Floor of cranial cavity

Structures inferior to anterior and middle cranial fossae

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Image #50-4

Floor of cranial cavity

Structures inferior to anterior and middle cranial fossae

Bone has been removed to expose structures underlying the floor of the anterior part of the cranial vault.

1. Mucosa of frontal sinus
2. Orbital part of frontal bone
3. Position of anterior ethmoidal foramen (opened)
4. Olfactory bulb
5. Periorbita
6. Mucosa of ethmoidal cell (posterior)
7. Position of maxillary sinus (in depths of view)
8. Maxillary nerve (V)
9. Oculomotor nerve (III)
10. Part of pterygoid venous plexus
11. Deep temporal nerve posterior
12. Ophthalmic nerve (VI)
13. External pterygoid muscle
14. Abducens nerve (VI)
15. Crista galli
16. Mucosa of sphenoid sinus
17. Middle cranial fossa
18. Optic nerves (II)
19. Internal carotid artery (right and left)
20. Hypophysis (left half cut away)
21. Sella turcica
22. Dorsum sellae