Exploration of the brain from the medial aspect

Retrolenticular and sublenticular parts of internal capsule; striate arteries

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Image #18-4

Exploration of the brain from the medial aspect

Retrolenticular and sublenticular parts of internal capsule; striate arteries

The remainder of the lentiform nucleus has been taken out and the optic tract removed. The retrolenticular (12) and sublenticular (15) parts of the internal capsule are visible. The anterior perforated substance is cut away to reveal the course of the lateral striate arteries from the middle cerebral artery through the area of the lentiform nucleus. The medial inferior region of the frontal lobe is cut away.

1. Radiation corpus callosum (mostly removed)
2. Frontal part internal capsule
3. External capsule
4. Anterior commissure
5. Lateral striate arteries passing through anterior perforated substance
6. Middle cerebral artery (entering lateral fissure)
7. Anterior cerebral artery (cut off)
8. Superior longitudinal fasciculus
9. Fibers entering superior occipitofrontal fasciculus
10. Lateral ventricle
11. Fornix (crus) (cut across)
12. Retrolenticular part of internal capsule
13. Stria terminalis
14. Choroidal branch of posterior cerebral artery
15. Sublenticular part of internal capsule (geniculocalcarine tract) (cut across)
16. "Substantia innominata"
17. Basal vein
18. Choroidal artery (anterior) and uncus
19. Posterior communicating artery