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7 Cards in this Set
- Front
- Back
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CN I
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Olfactory N impaired w/ broken nose - disruption of cribiform plate
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CN III
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Increased intracranial P
Aneurysm of PCA or Superior Cerebellar Artery |
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CN V
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exits at the Pons - many causes of lesion: infxn, inflammation, tumor
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CN VI
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Long intracrain course - may be stretched with increased intracranial P, makes a sharp bend over petrous part of temporal bone
-aneurysm of circle of willis at AICA or labyrinthine artery **Cavernous sinus thrombosis or atherosclerosis of internal cartotid in cavernous sinus |
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CN VII
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Most freq paralyzed
-near geniculate -> -motor, taste, autonomic -central lesion-> contralateral lower face paralysis -between geniculate and chorda tympani: -motor, taste, autonomic, +tears -Bell's palsy: motor deficit only -parotid tumors; temporal bone fracture -may -> hyperaccoustic |
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CN IX
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uncommon; jugular foramen sxme, neck tumor
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CN X
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uncommon: aneurysm of aortic arch; larynx/thyroid cancer or surgery (recurrent laryngeal)
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