Cranial Nerves Flashcards

1
Q

CN is responsible for 5 special senses:

A

taste
vision
hearing
smell
balance

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2
Q

CN I:
S or M:
Function:
Test:

A

Olfactory N.
Sensory
Smell
place scent under nostril - test each nostril separately

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3
Q

CN II:
S or M:
Function:
Test:

A

Optic N.
Sensory
Vision
Snellen chart/light reflex

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4
Q

CN III:
S or M:
Function:
Test:

A

Oculomotor N.
Motor
Constricts pupil
H-test/light reflex

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5
Q

CN IV:
S or M:
Function:
Test:

A

Trochlear N.
Motor
Eyes movement
H-Test

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6
Q

CN V:
S or M:
Function:
Test:

A

Trigeminal N. (V1, V2, V3)
Sensory & Motor
Mastication of the face muscle
Feel the face for sensory components

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7
Q

CN VI:
S or M:
Function:
Test:

A

Abducens N.
Motor
Lateral eyes movement
H-Test

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8
Q

CN VII:
S or M:
Function:
Test:

A

Facial N.
Sensory & Motor
Taste of tongue/muscles of face
Smile

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9
Q

CN VIII:
S or M:
Function:
Test:

A

Vestibulochoclear N.
Sensory
Head position, sound, equilibrium
Fingertip rub

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10
Q

CN IX:
S or M:
Function:
Test:

A

Glossopharyngeal N.
Sensory & Motor
touch & taste of tongue (pos. 2/3)
Gag reflex/post. tongue taste

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11
Q

CN X:
S or M:
Function:
Test:

A

Vagus N.
Sensory & Motor
Throat & visceral mm.
Phonation “ahh”/ gag reflex

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12
Q

CN XI:
S or M:
Function:
Test:

A

Accessory N.
Motor only
SCM and Trap
resisted shoulder shrug

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13
Q

CN XII:
S or M:
Function:
Test:

A

Hypoglossal N.
Motor
ipsilateral tongue m.
Stick out tongue

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14
Q

what is the cause of Bell’s palsy?

A

injury to CN VII producing paralysis of some or all facial muscles on the affected side

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15
Q

CN VII is vulnerable to compression when ________

A

a viral infection produces inflammation

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16
Q

in a healthy individual, if you shine a light in one eye, which eye(s) will constrict?

A

both

17
Q

which CNs are involved with pupillary light reflex?

A

II (afferent, sensory)
III (efferent, motor)

18
Q

a nerve that sends a signal toward the CNS / away from the stimulus

A

afferent

19
Q

a nerve that sends a signal from the CNS toward muscles, organs

A

efferent

20
Q

if you shine light into the R eye and it constricts but the L eye does not constict, what is the problem?

A

CN III on R works
CN IIII on L does not work

21
Q

if you shine light in L eye and R eye constricts but L does not, what is the problem?

A

CN III left

22
Q
A