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Canine Anatomy > CRANIAL NERVES (E3) > Flashcards

CRANIAL NERVES (E3) Flashcards

1
Q

Cranial Nerve I

A

Olfactory

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2
Q

Cranial Nerve II

A

Optic

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3
Q

Cranial Nerve III

A

Oculomotor

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4
Q

Cranial Nerve IV

A

Trochlear

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5
Q

Cranial Nerve V

A

Trigeminal

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6
Q

What are the 3 branches of Trigeminal N?

A
  1. Opthalmic
  2. Maxillary
  3. Mandibular
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7
Q

Cranial Nerve VI

A

Abducens

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8
Q

Cranial Nerve VII

A

Facial

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9
Q

Cranial Nerve VIII

A

Vestibulocochlear

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10
Q

Cranial Nerve IX

A

Glossopharyngeal

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11
Q

Cranial Nerve X

A

Vagus

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12
Q

Cranial Nerve XI

A

Spinal Accessory

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13
Q

Cranial Nerve XII

A

Hypoglossal

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14
Q

What is CN I sensory to?

A

olfactory epithelium

CN I = opthalmic

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15
Q

What is CN II sensory to?

A

vistion from retina

CN II = optic

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16
Q

What is CN III motor to?

A

D, V, M rectus muscles of the eye, ventral oblique, and levator palpebrae superioris.
Parasympathetic (autonomic motor) to the iris sphincter m.

CN III = oculomotor

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17
Q

What is CN IV motor to?

A

dorsal oblique m

CN IV = trochlear

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18
Q

Which is the only branch of trigeminal with moth sensory and motor?

A

mandibular br.

CN V = Trigeminal

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19
Q

What is the Opthalmic br. of CN V sensory to?

A

globe (including cornea), periorbita, nasal mucosa, and the medial aspect of palpebrae

CN V = Trigeminal

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20
Q

What is the Maxillary br. of CN V sensory to?

A

upper lip, nasal mucosa, lateral aspect of palpebrae

CN V = Trigeminal

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21
Q

What is the Mandibular br. of CN V sensory to?

A

lower jaw and auriculotemporal area

CN V = Trigeminal

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22
Q

What is the Mandibular br. of CN V motor to?

A

muscles of mastication

CN V = trigeminal

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23
Q

What is CN VI motor to?

A

retractor bulbi m, lateral rectus m

CN VI = Abducens

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24
Q

What is CN VII motor to?

A

muscles of facial expression, amd parasympathetic (autonomic motor) to the salivary and lacrimal glands

CN VII = Facial

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25
Q

What is CN VII sensory to?

A

taste from the rostral 2/3 of the tongue

CN VII = Facial

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26
Q

What is CN VIII sensory to?

A

hearing and balance

CN VIII = Vestibulocochlear

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27
Q

What is CN IX sensory to?

A

tongue and pharyngeal mucosa

CN IX = Glossophayngeal

28
Q

What is CN IX motor to?

A

pharynx and parasympathetic (autonomic motor) to parotid and mucosal glands

CN IX = Glossopharyngeal

29
Q

What is CN X motor to?

A

pharynx, esophagus, and parasympathetic (autonomic motor) to the thorax and abdomen

CN X = Vagus

30
Q

What is CN X sensory to?

A

ear canal, epiglottis, thorax, abdomen

31
Q

What is CN XI motor to?

A

trapezius, omotransversarius, sternocephalicus, cleidocephalicus, larynx, and recurrent laryngeal n.

CN XI = Spinal Accessory

32
Q

What is CN XII motor to?

A

extrinsic and intrinsic muscles of the tongue

33
Q

Olfactory N passes through ?

A

passes through foramina in the cribiform plate of the ethmoid bone

34
Q

Optic n passes through ?

A

optic canal

35
Q

Oculumotor n passes through ?

A

Orbital fissure

36
Q

Trochlear n passes through ?

A

Orbital fissure

37
Q

Opthalmic br of Trigeminal n passes through ?

A

Orbital fissure

38
Q

Maxillary br of Trigeminal n passes through ?

A

Rostral alar foramen via round foramen

39
Q

Mandibular br of Trigeminal n passes through ?

A

Oval foramen

40
Q

Abducens n passes through ?

A

Orbital fissure

41
Q

Facial n passes through ?

A

Stylomastoid foramen and interna, acoustic meatus

“If you’re smilin’, you’re stylin’”

42
Q

Vestibulocochlear n passes through ?

A

internal acoustic meatus

43
Q

Glossopharyngeal n passes through ?

A

Tympanooccipital fissure via the jugular foramen

44
Q

Vagus n passes through ?

A

Tympanooccipital fissure via jugular foramen

45
Q

Spinal Accessory n passes through ?

A

Tympanooccipital fissure via the jugular foramen

46
Q

Hypoglossal n passes through ?

A

Hypoglossal canal

47
Q

How to test for olfactory n?

A

cotton ball with alcohol, looking for a sniffing action

48
Q

How to test for optic n?

A

menace response (CN II sensory, CN VII motor), obstacle course, pupillary light reflex (CN II sensory, CN III motor)

49
Q

How to test for Oculomotor n?

A

look for tracking, strabismus if DVM rectus muscles affected, droopy eyelid if levator palpebrae superioris is affected, oblique deviation of eye if ventral oblique is affected, absence of miosis (pupillary contraction) when light shined in

50
Q

How to test for Trochelar n?

A

oblique deviation if dorsal oblique is affected

51
Q

How to test Opthalmic br of Trigeminal?

A

corneal reflex, palpebral reflex on medial canthus

52
Q

How to test Maxillary br of Trigeminal?

A

lateral canthus palpebral reflex
upper lip/nasal mucosa response

53
Q

How to test Mandibular br of Trigeminal?

A

lower lip/jaw (pinch and see response) to test sensory
atrophy of muscles of mastication
look for drop jaw

54
Q
A
55
Q

How to test for Abducens n?

A

corneal reflex - if no 3rd eyelid comes up then test the opthalmic br of trigeminal
medial strabismus if lateral rectus muscle innervation affected

56
Q

How to test for Facial n?

A

mainly testing motor- look for facial expression! eyebrows, ears, palpebrae, lips, etc.

57
Q

How to test for Vestibulocochlear n?

A

vestibular portion - balance, posture, etc. May see circling, head tilt, nistagmus…
cochlear portion - test hearing, make noise (out of sight)

58
Q

How to test for Glossopharyngeal n?

A

gag reflex - open the mouth and put finger toward back of the tongue, looking for a wretch
(gag reflex sensation of CN IX and motor of CN X)

59
Q

How to test for Vagus n?

A

listen to HR and gut sounds, will need to hear something very wrong like tachycardia (HR increase w lesion, gut sounds decrease w lesion)
test motor with gag reflex
often don’t test ear canal

60
Q

How to test for Spinal Accessory n?

A

look for atrophy to skeletal muscles that it innervates

61
Q

How to test for Hypoglossal n?

A

watch dog drink water or lick something, grab dog’s tongue and see if you can pull it out of the mouth

62
Q

What are the branches of the mandibular nerve (a br of Trigeminal)

A

inferior alveolar n, lingual n, auriculotemporal n

63
Q

What does the inferior alveolar n innervate?

A

mandibular teeth. also gives off mental nerves that exit the mental foramina

64
Q

What does the lingual nerve innervate?

A

base of the tongue (pain, touch, temperature from the rostral tongue)

65
Q

What does the auriculotemporal nerve innervate?

A

auricle and skin rostral to the auricle (sensation)

66
Q

Dysfunction of which 2 CN can lead to dysphagia? (difficulty swallowing)

A

CN IX, CN X

Canine Anatomy (22 decks)

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