Cranial Nerves

Question 1

CN II ==> optic n.

Answer 1

S
vision
contralateral pupillary reaction to light (afferent limb of reflex)

Question 2

CN III ==> oculomotor n.

Answer 2

M
eyelid opening
most extraocular movements (except L dev and diagonal down-M)
ipsilateral pupillary reaction to light (efferent limb of reflex)

Question 3

CN IV ==> trochlear n.

Answer 3

M

diagonal down-M rot of eye

Question 4

CN V ==> trigeminal n.

Answer 4

B
facial sensation
jaw clenching and L movement (chewing)

Question 5

CN VI ==> abducens n.

Answer 5

M

L dev of eye

Question 6

CN VII ==> facial n.

Answer 6

B
taste: salty, sweet, and sour on A 2/3 of tongue
facial movements (expressions)
closing eyelid
closing mouth
saliva production, tear production, and nasal mucosa secretions

Question 7

CN VIII ==> vestibulocochlear

Answer 7

S

hearing and balance/equilibrium

Question 8

CN IX ==> glossopharyngeal n.

Answer 8

B
P portions of eardrum and ear canal
taste for sour and bitter on P 1/3 of tongue
control of pharynx
saliva production

Question 9

CN X ==> vagus n.

Answer 9

B
pharynx and larynx sensation
palate, pharynx, and larynx movement
ANS control of thoracic and abdominal viscera

Question 10

CN XI ==> spinal accessory n.

Answer 10

M

SCM and trap

Question 11

CN XII ==> hypoglossal n.

Answer 11

M

tongue

Question 12

CN I ==> olfactory n.

Answer 12

S

smell