Cranial nerves

Question 1

Hole CN1 goes through

Answer 1

cribriform plate

Question 2

function of CN 2

Answer 2

vision and pupillary light reflex

Question 3

what does optic nerve exit through?

Answer 3

optic foramen

Question 4

motor innervation of occulomotor nerve

Answer 4

superior, inferior and medial rectus
inferior oblique muscle
levator palperbrae superioris muscles

Question 5

PS innervation of occulomotor nerve

Answer 5

sphincter pupillae and ciliary muscle of the eyeball

Question 6

trochlear motor innervation

Answer 6

superior oblique muscle

Question 7

what exits through the superior orbital fissure?

Answer 7

CN3, occulomotor
CN4, trochlear
and V1, opthalmic branch of trigeminal
CN 6 - abducens

Question 8

trigeminal sensory innervation

Answer 8

via opthalmic V1 branch - general sensation

Question 9

motor CN5 innervation

Answer 9

trigeminal maxillary and mandibular muscles of mastication: tensor tympani, temporal is and masseter

Question 10

Where do V2 and V3 exit from?

Answer 10

2 - trigeminal maxillary

3- trigeminal mandibular

Question 11

where does CN 6 exit from and what does it innervate?

Answer 11

of the lateral rectus

exits from superior orbital fissure

Question 12

facial sensory innervation

Answer 12

anterior 2/3 or tongue

Question 13

CN 7 motor innervation

Answer 13

muscles of facial expression - stapedius muslce.

facial movement and tension on middle ear bones

Question 14

facial PS innervation

Answer 14

salivary and lacrimal glands

Question 15

where does CN 7 exit from?

Answer 15

internal auditory meatus

Question 16

vestibulocochlear nerve

Answer 16

CN 8 sensory from vestibular apparatus - cochlea.

exits from internal auditory meatus

Question 17

CN 9 sensory supply

Answer 17

pharynx, posterior 1/3 of tongue, eustachian tube, middle ear

Question 18

motor glossopharyngeal nreve supply

Answer 18

stylopharyngeus muscle

Question 19

PS CN 9

Answer 19

parotid salivary gland

Question 20

where does glossopharyngeal exit from?

Answer 20

jugular foramen

Question 21

Vaugs sensory supply

Answer 21

pharynx, larynx, tachea, oesophagus, external ear

(thoracic and abdominal viscera e.g. aortic arch)

so general sensation (and visceral sensation)

Question 22

motor CN 10 supply

Answer 22

soft palate, larynx, pharynx, upper oesophagus.

so speech and swallowing

Question 23

Vagus PS innervation

Answer 23

thoracic and abdominal viscera. innervation of smooth muscle in reps, cardiac and GI tract.

Question 24

where does vestibulocochlear exit from?

Answer 24

internal auditory meatus

Question 25

where does CN 10 exit from?

Answer 25

jugular foramen

Question 26

Accessory nerve

Answer 26

sternomastoid and trapezius muscle. exits from jugular foramen

Question 27

Hypoglossal

Answer 27

intrinsic and extrinsic muscles of the tongue. exits in hypoglossal canal

Question 28

what exits from the jugular foramen?

Answer 28

glossopharyngeal, vagus and accessory

Question 29

what innervates the pharynx?

Answer 29

Glossopharyngeal and vagus do sensory.

CN 9 does stylopharyngeus motor
CN 10 does pharynx motor

Question 30

tongue innervation

Answer 30

motor extrinsic and intrinsic muscles are hypoglossal

facial = sensory to ant 2/3 of tongue

glosssopharyngeal = sensory to posterior 1/3 of tongue