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7 Cards in this Set

  • Front
  • Back
CN I
Olfactory N impaired w/ broken nose - disruption of cribiform plate
CN III
Increased intracranial P
Aneurysm of PCA or Superior Cerebellar Artery
CN V
exits at the Pons - many causes of lesion: infxn, inflammation, tumor
CN VI
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
CN VII
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
CN IX
uncommon; jugular foramen sxme, neck tumor
CN X
uncommon: aneurysm of aortic arch; larynx/thyroid cancer or surgery (recurrent laryngeal)