Bassett Collection of Stereoscopic Images of Human Anatomy

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Exploration of the brain from the medial aspect

Thalamo-cortical radiation to postcentral gyrus

Image #17-5

KEYWORDS: Brain, Diencephalon, Parietal lobe, Telencephalon, Temporal lobe.

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Exploration of the brain from the medial aspect

Thalamo-cortical radiation to postcentral gyrus

In an earlier dissection the medial lemniscus, one of the principal ascending somatic sensory tracts of the brain stem, was traced into the ventral posterior lateral nucleus of the thalamus. In the present view the continuation of this sensory system from the thalamus to the upper part of the postcentral gyrus (10) of the cerebral cortex can be visualized in part. Broken ends of fibers of this portion of the thalamic radiation (13) are visible projecting from the internal capsule in the region of the ventral posterior lateral nucleus.

1 .	Part of corona radiata
2 .	Area of fibers emerging from internal capsule to project toward pre- and postcentral gyri
3 .	Corpus callosum (remnant)
4 .	External medullary lamina (thalamus)
5 .	Anterior commissure (cut across)
6 .	Optic chiasm
7 .	Olfactory tract and bulb (displaced)
8 .	Precentral gyrus
9 .	Central sulcus
10 .	Postcentral gyrus.
11 .	Parieto-occipital fissure
12 .	Lingual gyrus
13 .	Area of posterior ventral lateral nucleus of thalamus and fibers projecting from it
14 .	Dorsal part of pons