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Exploration of the meninges and brain in situ

Optic nerve, optic chiasm, optic tract and lateral geniculate body viewed from above and in front

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Image #2-7
Diagram Image
Legend Image
Exploration of the meninges and brain in situ
Optic nerve, optic chiasm, optic tract and lateral geniculate body viewed from above and in front
The thalamus (2, 4) and internal capsule (20) have been cut away so that the optic tract (21) can be followed posteriorly from the optic chiasm to its termination at the lateral geniculate body (17). The left internal carotid artery (25) is visible within the chiasmatic subarachnoid cistern. A short distance above its point of emergence from beneath the anterior clinoid process the carotid bifurcates (22, lower pointer) into the anterior and middle cerebral arteries.
  1. Striatum zone of thalamus
  2. Lateral nucleus of thalamus
  3. Internal cerebral vein
  4. Medial nucleus of thalamus
  5. Massa intermedia (cut through)
  6. Hypothalamus (cut across)
  7. Septum pellucidum
  8. Third ventricle (pointer on right hypothalamus)
  9. Hypothalamus (cut through)
  10. Anterior commissure (cut across)
  11. Lamina terminalis
  12. Corpus callosum
  13. Anterior communicating artery
  14. Optic nerve (11)
  15. Superior frontal gyrus (on medial surface of right hemisphere)
  16. Choroid plexus lateral ventricle and choroidal branch of posterior cerebral artery
  17. Lateral geniculate body (cut across)
  18. Hippocampus
  19. Medullary substance of temporal lobe
  20. Internal capsule (near the point at which it is continuous with the cerebral peduncle)
  21. Optic tract
  22. Medial margin of tentorium cerebelli and bifurcation of internal carotid artery into anterior and middle cerebral arteries (lower pointer)
  23. Middle cranial fossa
  24. Optic chiasm
  25. Internal carotid artery
  26. Recurrent branch of anterior cerebral artery (artery of Heubner)
  27. Inferior cerebral vein
  28. Olfactory tract (cut across)