Cranial Nerves

Question 1

All Nerves

Answer 1

I Olfactory
II Optic
III Oculomotor
IV Trochlear
V Trigeminal
VI Abducens
VII Facial
VIII Acoustic
IX Glossopharyngeal
X Vagus
XI Spinal Accessory
XII Hypoglossal

Question 2

I Olfactory

Answer 2

Infant: difficult to test
Children: identifies smells thru each nostril

Question 3

II Optic

Answer 3

Infant: looks at face and tracks eyes
Children: intact visual acuity, peripheral vision, color vision

Question 4

III Oculomotor

Answer 4

Infant: blinks in response to light, has pupils that are reactive to light
Children: no nystagmus and PERRLA is intact

Question 5

IV Trochlear

Answer 5

Infant: looks at face and tracks with eyes
Children: looks down and in with eyes

Question 6

V Trigeminal

Answer 6

Infant: rooting and sucking reflexes
Children: clench teeth, detects touch on face with eyes closed

Question 7

VI Abducens

Answer 7

Infant: looks at face and tracks with eyes
Children: sees laterally

Question 8

VII Facial

Answer 8

Infant: symmetric facial movements
Children: differentiate between salty and sweet on tongue, symmetric facial movements

Question 9

VIII Acoustic

Answer 9

Infant: tracks sound, blinks in response to loud noise
Children: no experience with vertigo, intact hearing

Question 10

IX Glossopharyngeal

Answer 10

Infant: intact gag reflex
Children: intact gag reflex, taste sour on back of tongue

Question 11

X Vagus

Answer 11

Infant: no difficulties swallowing
Children: speech clear, no difficulties swallowing, uvula is midline

Question 12

XI Spinal Accessory

Answer 12

Infant: moves shoulders symmetrically
Children: equal strength of shoulder shrug against examiner’s hands

Question 13

XII Hypoglossal

Answer 13

Infant: no difficulties swallowing, opens mouth when nares occluded
Children: midline tongue, move tongue in all directions with equal strength against tongue blade resistance