Assessment -neuro/cranial nerves
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| CN I | S---olfactory----smell, nasal epithelium
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| CN II | S---optic---vision, retina
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| CN III | M---oculomotor---EOM---up/down/medial ---and PUPILARY CONSTRICTION
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| CN IV | M---trochlear---EOM---down/medial
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| CN V | S/M---trigeminal---face/scalp sensations---muscles of mastication
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| CN VI | M---abducens----LATERAL eye movement
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| CN VII | S/M---facial----taste anterior 1/3---facial expression/movement
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| CN VIII | S/M---Aucuoustic (vestibular/equilibrium---cochlear/hearing)
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| CN IX | S/M---glossopharyngeal---taste posterior 1/3---gag/swallow/saliva
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| CN X | S/M---vagus---gag/swallowing---muscles of pharnyx/larynx/esoph/soft palate---psymp chemoreceptors, baroreceptors
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| CN XI | M ---accessory---swallowing---SMC (sternocleidomastoid) & trapezius
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| CN XII | M---hypoglossal---swallowing/tongue movement/talking
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| how do we test CN I | smell soap, coffee, etc.
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| how do we test CN II | controls central & peripheral vision ---have them read or count # of fingers being held up---peripheral vision test
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| peripheral vision tests for what CN | CN II optic
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| how do we test CN III | pupilary response to light
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| When we do PERRLA, what CNs are we testing? | CN III pupilary response---CN IV accomodation test
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| how do we test CN IV | accomodation test to check down/medial EOM
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| When we check for ptosis, what CN | CN III by checking where eyelid falls on pupil
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| If a pt has a problem with CN V, where would it show up? | on their forehead---cheek---jaw
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| To test sensory fx of CN V, what would you do | check their scalp, forehead, cheek and jaw for sensations
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| to test motor fx of CN V, what would you do | test motor function of temporal & masseter muscles by assessing jaw opening strength
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| if I suspect a problem with CN VI and VII, what should I do | check corneal reflex with cotton wisp
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| how do I test CN VI | EOM lateral tested by 6 cardinal fields of gaze
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| how do I test CN VIII for hearing aspect | rub my fingers together next to pt ear
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| how do I test for CN VII | assess for facial symmetry---close eyes/smile/pucker/show teeth/puff cheeks----when smiling observe nasolabial folds for weakness/flattening
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| How do I test CN IX and X | taste on posterior 1/3---ability to swallow---gag reflex---Ahhh test palate should rise/uvula midline
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| How do I test CN XI | place hands on pt shoulders, ask them shrug (trapezius)---ask pt to turn head against my hand (SCM)
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| How do I test for CN XII | stick out tongue, midline. problems eating/swallowing/chewing-----also assess with CN IX and X
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| EOMs tested by 6 cardinal fields of gaze, specifically test which CNs | CN III, IV and VI
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| rooting reflex | CN V
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| response to loud noise---startle---blink---looking for noise with eyes or turning head ---all are responses for which CN | CN VIII
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| gag reflex---coordinated suck/swallow while feeding (also cerebellar fxn) uses what CNs | CN IX, X and XII
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