Exploration of the brain from its lateral aspect

Interventricular foramen, column of fornix and mammillothalamic tract

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Image #15-4

Exploration of the brain from its lateral aspect

Interventricular foramen, column of fornix and mammillothalamic tract

The thalamus and internal capsule have been cut away to expose structures in the vicinity of the interventricular foramen (3). The choroid plexus seen in the central part of the lateral ventricle continues through the interventricular foramen into the roof of the third ventricle.

1. Radiation of corpus callosum (cut across)
2. Anterior horn lateral ventricle
3. Interventricular foramen (of Monro)
4. Fornix (column)
5. Radiation of rostral lamina of corpus callosum beneath the head of the caudate nucleus
6. Posterior part of anterior commissure
7. Inner aspect of area parolfactoria
8. Optic tract (cut across)
9. Limen insulae (cut across lateral to anterior perforated substance)
10. Middle cerebral artery
11. Amygdaloid nucleus (cut through)
12. Central part lateral ventricle
13. Choroid plexus lateral ventricle
14. Mamillothalamic tract entering anterior nucleus of thalamus
15. Stria medullaris thalami
16. Thalamus (cut across)
17. Periventricular fibers
18. Fimbria of hippocampus
19. Internal capsule (cut across)
20. Hippocampus
21. Choroidal branch of posterior cerebral artery
22. Choroidal artery (anterior)
23. Anterior boundary of inferior horn lateral ventricle