Cranial Nerves

Question 1

CN 0 (name and function)

Answer 1

terminal
-sensory: pheromones

Question 2

CN I (name and function)

Answer 2

olfactory
-sensory: smell

Question 3

CN II (name and function)

Answer 3

optic
-sensory: vision

Question 4

CN III (name and function)

Answer 4

oculomotor
-motor to muscles of eye
-ANS constrictor/dilator of pupil in pupillary reflex

Question 5

CN IV (name and function)

Answer 5

trochlear
-motor to muscle of eye: dorsal oblique muscle

Question 6

CN V (name and function)

Answer 6

trigeminal
-ophthalmic and maxillary branches
-sensory: mandibular branch motor to muscles of mastication
-sensory: to face

Question 7

CN VI (name and function)

Answer 7

abducent
-motor to eye muscles: lateral rectus and retractor bulbi

Question 8

CN VII (name and function)

Answer 8

facial
-motor to muscles of facial expression
-sensory: taste, parts of ear
-ANS: glands

Question 9

CN VIII (name and function)

Answer 9

vestibulocochlear
-sensory: hearing and balance

Question 10

CN IX (name and function)

Answer 10

glossopharyngeal
-motor: larynx/pharynx
-sensory: pharynx and part of tongue, taste
-ANS: glands

Question 11

CN X (name and function)

Answer 11

vagus
-motor: larynx/pharynx
-sensory: larynx, thoracic and GI viscera
-ANS: thorax, abdomen

Question 12

CN XI (name and function)

Answer 12

accessory
-motor to some neck muscles

Question 13

CN XII (name and function)

Answer 13

hypoglossal
-motor to tongue

Question 14

Cerebrum contains which CN

Answer 14

CN 0, CN I

Question 15

Diencephalon contains which CN

Answer 15

CN II

Question 16

Midbrain contains which CN

Answer 16

CN III, CN IV

Question 17

Pons contains which CN

Answer 17

CN V

Question 18

Medulla contains which CN

Answer 18

CN VI, CN VII, CN VIII, CN IX, CN X, CN XI, CN XII

Question 19

What does the sphenoid bone complex contain?

Answer 19

-optic canal
-orbital fissure
-rostral and caudal alar foramen
-oval foramen

Question 20

Which CN exit through optic canal?

Answer 20

CN II

Question 21

Which CN exit through orbital fissure?

Answer 21

CN III, CN IV, CN V (ophthalmic), CN VI

Question 22

Which CN exit through rostral alar foramen/round foramen?

Answer 22

CN V (maxillary)

Question 23

Which CN exit through oval foramen?

Answer 23

CN V (manibular)

Question 24

Which CN?
-receptors in vomeronasal organ
-pheromones enter the incisive ducts located on either side of the incisive papilla
-vomeronasal nerves travel through cribriform plate to the accessory olfactory bulb

Answer 24

CN 0

Question 25

Which CN?
-receptors are in olfactory epithelium of caudal nasal passages
-axons pass through the cribriform plate to the olfactory bulbs

Answer 25

CN I

Question 26

Which CN?
-receptors in retina
-enters optic canals
-cross at optic chiasm

Answer 26

CN II

Question 27

Which CN?
-motor to muscles that move the eye
-passes through orbital fissure

Answer 27

CN III

Question 28

Which CN?
-motor to superior (dorsal) oblique muscle of eye
-passes through orbital fissure

Answer 28

CN IV