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Re: Lecture 64: Interior of Skull, Bony Cranial Fossa, Dural Sinuses - True False

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Posted by Alexis on December 09, 2021 at 13:15:45:

In Reply to: Lecture 64: Interior of Skull, Bony Cranial Fossa, Dural Sinuses - True False posted by lae2 on December 05, 2021 at 14:35:34:

Lecture 64
1. The coronal suture and the sagittal suture meet at bregma.

- true

2. Arachnoid granulations reside within bony topographies called the granular foveolae.

- true

3. Separating the anterior cranial fossa from the middle cranial fossa is the anterior ridge of the chiasmatic groove.

- true

4. The tuberculum sellae extends anterior and superior to end at the posterior ridge of the chiasmatic groove.

- true

5. The posterior openings of the optic canals face into the middle cranial fossa.

- true

6. The superior petrosal ridge separated the middle cranial fossa from the posterior cranial fossa.

- true

7. The frontal and parietal emissary veins drain the region of the frontal air sinus and the scalp into the superior sagittal sinus.

- true

8. The inferior petrosal sinus drains from the cavernous sinus directly into the internal jugular vein.

- true

9. The mastoid emissary vein connects intracranial venous drainage with the external vertebral venous plexus.

- true

10. The most anterior extent of the superior sagittal sinus may connect to the nasal cavity by way of the foramen cecum.

- true

11. At the posterior extent of the tentorial notch is the meeting of the straight sinus with the inferior sagittal sinus.

- true

12. The superior petrosal sinus connects the cavernous sinus with the transverse sinus.

- true

13. The superior and inferior ophthalmic veins connect orbit with the cavernous sinus.

- true

14. An emissary vein through the cartilage of the lacerate foramen connects the cavernous sinus to the pterygoid venous plexus.

- true

15. The inferior petrosal sinus connects the cavernous to the basilar venous plexus and then to the internal anterior vertebral venous plexus.

- true

16. The sphenoparietal sinus connects the cavernous sinus to the region of the pterion.

- true

17. The anterior and posterior intercavernous sinuses connect one cavernous sinus to the other cavernous sinus.

- true

18. The occipital sinus connects the confluence of the sinuses with the internal posterior vertebral venous plexus.

- true

19. The marginal sinus surrounds the margin of the foramen magnum.

- true

20. The right transverse sinus tends to have a larger diameter than the left transverse sinus.

- true

21. The diaphragma sellae forms a dural shelf superior to the hypophyseal fossa and contains the intercavernous sinuses.

- true

22. The greater superficial petrosal nerve, but not the lesser superficial petrosal nerve, extends into the lacerate foramen.

- true

23. The facial, vestibulocochlear, glossopharyngeal, vagus, and hypoglossal nerves all leave the posterior cranial fossa to become extracranial.

- true
- is VIII technically extracranial??

24. The cribriform plate of the ethmoid bone is located in the anterior cranial fossa.

- true

25. The clivus is part of the sphenoid bone.

- false ⇒ occipital bone

26. The cavernous sinus has immediate drainages into the superior petrosal sinus, inferior petrosal sinus, basilar venous plexus, sphenoparietal sinus, ophthalmic vein, pterygoid venous plexus, and the intercavernous sinus.

- true

27. The straight sinus drains directly into the confluence of sinuses.

- true

28. The basilar venous plexus is continuous with the internal posterior vertebral venous plexus.

- false ⇒ internal anterior vertebral venous plexus

29. The lacus lacrimalis is in the same region as the lacrimal puncta.

- true

30. The great vein of Galen combines with the inferior sagittal sinus to form the straight sinus.

- true

31. The emissary veins connect extracranial venous drainages with intracranial venous drainages.

- true

32. Ligation of the internal jugular veins at the base of the skull does not block intracranial venous drainage.

- false ⇒ it would block it but not completely

33. The inferior sagittal sinus is within the inferior margin of the tentorium cerebelli

- false ⇒ falx cerebri

34. The foramen cecum, when patent, provides a venous communication between the superior sagittal sinus and the nasal cavity.

- true

35. The anterior free margin of the tentorium cerebelli forms the tentorial notch or incisura.

- true

36. The superior petrosal sinus passes superior to the trigeminal nerve.

- true

37. The repeating cascade of symptoms of cavernous sinus infection reflects, in part, spread of infection through the intercavernous sinus.

- true

38. The intercavernous sinus surrounds the pituitary stalk.

- true

39. The anterior lip of the chiasmatic groove defines, in part, the boundary between the middle and inferior cranial fossae.

- false ⇒ anterior and middle

40. The tuberculum sellae extends from the hypophyseal fossa to the posterior lip of the chiasmatic groove.

- true

41. The clivus extends from the foramen magnum to the inferior margin of the dorsum sellae.

- true

42. The lateral walls of the hypophyseal fossa are formed by the medial walls of the cavernous sinus.

- true

43. The occipital sinus is directly continuous with the anterior internal vertebral venous plexus.

- false ⇒ posterior internal

44. The basilar venous plexus directly connects with the anterior internal vertebral venous plexus.

- true

45. The superior orbital fissure marks the anterior boundary of the cavernous sinus.

- true

46. Structures that pass through the superior orbital fissure become a content of the cavernous sinus.

- true


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