Cranial Nerve Functions

Question 1

CN I: Olfactory Nerve

Answer 1

Smell

Question 2

CN II: Optic Nerve

Answer 2

Vision

Question 3

CN III: Oculomotor Nerve

Answer 3

Some eye movement, pupil constriction, lens accommodation, eyelid elevation.

Question 4

CN IV: Trochlear Nerve

Answer 4

Eye movement: downward and laterally

Question 5

CN V: Trigeminal Nerve

Answer 5

Facial sensation, chewing muscles

Question 6

CN VI: Abducens Nerve

Answer 6

Moves the eyes laterally (lateral rectus muscle)

Question 7

CN VII: Facial Nerve

Answer 7

Facial expressions, taste (anterior 2/3 of the tongue), salivation, lacrimation

Question 8

CN VIII: Vestibulocochlear Nerve

Answer 8

Hearing, balance

Question 9

CN IX: Glossopharyngeal Nerve

Answer 9

Taste (posterior 1/3 of the tongue), swallowing, salivation, blood pressure regulation

Question 10

CN X: Vagus Nerve

Answer 10

Parasympathetic control of the heart, lungs, and digestive tract; taste & swallowing

Question 11

CN XI: Accessory Nerve

Answer 11

Controls neck and shoulder movement (sternocleidomastoid and trapezius muscles)

Question 12

CN XII: Hypoglossal Nerve

Answer 12

Tongue movement