Re: Lecture 68: Functional Components Cranial Nerves - True False

Comments:
: : Cranial Nerve Functional Components : : 1. The olfactory nerve fascicles pass through the cribriform plate of the ethmoid bone to enter the nasal cavity from the anterior cranial fossa. : : - true. Correct : : 2. A fracture of the cribriform plate may cause a CSF leak. : : - true. Correct : : 3. The olfactory nerve has native SVA and GVE components. : : - false ⇒ only SVA. Correct. : : 4. A hypophyseal tumor is expected to disrupt central vision. : : - false ⇒ peripheral vision disruption. Correct. : : 5. The chiasmatic groove is posterior to the hypophyseal fossa. : : - false ⇒ anterior. Correct. : : 6. The afferent limb of the pupillary light reflex is mediated by the SSA component of the oculomotor nerve. : : - false ⇒ not SSA. Mediated by SSA of optic nerve. : : 7. A lesion of the proximal superior division of the oculomotor nerve is expected to disrupt GSE and GVE components. : : - false ⇒ superior division doesn't do GVE. Correct. : : 8. Preganglionic GVE cell bodies from the Edinger-Westphal nucleus synapse in the submandibular ganglion. : : - false ⇒ ciliary ganglion. Correct. : : 9. The short ciliary nerves host native GSA fibers non-native preganglionic GVE fibers. : : - false ⇒ opposite of what it says. False, but non-native post gang. : : 10. Postganglionic GVE fibers having cell bodies in the ciliary ganglion mediate accommodation as well as pupillary dilation. : : - false ⇒ pupillary constriction not dilation. Correct. : : 11. A lesion of the greater superficial petrosal nerve at the lacerate foramen disrupts preganglionic GVE fibers that influence lacrimation. : : - true. Correct. : : 12. The short ciliary nerves host non-native postganglionic fibers from both divisions of the autonomic nervous system. : : - true. Correct. : : 13. A lesion of the internal carotid nerve is expected to disrupt preganglionic sympathetic GVE fibers and cause unilateral mydriasis. : : - false ⇒ postganglionic and you'd have miosis. Correct. : : 14. A cavernous sinus infection is expected to cause unilateral pupil dilation given that the sympathetic root of the ciliary ganglion remains healthy. : : - we aren't sure. True. Take out III but spare spare sympathetic. : : 15. A mild ptosis in a young person may be caused by a GVE disturbance whereas a frank ptosis is caused by GSE disturbance. : : - false ⇒ SVE for frank ptosis??. True. Levator palpebrae superioris is GSE. : : 16. Sneezing while looking at bright light is thought to be, in part, mediated by the GSA component of the trigeminal nerve. : : - can you explain the pathway of this reflex??. Corneal irritation. V1 referred to V2 and sneeze reflex. : : 17. The infraorbital nerve, while in the infraorbital canal, carries non-native postganglionic GVE fibers en route to the lacrimal gland. : : - false ⇒ lacrimal nerve. Correct. Follow zygomaticotemporal. Branches before canal. : : 18. The lacrimal nerve proper is GSA only and does not mediate lacrimation. : : - true. Correct. Has hitchhikers that do so. : : 19. Traveling along with the distal parts of the lacrimal nerve are postganglonic GVE fibers whose cell bodies are located in the pterygopalatine ganglion. : : - true. Correct. : : 20. The extraocular muscles, with the exception of the superior oblique, are innervated by SVE fibers. : : - false => extraocular muscles are GSE & GVE. False. But extraocular are all GSE.

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