Intro to Cranial Nerves

Question 1

CN1

Answer 1

sensory

Question 2

CN2

Answer 2

sensory

Question 3

CN3

Answer 3

motor

Question 4

CN4

Answer 4

motor

Question 5

CN5

Answer 5

both

Question 6

CN6

Answer 6

motor

Question 7

CN7

Answer 7

both

Question 8

CN8

Answer 8

sensory

Question 9

CN9

Answer 9

both

Question 10

CN10

Answer 10

both

Question 11

CN11

Answer 11

motor

Question 12

CN12

Answer 12

motor

Question 13

CN I

Answer 13

olfactory nerve (smell)

Question 14

anosmia

Answer 14

inability to smell

Question 15

CN II

Answer 15

optic nerve (vision)

Question 16

papilledema

Answer 16

swelling of optic disk due to high intracranial pressure

Question 17

bitemporal hemianopsia

Answer 17

tunnel vision due to compression of the optic chiasm by a pituitary tumor

Question 18

CN III

Answer 18

oculomotor nerve- eye movements (extraoccular muscle)

Question 19

CN IV

Answer 19

trochlear nerve- extraoccular muscles

Question 20

CN VI

Answer 20

abducent nerve- extraoccular muscles

Question 21

muscles innervated by CN III somatic

Answer 21

superior rectus
medial rectus
inferior rectus
inferior oblique
levator palpebrae

Question 22

muscles innervated by CN III visceral

Answer 22

sphincter of pupil

ciliary muscle

Question 23

muscle innervated by CN IV

Answer 23

superior oblique

Question 24

muscle innervated by CN VI

Answer 24

lateral rectus

Question 25

ptosis and cause

Answer 25

drooping of upper eye lid | loss of elevator palpebrae muscle

Question 26

what causes down and out pupil

Answer 26

lesion of CNIII- unopposed lateral rectus and superior oblique muscles

Question 27

diplopia

Answer 27

double vision

Question 28

symptoms of complete lesion of CN III

Answer 28

``` down and out pupil ptosis diplopia dilated pupil with no pupillary reflex no lens accommodation ```

Question 29

trochlear nerve lesion

Answer 29

in and up eye- can't look down

Question 30

abducent nerve lesion

Answer 30

cross eyed- full adduction with no abduction

Question 31

CN V

Answer 31

trigeminal nerve- sensory nerve to face

Question 32

divisions of trigeminal nerve (CNV)

Answer 32

ophthalmic CN V1 maxillary CN V2 mandibular CN V3

Question 33

CN V1 sensory

Answer 33

middle of forehead down anterior nose, including anterior scalp

Question 34

CN V2 sensory

Answer 34

side of face down to upper lip

Question 35

CN V3 sensory

Answer 35

side of face, bottom, below upper lip to chin

Question 36

CN V3 motor

Answer 36

``` mastication muscles (temporalis, massetar, lateral pterygoid, medial pterygoid) mylohyoid anterior belly of digastric tensor veli palatine tensor tympani ```

Question 37

supeiror orbital fissure nerves

Answer 37

C 3, 4, 6, 5/1

Question 38

foramen rotunda nerves

Answer 38

C 5/2

Question 39

foramen ovale nerves

Answer 39

CN V3

Question 40

trigeminal neuralgia

Answer 40

intense pain burst from pressing on branches of the trigeminal nerve in or around the mouth

Question 41

which CN convey parasympathetics

Answer 41

3, 5, 7, 9

Question 42

parasympathetics associated with CN 5

Answer 42

ciliary ganglion- constrict pupils otic ganglion- parotid gland pterygopalatine ganglion- lacrimal gland submandibular ganglion- sublingual + submandibular glands

Question 43

nerves with all 5 fiber types

Answer 43

7, 9, 10

Question 44

CN VII

Answer 44

facial nerve

Question 45

CN VII functions

Answer 45

``` submandibular, sublingual, lacrimal glands senses nasal mucosa membrane taste from anterior 2/3 of tongue part of external ear sphincters around eyes and mouth ```

Question 46

parasympathetics associated with CN IV

Answer 46

geniculate ganglion- sensory cell bodies for taste pterygopalatine ganglion- visceral for nasal mucosa and lacrimal glands submandibular- lower salivary (submandibular, sublingual)

Question 47

CN VII somatic motor control muscles

Answer 47

facial muscles posterior belly of digastric stylohyoid stapedius

Question 48

bell's palsy

Answer 48

CN VII | unilateral paralysis of facial muscles: droopy mouth, can't close eye, no forehead wrinkles

Question 49

CN VIII

Answer 49

vestibulo-cochlear nerve

Question 50

hole for CNVIII

Answer 50

internal acoustic meatus

Question 51

components of CN VIII

Answer 51

vestibular- equlibrium and balance | cochlear- hearing

Question 52

CN IX

Answer 52

glossopharyngeal nerve

Question 53

hole for CN IX

Answer 53

jugular foramen

Question 54

functions of CN IX

Answer 54

taste buds on posterior 1/3 of tongue gag reflex, baroreceptor and chemoreceptor\ parotid gland\ stylopharyngeus muscle

Question 55

CN X

Answer 55

vagus nerve

Question 56

hole for CN X

Answer 56

jugular foramen

Question 57

functions of CN X

Answer 57

taste buds around epiglottis thoracic and abdominal viscera smooth muscle, modified cardiac, GI glands pro to splenic flexture motor to most of palatine and pharyngeal muscles

Question 58

CN XI

Answer 58

accessory nerve

Question 59

CN XII

Answer 59

hypoglossal nerve

Question 60

function of CN XII

Answer 60

motor to tongue

Question 61

optical canal

Answer 61

CN II

Question 62

superior orbital fissure

Answer 62

CN III, CN IV, CN VI, CN V1

Question 63

foramen rotundum

Answer 63

CN V2

Question 64

foramen ovale

Answer 64

CN V3

Question 65

internal acoustic meatus

Answer 65

CN VII, CN VIII

Question 66

jugular foramen

Answer 66

CN IX, CN X, XI

Question 67

hypoglossal acnal

Answer 67

CN XII