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Exploration of the meninges and brain in situ

Close-up view of diaphragma sellae and infundibulum

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Image #3-4
Diagram Image
Legend Image
Exploration of the meninges and brain in situ
Close-up view of diaphragma sellae and infundibulum
The optic chiasm and hypothalamus have been sectioned in the mid-sagittal plane. The arachnoid membrane has been cleared from the area in which the infundibulum (19) extends downward through the diaphragma sellae (20). Several subarachnoid cisterns are visible. The interpeduncular cistern lies posterior to (to the right of) the infundibulum, the chiasmatic cistern anterior to (to the left of) the infundibulum and the cistern of the lamina terminalis above the anterior cerebral artery (1).
  1. Anterior cerebral artery right
  2. Lamina terminalis
  3. Gyrus rectus
  4. Anterior communicating artery
  5. Right optic nerve (II)
  6. Optic chiasm
  7. Hypophysis
  8. Left optic nerve (II) (cut across)
  9. Internal carotid artery left
  10. Anterior clinoid process
  11. Anterior commissure
  12. Third ventricle
  13. Mamillary body
  14. Optic recess
  15. Infundibular recess
  16. Tuber cinereum
  17. Arteries within interpeduncular fossa (medial central branches of posterior cerebral artery)
  18. Dorsum sellae (covered with dura)
  19. Infundibulum
  20. Diaphragma sellae (sinus circularis visible close to free margin of diaphragm)
  21. Posterior cerebral artery left and cerebral peduncle
  22. Posterior communicating artery
  23. Oculomotor nerve (III)
  24. Posterior clinoid process
  25. Tentorium cerebelli