Cranial Nerves (FINAL)

Question 1

Nerve I - Name & Function

Answer 1

Olfactory
Sensory: smell

Question 2

Nerve II - Name & Function

Answer 2

Optic
Sensory: vision

Question 3

Nerve III - Name & Function

Answer 3

Oculomotor
Motor: ciliary muscles, sphincter pupillae, all extrinsic muscles of the eye except those listed in CN IV and VI

Question 4

Nerve IV - Name & Function

Answer 4

Trochlear
Motor: superior oblique muscle of the eye

Question 5

Nerve V - Name & Function

NOTE: sensory & motor functions

Answer 5

Trigeminal
Sensory: face, sinuses, teeth
Motor: muscles of mastication

Question 6

Nerve VI - Name & Function

Answer 6

Abducent
Motor: lateral rectus muscle of eye

Question 7

Nerve VII - Name & Function

NOTE: 2 motor, 1 sensory function

Answer 7

Facial

Motor (primary): muscles of facial expresssion

Motor (intermediate): submandibular, sublingual, lacrimal glands

Sensory: taste to anterior 2/3 of tongue, soft palate

Question 8

Nerve VIII - Name & Function

NOTE: 2 sensory functions

Answer 8

Vestibulocochlear

Sensory (vestibular n.): orientation, motion

Sensory (cochlear n.): hearing

Question 9

Nerve IX - Name & Function

NOTE: 1 motor, 2 sensory

Answer 9

Glossopharyngeal

Motor: stylopharyngeus muscle, parotid gland

Sensory (taste): posterior 1/3 of tongue

Sensory (general sensation): pharynx, tonsillar sinus, pharyngotympanic tube, middle ear cavity

Question 10

Nerve X - Name & Function

NOTE: 1 motor, 1 sensory

Answer 10

Vagus

Motor: palate, pharynx, larynx, trachea, bronchial tree, heart, GI tract to left colic flexure

Sensory (pharynx, larynx): reflex sensory from tracheobronchial tree, lungs, heart, GI tract to lect colic flexure

Question 11

Nerve XI - Name & Function

Answer 11

Spinal accessory

Motor: sternocleidomastoid & trapezius

Question 12

Nerve XII - Name & Function

Answer 12

Hypoglossal

Motor: all intrinsic and extrinsic muscles of tongue (excluding palatoglossus - a palatine muscle)