Re: Cranial Fossa and Cavernous Sinus

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: : Cranial Fossa and Cavernous Sinus: Learning Objectives and Review Questions : : Show the table of contents... : : True/False : : True False 2011 : : 1. The coronal suture and the sagittal suture meet at bregma. : T : : 2. Arachnoid granulations reside within bony topographies called the granular fovealae. : T : : 3. Separating the anterior cranial fossa from the middle cranial fossa is the anterior ridge of the chiasmatic groove. : T - prechiasmatic groove according to Netter : : 4. The tuberculum sellea extends anterior and superior to end a the posterior ridge of the chiasmatic groove. : F - medial/lateral : : 5. The posterior openings of the optic canals face into the middle cranial fossa. : T : : 6. The superior petrosal ridge separated the middle cranial fossa from the posterior cranial fossa. : T : : 7. The frontal and parietal emissary veins drain the region of the frontal air sinus and the scalp into the superior sagittal sinus. : T : : 8. The inferior petrosal sinus drains from the cavernous sinus directly into the internal jugular vein. : Class notes say true, other sources say it hits the sigmoid sinus first. AJNR says directly to jugular in most cases. : : 9. The mastoid emissary vein connects intracranial venous drainage with the external vertebral venous plexus. : Sort of? The more immediate connection is with the internal vertebral plexus, but these communicate with the external. : : 10. The most anterior extent of the superior sagittal sinus may connect to the nasal cavity by way of the foramen cecum. : T : : 11. At the posterior extent of the tentorial notch is the meeting of the straight sinus with the inferior sagittal sinus. : T : : 12. The superior petrosal sinus connects the cavernous sinus with the transverse sinus. : : 13. The superior and inferior ophthalmic veins connect orbit with the cavernous sinus. : T : : 14. An emissary vein through the cartilage of the lacerate foramen connects the cavernous sinus to the pterygoid venous plexus. : T : : 15. The inferior petrosal sinus connects the cavernous to the basilar venous plexed and then to the internal anterior vertebral venous plexus. : T : : 16. The sphenoparietal sinus connects the cavernous sinus to the region of the pterion. : T? : : 17. The anterior and posterior intercavernous sinuses connect one cavernous sinus to the other cavernous sinus. : T : : 18. The occipital sinus connects the confluence of the sinuses with the internal posterior vertebral venous plexus. : T : : 19. The marginal sinus surrounds the margin of the foramen magnum. : T? : : 20. The right transverse sinus tends have a larger diameter than the left transverse sinus. : T - it's usually formed by the superior sagittal sinus, and the left is the continuation of the straight sinus. (Does this have any correlations with right/left hand dominance and/or the right brain/left brain psychology stuff?) : : 21. The diaphragma sellae forms a dural shelf superior to the hypophyseal fossa and contains the intercavernous sinuses. : T : : 22. The greater superficial nerve, but not the lesser superficial petrosal nerve, extends into the lacerate foramen. : T : : 23. The facial, vestibulocochlear, glosspharyngeal, vagus, and hypoglossal nerves all leave the posterior cranial fossa to become extracranial. : T : : 24. The cribriform plate of the ethmoid bone is located in the anterior cranial fossa. : T : : 25.

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