Exploration of the brain from its basal aspect

External capsule, lentiform nucleus and deeper course of striate arteries

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Image #5-5

Exploration of the brain from its basal aspect

External capsule, lentiform nucleus and deeper course of striate arteries

The main trunk of the middle cerebral artery has been retracted far laterally, the medullary center of the insula removed and the claustrum scraped away. The external capsule has been partially removed, the remaining portion being turned laterally to expose the lentiform nucleus. The course of the lateral striate arteries into the lentiform nucleus is visible.

1. Orbital gyrus
2. Middle cerebral artery (divided and turned laterally)
3. Superior longitudinal fasciculus
4. Frontal part of operculum
5. External capsule (reflected laterally)
6. Lentiform nucleus (putamen)
7. Lateral striate artery
8. Amygdaloid nucleus (partially removed)
9. Stria terminalis
10. Geniculocalcarine tract (cut across close to its origin from lateral geniculate body)
11. Inferior occipitofrontal fasciculus
12. Longitudinal fissure (cerebral)
13. Olfactory trigone
14. Recurrent branch of anterior cerebral artery
15. Anterior perforated substance
16. Tuber cinereum
17. Choroidal artery (anterior)
18. Interpeduncular fossa
19. Posterior cerebral artery (divided)
20. Hippocampus (cut across)