Cranial Nerves

Question 1

Olfactory

Answer 1

CNI

Sensory- Smell

Question 2

Optic

Answer 2

CNII

Sensory- Vision

Question 3

Oculomotor

Answer 3

CNIII
Motor- most EOM movement, opening of eyelids
Parasympathetic- pupil constriction, lens shape

Question 4

Trochlear

Answer 4

CNIV

Motor- Down and inward movement of eye

Question 5

Trigeminal

Answer 5

CNV
Motor- muscles of mastication
Sensory- sensation of face and scalp, cornea, mucous membranes of mouth and nose

Question 6

Abducens

Answer 6

CNVI

Motor- Lateral movement of the eye

Question 7

Facial

Answer 7

CNVII
Motor- facial muscles, close eye, labial speech, close mouth
Sensory- taste (sweet, salty, sour, bitter) on anterior two thirds of tongue
Parasympathetic- saliva and tear secretion

Question 8

Acoustic

Answer 8

CNVIII

Sensory- hearing and equilibrium

Question 9

Glossopharyngeal

Answer 9

CNIX
Motor- pharynx (phonation and swallowing)
Sensory- taste on posterior 1/3 of tongue
Parasymphathetic- parotid gland and carotid reflex

Question 10

Vagus

Answer 10

CNX
Motor- pharynx and larynx (talking and swallowing)
Sensory- general sensation from carotid body, carotid sinus, pharynx and viscera
Parasympathetic- carotid reflex

Question 11

Spinal accessory

Answer 11

CNXI

Motor- movement of trapezius and sternomastoid

Question 12

Hypoglossal

Answer 12

CNXII

Motor- movement of tongue

Question 13

Olfactory AF

Answer 13

anosmia

Question 14

optic nerve AF

Answer 14

Defect in or absent central vision
Defect in peripheral vision, hemainopsia
Absent light reflex
Papilledema
Optic atrophy
Retinal lesions

Question 15

oculomotor nerve AF

Answer 15

Dilated pupils, ptosis, eye turns out and slightly down
Failure to move eye up, in, down
Absent light reflex

Question 16

trochlear nerve AF

Answer 16

Failure to turn eye down or out

Question 17

trigeminal nerve AF

Answer 17

Absent touch and pain, paresthesias
No blink
Weakness of messier or temporal is muscles

Question 18

abducens nerve AF

Answer 18

Failure to move laterally, diplopia on lateral gaze

Question 19

facial nerve AF

Answer 19

Absent or asymmetric facial movement

Loss of taste

Question 20

acoustic nerve AF

Answer 20

Decrease or loss of hearing

Question 21

vagus nerve AF

Answer 21

Uvula deviates to side
No gag reflex
Hoarse or brassy
Nasal twang
Husky
Dysphagia, fluids regurgitate

Question 22

hypoglossal nerve AF

Answer 22

Deviates to side

Slowed rate of movement

Question 23

paresis

Answer 23

weakness of muscles rather than paralysis

Question 24

spinal nerve AF

Answer 24

Absent movement of sternomastoid or trapezius