Cranial Nerves

Question 1

CN I

• name
• SMR?
• abnormal findings

Answer 1

olfactory
S: smell
anosmia (no smell)
parosmia (altered smell)

Question 2

CN II

• name
• SMR?
• abnormal findings

Answer 2

optic
S: visual acuity test, visual field test, pupillary light reflex
Bitemporal hemianopsia

Question 3

CN III

• name
• SMR?
• abnormal findings

Answer 3

occulomotor
M: pupillary light reflex, accommodation reflex, eye opening (levator palpable superiors), eye movements (adduction MR, elevation SR, depression IR, elevation+adduction IO)
mydriasis, ptosis, lateral strabismus

Question 4

CN IV

• name
• SMR?
• abnormal findings

Answer 4

trochlear

M: eye movements (depression+adduction SO)

Question 5

CN V

• name
• SMR?
• abnormal findings

Answer 5

trigeminal
S: ophthalmic, maxillary, mandibular sensation
M: testing muscles of mastication (temporals and masseter)
R: corneal reflex and jaw jerk reflex
trigeminal neuralgia

Question 6

CN VI

• name
• SMR?
• abnormal findings

Answer 6

abducens
M: eye movements (abduction LR)
medial strabismus

Question 7

CN VII

• name
• SMR?
• abnormal findings

Answer 7

facial
S: taste ant 2/3 of tongue
M: muscles of facial expression
bells palsy

Question 8

CN VIII

• name
• SMR?
• abnormal findings

Answer 8

vestibule-cochlear
S: whisper, webbers, and rinnes test
conductive or sensorimotor hearing loss

Question 9

CN IX

• name
• SMR?
• abnormal findings

Answer 9

glossopharyngeal
S: taste post 1/3 of tongue
M: swallow, ahh
R: gag reflex

Question 10

CN X

• name
• SMR?
• abnormal findings

Answer 10

vagus
M: swallow, ahh
R: gag reflex

Question 11

CN XI

• name
• SMR?
• abnormal findings

Answer 11

spinal accessory

M: traps and SCM strength

Question 12

CN XI

• name
• SMR?
• abnormal findings

Answer 12

hypoglossal
M: tongue movements (tongue out and against cheek)
If it veers off to one side lesion is on same side