Pyramis of medulla oblongota