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Clinical Anatomy 1 > CRANIAL NERVE TRIVIA!!! > Flashcards

CRANIAL NERVE TRIVIA!!! Flashcards

1
Q

What are the branches of CN XII?

A

Hypoglossal n. (motor)

  • genioglossus
  • hyoglossus
  • styloglossus
  • intrinsic mm of tongue
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2
Q

What is the origin of CN XII?

A

hypoglossal

medulla (medial aspect, olive)

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3
Q

What does CN XII travel through?

A

hypoglossal

hypoglossal canal

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4
Q

What is the motor nucl. of CN XII?

A

hypoglossal

hypoglossal nucl.

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5
Q

What are the branches of CN XI?

A

accessory (motor)

  • SCM
  • trapezius
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6
Q

What is the origin of CN XI?

A

accessory

brainstem (C1-5)

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7
Q

What does CN XI travel through?

A

accessory

f. magnum (b/c originates from brainstem)
jugular f.

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8
Q

What are the branches of CN X?

A

vagus

pharyngeal n.

  • branchial motor: palate and pharynx mm
  • parasympathetic: palate and pharynx mucosa
  • sensory touch/proprioception

Internal laryngeal br. of superior laryngeal

  • parasympathetic: epiglottis vocal cord mucosa
  • sensory: touch
  • sensory: taste, epiglottis

External laryngeal br. of superior laryngeal

  • branchial motor: cricothyroid m
  • sensory: proprioception

Recurrent laryngeal n.

  • branchial motor: intrinsic mm of larynx
  • parasympathetic: vocal cord trachea mucosa
  • sensory: proprioception

Vagal trunks

  • sensory: visceral
  • parasympathetic: visc. thorax and abdomen

Thoracic cardiac
- sensory: visceral (aortic arch, mmHg)

Auricular br.
- sensory: touch

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9
Q

What is the origin of CN X?

A

Vagus

medulla

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10
Q

What is the sensory ganglion of CN X?

A

vagus

superior and inferior ganglion (bean)

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11
Q

What does CN X travel through?

A

vagus

jugular f.

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12
Q

What is the branchial motor nucl. of CN X?

A

vagus

nucl. ambiguus

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13
Q

What is the parasympathetic nucl. of CN X?

A

vagus

dorsal motor nucl.

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14
Q

What is the result of a CN X lesion?

A

Branchial motor: dysphagia, weak/hoarse voice, saggy palatal arch, contralat uvula deviation
Pre-para: insignificant if unilateral
Sensory: anesthesia of ext auditory canal
Sensory, visceral: insignificant if unilateral
Taste: insignificant

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15
Q

Which nerves have branchial motor axons?

A

CN V3 - trigeminal, mandibular
CN VII - facial
CN IX - glossopharyngeal
CN X - vagus

(4)

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16
Q

Which nerves have motor, sensory, and parasympathetic axons?

A

CN VII - facial
CN IX - glossopharyngeal
CN X - vagus

(3)

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17
Q

Which nerves originate from the cerebrum?

A

CN I - olfactory

CN II - optic

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18
Q

Which nerves originate from the midbrain?

A

CN III - oculomotor

CN IV - trochlear (contralateral)

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19
Q

Which nerves originate from the pons?

A

CN V1-3 - trigeminal, ophthalmic-maxillary-mandibular
CN VI - abducens
CN VII - facial
CN VIII - vestibulocochlear

(4)

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20
Q

Which nerves originate from the medulla?

A

CN IX - glossopharyngeal
CN X - vagus
CN XII - hypoglossal

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21
Q

Which nerves originate from the brainstem?

A

CN XI - accessory

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22
Q

What are the branches of CN IX?

A

glossopharyngeal

n. to stylopharyngeus
- motor
- sensory

carotid n.

  • sensory: visceral
  • – carotid (O2/CO2)
  • – carotid sinus (mmHg)

lingual br.

  • sensory: taste
  • sensory: post 1/3 tongue

tonsilar br.
- sensory: tonsil bed

pharyngeal br.
- sensory: upper pharynx (gag reflex)

tympanic n.
- sensory: inner ear

lesser petrosal n.
- parasympathetic to otic ganglion to parotid gl. “SPIT”

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23
Q

What is the branchial motor nucl. of CN IX?

A

glossopharyngeal

nucl. ambiguus

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24
Q

What is the parasympathetic nucl. of CN IX?

A

glossopharyngeal

inferior salivatory nucl.

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25
Q

What does CN IX travel through?

A

glossopharyngeal

jugular f.

tympanic canaliculus
- tympanic n.

hiatus for lesser petrosal n.

  • lesser petrosal n.
  • into middle fossa (?)

f. ovale
- lesser petrosal n.

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26
Q

What is the parasympathetic ganglion of CN IX?

A

glossopharyngeal

otic ganglion to parotid gl. “SPIT”

suspended from auriculotemporal n. of CN V3

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27
Q

What is the sensory ganglion of CN IX?

A

glossopharyngeal

superior and inferior ganglion (bean)

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28
Q

What are the branches of CN VII?

A

facial

greater petrosal n. to n. of pterygoid canal

  • sensory: taste (palate) (travels w/ lesser palatine br. of CN V2)
  • parasympathetic to pterygopalatine ganglion to lacrimal gl. “CRY” and to “SNOT”
  • travels with deep petrosal n. (postsympathetic)

chorda tympani

  • sensory: taste, ant 2/3 tongue
  • parasympathetic: submandibular ganglion to sublingual gl. and submandibular gl. “SPIT”

main root

n. to stapedius
- branchial motor
- sensory

posterior auricular n.
- sensory

muscular branches

  • posterior digastric
  • stylohyoid

muscular branches

  • temporal
  • zygomatic
  • buccal
  • mandibular
  • cervical
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29
Q

What does CN VII travel through?

A

facial

internal auditory meatus

stylomastoid f.
- main root to muscular branches (TZBMC, post. digastric, stylohyoid)

petrotympanic fissure
- chorda tympani

hiatus for greater petrosal n.
- greater petrosal n.

pterygoid canal

  • n. of pterygoid canal
  • deep petrosal n. (postsymp)

pterygopalatine fossa

  • pterygopalatine ganglion
  • sensory br. taste (palate)
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30
Q

What is the branchial motor nucl. of CN VII?

A

facial

facial motor nucl.

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31
Q

What is the sensory ganglion of CN VII?

A

facial

geniculate ganglion

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32
Q

What is the parasympathetic nucl. of CN VII?

A

facial

superior salivatory nucl.

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33
Q

What is the origin of CN VII?

A

facial

pons

34
Q

What are the parasympathetic ganglion of CN VII?

A

facial

pterygopalatine ganglion

  • lacrimal gl. “CRY”
  • “SNOT”
  • suspended from trigeminal, maxillary CN V2

submandibular ganglion

  • sublingual and submandibular gl. “SPIT”
  • suspended from lingual br. of trigeminal, mandibular CN V3
35
Q

What are the branches of CN VI?

A

abducens

abducens n.
- motor: lateral rectus

36
Q

What is the motor nucl. of CN VI?

A

abducens

abducens nucl.

37
Q

What does CN VI travel through?

A

abducens

superior orbital fissure

38
Q

What is the origin of CN VI?

A

abducens

pons

39
Q

What are the branches of CN V3?

A

trigeminal, mandibular

meningeal n.
- sensory

deep temporal n.

  • sensory
  • branchial motor

masseteric n.

  • sensory
  • branchial motor

lateral pterygoid n.

  • sensory
  • branchial motor

medial pterygoid n.

  • sensory
  • branchial motor

buccal n.
- sensory

lingual n.

  • sensory: ant 2/3 tongue
  • suspends submandibular ganglion of CN VII

inferior alveolar n.

  • n. to mylohyoid
  • – branchial motor: anterior digastric, mylohyoid
  • – sensory
  • mental n.
  • – sensory

auriculotemporal n.

  • sensory
  • suspends otic ganglion to parotid gl. of CN IX
  • hugs middle meningeal a.
40
Q

What is the branchial motor nucl. of CN V3?

A

trigeminal, mandibular

trigeminal motor nucl.

41
Q

What is the sensory ganglion of CN V3?

A

trigeminal, mandibular

trigeminal ganglion w/ trigeminal sensory nucl.

42
Q

What does CN V3 travel through?

A

trigeminal, mandibular

f. ovale

f. spinosum
- meningeal n.

mandibular f., mental f.
- inferior alveolar n. to mental n.

43
Q

What is the origin of CN V3?

A

trigeminal, mandibular

pons

44
Q

What are the branches of CN V2?

A

trigeminal, maxillary

pharyngeal n.
- sensory

lesser palatine n.
- sensory

greater palatine n.
- sensory

nasopalatine n.
- sensory

posterior superior lateral nasal n.
- sensory

posterior superior medial nasal n.
- sensory

posterior superior alveolar n.
- sensory

infraorbital n.
- sensory

anterior superior alveolar n.
- sensory

middle superior alveolar n.
-sensory

zygomatic n.

  • sensory
  • carries postpara to communicating br. to lacrimal br. V1 to lacrimal gl.
45
Q

What does CN V2 travel through?

A

trigeminal, maxillary

f. rotundum
pterygopalatine fossa

palatovaginal canal
- pharyngeal n.

lesser palatine f.
- lesser palatine n.

greater palatine f.
- greater palatine n.

sphenopalatine f.

  • n. to post. sup. lat./med. nasal
  • nasopalatine n.

incisive fossa
- nasopalatine n.

pterygomaxillary fissure
- posterior superior alveolar n.

infraorbital groove/canal/foramen

  • infraorbital n.
  • ant. sup. alveolar n.
  • mid. sup. alveolar n.

inferior orbital fissure
- zygomatic n.

46
Q

What is the origin of CN V2?

A

trigeminal, maxillary

pons

47
Q

What parasympathetic ganglion is suspended from CN V2?

A

trigeminal, maxillary

pterygopalatine ganglion CN VII

48
Q

What is the sensory ganglion of CN V2?

A

trigeminal, maxillary

trigeminal ganglion w/ trigeminal sensory nucl.

49
Q

What are the branches of CN V1?

A

trigeminal, ophthalmic

lacrimal n.
- sensory
--- lacrimal gl.
--- cutaneous skin of forehead
(communicating br. to V3)

frontal n.

  • supraorbital n.
  • – sensory to skin above eye
  • supratrochlear n.
  • – sensory to skin of forehead

nasociliary n.

  • long ciliary
  • – sensory to (?)
  • short ciliary
  • – sensory to cornea
  • – suspends ciliary ganglion CN III
  • infratrochlear
  • – sensory to skin of bridge of nose
  • anterior ethmoidal
  • – sensory to nasal cavity, skin of nose
  • posterior ethmoidal
  • – sensory to nasal cavity
49
Q

What does CN V1 travel through?

A

trigeminal, ophthalmic

superior orbital fissure

supraorbital f.
- supraorbital n.

anterior ethmoidal f.
- anterior ethmoidal n.

posterior ethmoidal f.
- posterior ethmoidal n.

50
Q

What is the sensory ganglion of CN V1?

A

trigeminal, ophthalmic

trigeminal ganglion w/ trigeminal sensory nucl.

51
Q

What is the origin of CN V1?

A

trigeminal, ophthalmic

pons

52
Q

What are the branches of CN IV?

A

trochlear

trochlear n.
- motor: superior oblique

53
Q

What is the origin of CN IV?

A

trochlear

midbrain (contralateral)

54
Q

What is the motor nucl. of CN IV?

A

trochlear

trochlear nucl.

55
Q

What does CN IV travel through?

A

trochlear

superior orbital fissure

56
Q

What are the branches of CN III?

A

oculomotor

superior ramus
- motor: levator palpebrae superioris, superior rectus

inferior ramus

  • motor: inferior oblique, inferior rectus, medial rectus
  • parasymp: ciliary ganglion to ciliary bodies/muscles (lens, accommodation) and iris (constriction)
  • — suspended from short ciliary CN V1
57
Q

What does CN III travel through?

A

oculomotor

superior orbital fissure

58
Q

What is the motor nucl. of CN III?

A

oculomotor

oculomotor nucl.

59
Q

What is the parasympathetic nucl. of CN III?

A

oculomotor

accessory oculomotor nucl.

60
Q

What is the origin of CN III?

A

oculomotor

midbrain

61
Q

What are the branches of CN II?

A

optic

optic tract
optic chiasm
optic nerve
retina

62
Q

What is the origin of CN II?

A

optic

cerebrum

63
Q

What are the sensory nucl. of CN II?

A

optic

ganglion cells retina

64
Q

What does CN II travel through?

A

optic

optic canal

65
Q

What are CN II lesions?

A

optic

bitemporal hemianopsia: horizontal cut through optic chiasm (temporal field)

L/R homonymous hemianopsia: cut through optic tract (opposite of affected eye), temporal and nasal field effected

L/R monocular blindness: cut through optic nerve

66
Q

What are the branches of CN I?

A

olfactory

olfactory n.
- sensory: smell, olfactory mucosa of nose
olfactory bulb
olfactory tract

67
Q

What is the origin of CN I?

A

olfactory

cerebrum

68
Q

What is the sensory nucl. of CN I?

A

olfactory

nasal mucosa

69
Q

What does CN I travel through?

A

olfactory

cribriform foramina

70
Q

What are CN I lesions?

A

olfactory

anosmia: no smell, shearing of primary axons

71
Q

What is a CN III lesion?

A

oculomotor

M: ptosis (drooping eyelid)

P: no pupillary reflex; mydriasis (no accomodation)

72
Q

What is a CN IV lesion?

A

trochlear

diplopia

73
Q

What is a CN V1 lesion?

A

trigeminal, ophthalmic

no blink (corneal) reflex, facial hemianesthesia

74
Q

What is a CN V2 lesion?

A

trigeminal, maxillary

facial hemianesthesia

75
Q

What is a CN V3 lesion?

A

trigeminal, mandibular

BM: jaw weakness; ipsilateral deviation of opened jaw

S: facial hemianesthesia

76
Q

What is a CN VI lesion?

A

abducens

diplopia: medial drift eye

77
Q

What is a CN VII lesion?

A

facial

BM: bell’s palsy, stapedius = hyperacusis

P: loss of lacrimation, dry mouth

S: insignificant

S, taste: loss of taste in ipsilateral anterior tongue

78
Q

What is a CN IX lesion?

A

glossopharyngeal

BM: Slight dysphagia

P: Partial dry mouth

S: Anesthesia, loss of gag reflex

S, visceral: Loss of carotid sinus reflex (if bilat lesion)

S, taste: Loss of taste in posterior tongue ipsiltaerally

79
Q

What is a CN XI lesion?

A

accessory

weakness turning head toward opposite side and shrugging shoulders

80
Q

What is a CN XII lesion?

A

hypoglossal

ipsilateral deviation of protruding tongue

Clinical Anatomy 1 (44 decks)

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