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

Comments:
: : Lecture 64 : : 1. The coronal suture and the sagittal suture meet at bregma. : : - true. Correct. : : 2. Arachnoid granulations reside within bony topographies called the granular foveolae. : : - true. Correct. : : 3. Separating the anterior cranial fossa from the middle cranial fossa is the anterior ridge of the chiasmatic groove. : : - true. Correct. : : 4. The tuberculum sellae extends anterior and superior to end at the posterior ridge of the chiasmatic groove. : : - true. Correct. : : 5. The posterior openings of the optic canals face into the middle cranial fossa. : : - true. Correct. : : 6. The superior petrosal ridge separated the middle cranial fossa from the posterior cranial fossa. : : - true. Correct. : : 7. The frontal and parietal emissary veins drain the region of the frontal air sinus and the scalp into the superior sagittal sinus. : : - true. Correct. : : 8. The inferior petrosal sinus drains from the cavernous sinus directly into the internal jugular vein. : : - true. Correct. : : 9. The mastoid emissary vein connects intracranial venous drainage with the external vertebral venous plexus. : : - true. Correct. : : 10. The most anterior extent of the superior sagittal sinus may connect to the nasal cavity by way of the foramen cecum. : : - true. Correct. : : 11. At the posterior extent of the tentorial notch is the meeting of the straight sinus with the inferior sagittal sinus. : : - true. Correct. : : 12. The superior petrosal sinus connects the cavernous sinus with the transverse sinus. : : - true. Correct. : : 13. The superior and inferior ophthalmic veins connect orbit with the cavernous sinus. : : - true. Correct. : : 14. An emissary vein through the cartilage of the lacerate foramen connects the cavernous sinus to the pterygoid venous plexus. : : - true. Correct. : : 15. The inferior petrosal sinus connects the cavernous to the basilar venous plexus and then to the internal anterior vertebral venous plexus. : : - true. Correct. : : 16. The sphenoparietal sinus connects the cavernous sinus to the region of the pterion. : : - true. Correct. : : 17. The anterior and posterior intercavernous sinuses connect one cavernous sinus to the other cavernous sinus. : : - true. Correct. : : 18. The occipital sinus connects the confluence of the sinuses with the internal posterior vertebral venous plexus. : : - true. Correct. : : 19. The marginal sinus surrounds the margin of the foramen magnum. : : - true. Correct. : : 20. The right transverse sinus tends to have a larger diameter than the left transverse sinus. : : - true. Correct. : : 21. The diaphragma sellae forms a dural shelf superior to the hypophyseal fossa and contains the intercavernous sinuses. : : - true. Correct. : : 22. The greater superficial petrosal nerve, but not the lesser superficial petrosal nerve, extends into the lacerate foramen. : : - true. Correct. : : 23. The facial, vestibulocochlear, glossopharyngeal, vagus, and hypoglossal nerves all leave the posterior cranial fossa to become extracranial. : : - true. Correct. : : - is VIII technically extracranial?? Yes. Within the temporal bone is not considered intracranial. Wall of the vault. : : 24. The cribriform plate of the ethmoid bone is located in the anterior cranial fossa. : : - true. Correct. : : 25. The clivus is part of the sphenoid bone. : : - false ⇒ occipital bone. Correct. : : 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. Correct. : : 27. The straight sinus drains directly into the confluence of sinuses. : : - true. Correct. : : 28. The basilar venous plexus is continuous with the internal posterior vertebral venous plexus. : : - false ⇒ internal anterior vertebral venous plexus. Correct. : : 29. The lacus lacrimalis is in the same region as the lacrimal puncta. : : - true. Correct. : : 30. The great vein of Galen combines with the inferior sagittal sinus to form the straight sinus. : : - true. Correct. : : 31. The emissary veins connect extracranial venous drainages with intracranial venous drainages. : : - true. Correct. : : 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. Correct. Not even nearly completely. All the routes for spread of infection. : : 33. The inferior sagittal sinus is within the inferior margin of the tentorium cerebelli : : - false ⇒ falx cerebri. Correct. : : 34. The foramen cecum, when patent, provides a venous communication between the superior sagittal sinus and the nasal cavity. : : - true. Correct. : : 35. The anterior free margin of the tentorium cerebelli forms the tentorial notch or incisura. : : - true. Correct. : : 36. The superior petrosal sinus passes superior to the trigeminal nerve. : : - true. Correct. : : 37. The repeating cascade of symptoms of cavernous sinus infection reflects, in part, spread of infection through the intercavernous sinus. : : - true. Correct. : : 38. The intercavernous sinus surrounds the pituitary stalk. : : - true. Correct. : : 39. The anterior lip of the chiasmatic groove defines, in part, the boundary between the middle and inferior cranial fossae. : : - false ⇒ anterior and middle. Correct. : : 40. The tuberculum sellae extends from the hypophyseal fossa to the posterior lip of the chiasmatic groove. : : - true. Correct. : : 41. The clivus extends from the foramen magnum to the inferior margin of the dorsum sellae. : : - true. Correct. : : 42. The lateral walls of the hypophyseal fossa are formed by the medial walls of the cavernous sinus. : : - true. Correct. : : 43. The occipital sinus is directly continuous with the anterior internal vertebral venous plexus. : : - false ⇒ posterior internal. Correct. : : 44. The basilar venous plexus directly connects with the anterior internal vertebral venous plexus. : : - true. Correct. : : 45. The superior orbital fissure marks the anterior boundary of the cavernous sinus. : : - true. Correct. : : 46. Structures that pass through the superior orbital fissure become a content of the cavernous sinus. : : - true. Correct.

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