Cranial Nerves

Question 1

Olfactory

Answer 1

I
afferent (sensory)
identify familiar odors

Question 2

Optic

Answer 2

II
afferent (sensory)
test visual fields

Question 3

Oculomotor

Answer 3

III
efferent (motor)
upward, downward, and medial gaze, reaction to light

Question 4

Trochlear

Answer 4

IV
efferent (motor)
downward and inward gaze

Question 5

Trigeminal

Answer 5

V
afferent (sensory), efferent (motor)
corneal reflex, face sensation, clench teeth; push down on chin to separate jaw

Question 6

Abducens

Answer 6

VI
efferent (motor)
lateral gaze

Question 7

Facial

Answer 7

VII
afferent (sensory), efferent (motor)
taster-anterior tongue, close eyes tight, smile and show teeth, whistle and puff cheeks

Question 8

Vestibulocochlear

Answer 8

VIII
afferent (sensory)
hearing tests, balance and coordination tests

Question 9

Glossopharyngeal

Answer 9

IX
afferent (sensory), efferent (motor)
gag reflex, ability to swallow

Question 10

Vagus

Answer 10

X
afferent (sensory), efferent (motor)
gag reflex, ability to swallow, say “ahhh”

Question 11

Accessory

Answer 11

XI
efferent (motor)
resisted shoulder shrug

Question 12

Hypoglossal

Answer 12

XII
efferent (motor)
tongue protrusion-if injured, tongue deviates toward injured side