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HS Exam 3 > Intro to Cranial Nerves > Flashcards

Intro to Cranial Nerves Flashcards

1
Q

CN1

A

sensory

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2
Q

CN2

A

sensory

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3
Q

CN3

A

motor

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4
Q

CN4

A

motor

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5
Q

CN5

A

both

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6
Q

CN6

A

motor

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7
Q

CN7

A

both

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8
Q

CN8

A

sensory

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9
Q

CN9

A

both

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10
Q

CN10

A

both

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11
Q

CN11

A

motor

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12
Q

CN12

A

motor

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13
Q

CN I

A

olfactory nerve (smell)

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14
Q

anosmia

A

inability to smell

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15
Q

CN II

A

optic nerve (vision)

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16
Q

papilledema

A

swelling of optic disk due to high intracranial pressure

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17
Q

bitemporal hemianopsia

A

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

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18
Q

CN III

A

oculomotor nerve- eye movements (extraoccular muscle)

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19
Q

CN IV

A

trochlear nerve- extraoccular muscles

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20
Q

CN VI

A

abducent nerve- extraoccular muscles

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21
Q

muscles innervated by CN III somatic

A 
superior rectus
medial rectus
inferior rectus
inferior oblique
levator palpebrae
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22
Q

muscles innervated by CN III visceral

A

sphincter of pupil

ciliary muscle

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23
Q

muscle innervated by CN IV

A

superior oblique

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24
Q

muscle innervated by CN VI

A

lateral rectus

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25
Q

ptosis and cause

A

drooping of upper eye lid

loss of elevator palpebrae muscle

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26
Q

what causes down and out pupil

A

lesion of CNIII- unopposed lateral rectus and superior oblique muscles

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27
Q

diplopia

A

double vision

28
Q

symptoms of complete lesion of CN III

A 
down and out pupil
ptosis
diplopia
dilated pupil with no pupillary reflex
no lens accommodation
29
Q

trochlear nerve lesion

A

in and up eye- can’t look down

30
Q

abducent nerve lesion

A

cross eyed- full adduction with no abduction

31
Q

CN V

A

trigeminal nerve- sensory nerve to face

32
Q

divisions of trigeminal nerve (CNV)

A

ophthalmic CN V1
maxillary CN V2
mandibular CN V3

33
Q

CN V1 sensory

A

middle of forehead down anterior nose, including anterior scalp

34
Q

CN V2 sensory

A

side of face down to upper lip

35
Q

CN V3 sensory

A

side of face, bottom, below upper lip to chin

36
Q

CN V3 motor

A 
mastication muscles (temporalis, massetar, lateral pterygoid, medial pterygoid)
mylohyoid
anterior belly of digastric
tensor veli palatine
tensor tympani
37
Q

supeiror orbital fissure nerves

A

C 3, 4, 6, 5/1

38
Q

foramen rotunda nerves

39
Q

foramen ovale nerves

40
Q

trigeminal neuralgia

A

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

41
Q

which CN convey parasympathetics

A

3, 5, 7, 9

42
Q

parasympathetics associated with CN 5

A

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

43
Q

nerves with all 5 fiber types

44
Q

CN VII

A

facial nerve

45
Q

CN VII functions

A 
submandibular, sublingual, lacrimal glands
senses nasal mucosa membrane
taste from anterior 2/3 of tongue
part of external ear
sphincters around eyes and mouth
46
Q

parasympathetics associated with CN IV

A

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

47
Q

CN VII somatic motor control muscles

A

facial muscles
posterior belly of digastric
stylohyoid
stapedius

48
Q

bell’s palsy

A

CN VII

unilateral paralysis of facial muscles: droopy mouth, can’t close eye, no forehead wrinkles

49
Q

CN VIII

A

vestibulo-cochlear nerve

50
Q

hole for CNVIII

A

internal acoustic meatus

51
Q

components of CN VIII

A

vestibular- equlibrium and balance

cochlear- hearing

52
Q

CN IX

A

glossopharyngeal nerve

53
Q

hole for CN IX

A

jugular foramen

54
Q

functions of CN IX

A

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

55
Q

CN X

A

vagus nerve

56
Q

hole for CN X

A

jugular foramen

57
Q

functions of CN X

A

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

58
Q

CN XI

A

accessory nerve

59
Q

CN XII

A

hypoglossal nerve

60
Q

function of CN XII

A

motor to tongue

61
Q

optical canal

62
Q

superior orbital fissure

A

CN III, CN IV, CN VI, CN V1

63
Q

foramen rotundum

64
Q

foramen ovale

65
Q

internal acoustic meatus

A

CN VII, CN VIII

66
Q

jugular foramen

A

CN IX, CN X, XI

67
Q

hypoglossal acnal

HS Exam 3 (20 decks)

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