CRANIAL NERVES

Question 1

name the cranial nerves 1-12

Answer 1

I olfactory
II optic
III oculomotor
IV trochlear
V trigeminal
VI abducens
VII facial
VIII auditory/vestibulocochlear
IX glossopharyngeal
X vagus
XI accessory
XII hypoglossal

Question 2

trigeminal nerve branches

Answer 2

V1 - opthalmic branch
V2 - maxillary branch
V3 - mandibular branch

Question 3

facial nerve branches from stylomastoid foramen
(terminal motor branches):

Answer 3

temporal
zygomatic
buccal
mandibular
cervical

Question 4

other motor nerve branches of facial nerve

Answer 4

posterior auricular nerve
nerve to digastric: posterior belly
nerve to stapedius: stapedius muscle
nerve to stylohyoid
motor branch of greater petrosal nerve: lacrimal gland & nose

Question 5

sensory branch of facial nerve

Answer 5

sensory branch of greater petrosal nerve: taste to palate
chorda tympani: taste of anterior 2/3 of tongue

Question 6

facial nerve pathway

Answer 6

from hindbrain, enters internal acoustic meatus, facial canal, stylomastoid foramen

Question 7

most slender cranial nerve

Answer 7

trochlear nerve

Question 8

largest cranial nerve

Answer 8

trigeminal nerve

Question 9

longest intracranial nerve

Answer 9

abducent nerve

Question 10

longest extracranial nerve

Answer 10

vagus nerve

Question 11

purely sensory nerves

Answer 11

CN I, II, VIII

Question 12

purely motor nerves

Answer 12

CN III, IV, VI, XI, XII

Question 13

mixed sensory and motor nerves

Answer 13

CN V, VII, IX, X

Question 14

parasympathetic fibers

Answer 14

CN III,VII, IX, X

Question 15

EXIT: CN I

Answer 15

cribriform plate

Question 16

EXIT: CN II

Answer 16

optic canal

Question 17

EXIT: CN III,IV, V1, VI

Answer 17

superior orbital fissure

Question 18

EXIT: CN V2

Answer 18

foramen rotundum

Question 19

EXIT: CN V3

Answer 19

foramen ovale

Question 20

EXIT: CN VII

Answer 20

internal acoustic meatus, facial canal, stylomastoid foramen

Question 21

EXIT: CN VIII

Answer 21

internal acoustic meatus

Question 22

EXIT: CN IX-XI

Answer 22

jugular foramen

Question 23

EXIT: CN XII

Answer 23

hypoglossal canal

Question 24

FUNCTION: CN I

Answer 24

smelling

Question 25

FUNCTION: CN II

Answer 25

vision

Question 26

FUNCTION: CN III

Answer 26

innervates superior, inferior, medial rectus & inferior oblique

Question 27

FUNCTION: CN IV

Answer 27

innervates superior oblique

Question 28

FUNCTION: CN V

Answer 28

v1 - sensory of opthalmic region
v2 - sensory of maxillary region (sensation of ant 2/3 of tongue)
v3 - innervates muscles of mastication

Question 29

FUNCTION: CN VI

Answer 29

innervates lateral rectus

Question 30

FUNCTION: CN VII

Answer 30

sensory: taste of ant 2/3 of tongue - sweet, sour, salty
motor: facial expression, stapedius muscle, stylohyoid, posterior digastric

Question 31

FUNCTION: CN VIII

Answer 31

hearing and head balance

Question 32

FUNCTION: CN IX

Answer 32

sensory: sensation & taste of post 1/3 of tongue - bitter
motor: stylopharyngeal muscle (swallowing) gag reflex

Question 33

FUNCTION: CN X

Answer 33

sensory: taste from epiglottis, vallecula
motor: constrictor muscle of pharynx, intrinsic muscle of larynx, muscle of trachea, bronchi, heart, alimentary tract
uVula

Question 34

FUNCTION: CN XI

Answer 34

innervates sternocleidomastoid muscle and trapezius
muscle of soft palate, pharynx, and larynx

Question 35

FUNCTION: CN XII

Answer 35

tongue muscle