Cranial Nerves

Question 1

CN I

NAME, FUNCTION, S/M/B

Answer 1

Olfactory

Smell

Sensory ONLY

Question 2

CN II

NAME, FUNCTION, S/M/B

Answer 2

OPTIC

Relays information from the photoreceptors of the retina

Vision, Visual Fields

Sensory ONLY

Question 3

CN III

NAME, FUNCTION, S/M/B

Answer 3

OCCULOMOTOR

Ciliary contraction, Eye movement, Eyelid movement, Accommodation, Pupil Size

Motor ONLY

Question 4

CN IV

NAME, FUNCTION, S/M/B

Answer 4

TROCHLEAR

Eye Movement (S. Oblique - down and lateral movement)

Motor ONLY

Question 5

CN V

NAME, FUNCTION, S/M/B

Answer 5

TRIGEMINAL

SENSORY: face, conjunctiva, oropharynx, nasopharynx

MOTOR: Mm. of mastication, tensor palatine

BOTH

Question 6

CN VI

NAME, FUNCTION, S/M/B

Answer 6

ABDUCENS

Lateral Eye Movement

Motor ONLY

Question 7

CN VII

NAME, FUNCTION, S/M/B

Answer 7

FACIAL

Motor: Muscles of facial expression, digastric, stylohyoid

Lacrimal glands, nasal glands, palatine glands

SENSORY: TASTE (Anterior ⅔ of tongue), Tympanic membrane, external ear

BOTH

Question 8

CN VIII

NAME, FUNCTION, S/M/B

Answer 8

VESTIBULOCOCHLEAR

Static Equilibrium, Dynamic Equilibrium, Sound

BOTH

Question 9

CN IX

NAME, FUNCTION, S/M/B

Answer 9

GLOSSOPHARYNGEAL

SENSORY: Pharynx, Soft Palate, TASTE Posterior ⅓ of Tongue, carries information from the carotid sinus to the medulla

MOTOR: Maintains patency by elevating pharynx (stylopharyngeus)

Question 10

CN X

NAME, FUNCTION, S/M/B

Answer 10

VAGUS

Main Parasympathetic Nerve (90% of PSNS outflow comes from the Vagus)

BOTH

Question 11

CN XI

NAME, FUNCTION, S/M/B

Answer 11

ACCESSORY

Sternocleidomastoid, Trapezius

Motor ONLY

It does have vagal components that travel to the pharynx and soft palate

Question 12

CN XII

NAME, FUNCTION, S/M/B

Answer 12

HYPOGLOSSAL

Extrinsic and Intrinsic muscles of the tongue

Motor ONLY