Bassett Collection of Stereoscopic Images of Human Anatomy

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

Colliculi, quadrigeminal brachia and geniculate bodies

Image #22-3

KEYWORDS: Brain, Diencephalon, Midbrain.

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

Colliculi, quadrigeminal brachia and geniculate bodies

The structures of the mesencephalon and diencephalon are now more exposed by the removal of the meninges and arterial branches. Note the cut ends of numerous small arteries as they enter the thalamus and geniculate bodies. The continuity of the superior colliculus with the superior quadrigeminal brachium is visible. The relations of the inferior colliculus, inferior quadrigeminal brachium and medial geniculate body are also visible. The pineal body has been cut away.

1 .	Corpus callosum
2 .	Base of pineal body (cut across)
3 .	Superior colliculus
4 .	Brachium of inferior colliculus
5 .	Cerebral peduncle (lateral margin)
6 .	Trochlear nerve (IV)
7 .	Fourth ventricle
8 .	External sagittal stratum (cut across)
9 .	Tapetum (exposed by removing ependyma of ventricle)
10 .	Caudate nucleus (tail) (covered with ependymal membrane)
11 .	Pulvinar
12 .	Choroidal artery (anterior)
13 .	Brachium of superior colliculus
14 .	Medial geniculate body
15 .	Lateral geniculate body
16 .	Hippocampus (cut across)
17 .	Hippocampal gyrus (cut across)
18 .	Fusiform gyrus (cut across)