Cranial Nerves

Question 1

CN I

Answer 1

Olfactory; smell from nasal mucosa

Question 2

CN II

Answer 2

Optic; vision

Question 3

CN III

Answer 3

Oculomotor; motor to raise upper eyelid, motor to 4 extrinsic eye muscles, parasympathetic to change shape of lens and constrict pupil

Question 4

CN IV

Answer 4

Trochlear; motor to superior oblique m

Question 5

CN V

Answer 5

Trigeminal; chief sensory nerve of face, motor to muscles of mastication

Question 6

CN VI

Answer 6

Abducens; motor to lateral rectus m

Question 7

CN VII

Answer 7

Facial; muscles of facial expression, taste to anterior 2/3 of tongue, parasympathetic to salivary glands (except parotid)

Question 8

CN VIII

Answer 8

Vestibulocochlear; hearing, balance and equilibrium, position and movement of head

Question 9

CN IX

Answer 9

Glossopharyngeal; motor to stylopharyngeus (swallowing), parasympathetic to parotid, general and special sensory to posterior 1/3 of tongue, general sensory to pharynx and palatine tonsils, visceral sensory to carotid sinus and carotid body

Question 10

CN X

Answer 10

Vagus; motor to larynx and pharynx, parasympathetic to heart, lungs and GI viscera, visceral sensory of thorax and abdomen, special sensory to taste bus of epiglottis

Question 11

CN XI

Answer 11

Accessory (Spinal); motor to sternocleidomastoid and trapezius mm

Question 12

CN XII

Answer 12

Hypoglossal; motor to intrinsic and extrinsic mm of tongue