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Cranial Nerves and Pterygopalatine Fossa F/T

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Posted by Gary and Michelle on December 09, 2014 at 11:15:39:

1. The pharyngeal plexus derived from the vagus nerve supplies SVE fibers to the middle constrictor whereas the pharyngeal plexus derived from the glossopharyngeal nerve provides GVA fibers to pharyngeal mucosa lining the middle constrictor. TRUE

2. All three of the constrictor muscles receive motor innervation as SVE from the vagus whereas the mucosa on their internal surfaces have GSA for nasopharynx, GVA glossopharyngeal for oropharynx, and GVA vagus for hypopharynx. FALSE GVA from vagus for nasopharynx

3. Referred pain from laryngeal or pharyngeal cancers may occur at the external auditory meatus. This reflects the activities of the great auricular nerve and of the lesser occipital nerve. FALSE? Arnold/auricular branch of vagus n and Jacobson/tympanic branch of glossopharyngeal n

4. The tympanic branch of the glossopharyngeal nerve passes through the mastoid canaliculus. FALSE auricular branch of vagus; tympanic branch of glossopharyngeal n passes through tympanic canaliculus

5. The zygomaticotemporal nerve leaves the lateral wall of the orbit superior to the exit of the zygomaticofacial nerve. TRUE

6. The SVA component of the greater superficial petrosal nerve distributes along all the branches of the maxillary nerve that occur within the pterygopalatine fossa. FALSE Hard and soft palate only

7. Parasympathetic postganglionic fibers, but not postganglionic sympathetic fibers, distribute with the lateral posterior nasal nerves to the turbinates. FALSE the conchae receive both parasympathetic and sympathetic postganglionic fibers along the lateral posterior nasal n distribution to regulate secretions

8. The recurrent tympanic nerve, a branch of the chorda tympani, enters the tympanic cavity to provide SVE innervation to salpingopharyngeus. FALSE recurrent tympanic n is a branch of glossopharyngeal n, not a branch of chorda tympani and is GVA to parotid gland after synapsing at otic ganglion; chorda tympani is a branch of facial n and provides SVA to anterior 2/3 of tongue and GVE to submandibular and sublingual glands

9. The superior alveolar processes receive GSA innervation by the superior posterior, middle, and anterior alveolar branches of the maxillary and infraorbital nerves. TRUE

10. The mucosa of the maxillary sinus receives postganglionic fibers having cell bodies in the ciliary ganglion. FALSE pterygopalatine ganglion

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