CRANIAL NERVES

Question 1

OLFACTORY NERVE

Answer 1

CN I

Major Fx: Sense of smell

Question 2

OPTIC NERVE

Answer 2

CN II

Major Fx: Vision

Question 3

OCULOMOTOR NERVE

Answer 3

CN III

Major Fx: Eye movements: Pupillary constriction and accomodation; muscle of upper eyelid

Question 4

TROCHLEAR NERVE

Answer 4

CN IV

Major Fx: Eye movements (intorsion, downward gaze)

Question 5

TRIGEMINAL NERVE

Answer 5

CN V

Motor Fx: Help a person to chew and clench teeth. Gives sensation to muscles in the tympanic membrane of the ear

Question 6

ABDUCENS NERVE

Answer 6

CN VI

Motor Fx: Eye movements (abduction or lateral movements)

Question 7

FACIAL NERVE

Answer 7

CN VII

Motor Fx: Controls the muscle of facial expression; taste from anterior tongue; lacrimal and salivary glands

Question 8

VESTIBULOCOCHLEAR (AUDITORY) NERVE

Answer 8

CN VIII

Motor Fx: Hearing; sense of balance

Question 9

GLOSSOPHARYNGEAL NERVE

Answer 9

CN IX

Motor Fx: Sensation from posterior tongue; carotid baroreceptors and chemoreceptors; salivary gland

Question 10

VAGUS NERVE

Answer 10

CN X

Motor Fx: Autonomic functions of gut; cardiac inhibitation; sensation from larynx and pharnxy; muscles of vocal cords; swallowing

Question 11

ACCESSORY NERVE

Answer 11

CN XI

Motor Fx: Shoulder and neck movements

Question 12

HYPOGLOSSAL NERVE

Answer 12

CN XII

Motor Fx: Movements of tongue