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FF2 Exam 2 > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

CN I

A

Olfactory

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2
Q

CN II

A

Optic

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3
Q

CN III

A

Oculomotor

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4
Q

CN IV

A

Trochlear

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5
Q

CN V

A

Trigeminal

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6
Q

CNV1,2,3

A

V1: Ophthalmic
V2: Maxillary
V3: Mandibular

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7
Q

CN VI

A

Abducens

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8
Q

CN VII

A

Facial

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9
Q

CN VIII

A

Vestibulocochlear

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10
Q

CN IX

A

Glossopharyngeal

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11
Q

CN X

A

Vagus

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12
Q

CN XI

A

Accessory

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13
Q

CN XII

A

Hypoglossal

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14
Q

Which CN come directly off the forebrain?

A

I and II

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15
Q

Which CN come out through the orbital fissure?

A

CN III, IV, V1, and VI

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16
Q

CN II comes out through where?

A

Optic canal

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17
Q

Which CN comes out through the ethmoid bone (cribiform plate)?

A

CN I

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18
Q

Where does CN V2 come through?

A

Round foramen-Rostral alar foramen

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19
Q

Which CN comes out through the oval foramen?

A

CN V3

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20
Q

Where does the Facial and Vestíbulocochlear n exit out through?

A

Internal acoustic meatus

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21
Q

Which CN are involved in skeletal mm of the eyeball?

A

3, 4, 6, 12

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22
Q

Which CN is involved in constricting the pupil?

A

CN III

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23
Q

The skeletal muscles of the tongue are controlled by which CN through GSE fibers?

A

CN XII

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24
Q

Where does the optic nerve begin?

A

Optic disk

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25
Q

Where do the axons of the CN I synapse?

A

Neurons within olfactory bulbs

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26
Q

What binds odorant molecules?

A

Cilia of the dendrites in olfactory receptor cells

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27
Q

Which type of neurons are olfactory receptor cells?

A

Bipolar neurons

28
Q

Which test can be used to determine CN II function?

A

Menace response

29
Q

Which movement of the eye is primarily involved with the CN III?

A

Medial movement and pupillary constriction

30
Q

Where does the optic nerve begin?

A

Optic disk

31
Q

Where are the ganglion cells of CN II located?

A

Ganglion cell layer of retina

32
Q

Describe how CN II runs

A

Enters optic foramen, passes through optical canal and extends through thalamus

33
Q

What type of innervation is CN II?

A

Special somatic senses

34
Q

What type of innervation is CN I?

A

Chemical senses

35
Q

Through which innervation does CN III move the eye medially?

A

General somatic efferent

36
Q

Pupillary constriction through CN III is what type of innervation?

A

Parasympathetic (General Visceral Efferent)

37
Q

The dorsal oblique muscle is innervated by which CN?

A

CN IV - Trochlear

38
Q

Lateral deviation and retraction of globe of the eye is innervated by which CN ?

A

CN VI - Abducens (General somatic efferent)

39
Q

Parasympathetic GVE innervation of the CN III goes to the sphincter or dilator pupillae?

A

Sphincter pupillae

40
Q

Dilator pupillae muscle is innervated through CN III via what type of innervation?

A

Sympathetic and Post ganglionic

41
Q

If a dog has an unresponsive left pupil but normal menace responses bilaterally with slight ptosis in L eye and poor adduction, what is the diagnosis?

A

L Oculomotor N dysfunction with complete GVE (ANS) neural deficit and partial somatic deficit

42
Q

In development, a nerve is assigned to each ________________________

A

Pharyngeal arch

43
Q

The 1st pharyngeal arch is associated with what action and thus which nerve?

A

Mastication (CN V3)

44
Q

Facial expression/CN VII is associated with what pharyngeal arch?

A

2

45
Q

Which nerves are associated with pharyngeal arches 1-4?

A

Lingual (CNV3, CN VII, CN ΙΧ, CN XII)

46
Q

The larynx and CN X is associated with which arch?

A

Pharyngeal arch 6

47
Q

What are the 3 components of CN V?

A

1- ophthalmic
2- mandibular
3- maxillary

48
Q

Which CNV components are sensory strictly?

A

V1 and V2

49
Q

Which CN V has both sensory and motor components?

A

CN V3

50
Q

CN V1 innervates which areas?

A

Eyes/eyelids/scalp/forehead/horn

51
Q

The maxillary nerve goes through which fissure ?

A

Round foramen, alar canal, Rostral alar foramen

52
Q

Sensory innervation to nasal mucosa, upper teeth, gum, lip, nose is via the CN V__

A

2

53
Q

Which CN V division goes through oval foramen?

A

CN V3

54
Q

What is innervated sensory by the CN V3?

A

Ear/face/ cheek/ tongue/lower teeth/gum/lip (Buccal, Lingual, inf alveolar, Mental Rostral/caudal, auriculotemporal - BLIMA)

55
Q

The motor component of CN V3 innervates ?

A

The Muscles of mastication

56
Q

Describe paralysis of the Mandibular N

A

Temporalis/Masseter mm wasting, prominent zygomatic arch

57
Q

Which test is used to determine Facial Nerve function (along with CNV 1,2)

A

Palpebral reflex and Vibrissae response (touching upper lip)

58
Q

If there is injury to to one or more branches of CN VII, what is a possible clinical sign?

A

Neuropraxia

59
Q

The CN VIII leaves the petrous temporal bone via the _____________________.

A

Internal Acoustic Meatus

60
Q

The minor petrosal nerve is part of which CN?

A

IX

61
Q

Is the minor petrosal nerve parasympathetic and sympathetic?

A

Parasympathetic

62
Q

To which ganglion does the minor petrosal nerve carry PSNS fibers?

A

Otic ganglion

63
Q

true or false: CN X is sympathetic?

A

False, it is parasympathetic

64
Q

Define the pharyngeal reflex

A

gag reflex - throat contraction that happens when something touches the roof of the mouth, back of the tongue/throat or the areas around the tonsils

65
Q

Which nerve along with CN X innervates the larynx and pharynx?

A

CN XI - Accessory

66
Q

Which root of CN XI innervate trapezius and sternocephalicus muscle?

A

Spinal root
- dorsal : trapezius
- ventral : sternocephalicus

67
Q

The sole motor supply to the intrinsic and extrinsic muscles of the tongue is CN _____.

A

CN 12

FF2 Exam 2 (9 decks)

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