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Exploration of the brain from its superior aspect

Stratum zonale thalami; fasciculus retroflexus; tapetum

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Image #11-6
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Exploration of the brain from its superior aspect
Stratum zonale thalami; fasciculus retroflexus; tapetum
Dissection of the left thalamus has been commenced by removing the lamina affixa. This exposes fibers in the stratum zonale which follow an arching course posteriorly approximately paralleling the course of the stria terminalis (which has now been removed). These fibers extend into the region below the lentiform nucleus and geniculocalcarine tract where they bend outward toward the temporal lobe (thalamotemporal tract).
1 . Lateral cerebral fissure
2 . Internal capsule
3 . Corona radiata
4 . Lentiform nucleus
5 . Inferior occipitofrontal fasciculus
6 . Fibers of stratum zonale thalami (see text)
7 . Retrolenticular part of internal capsule (cut across)
8 . Tapetum
9 . Collateral trigone
10 . Genu corpus callosum
11 . Fornix (column) (cut across)
12 . Interventricular foramen (opened from above)
13 . Anterior nucleus of thalamus
14 . Lamina affixa
15 . Stria medullaris thalami
16 . Medial nucleus of thalamus (dissected)
17 . Habenular nucleus and fasciculus retroflexus
18 . Superior colliculus
19 . Inferior colliculus