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Gross Anatomy 2 > Cranial Nerve Exam > Flashcards

Cranial Nerve Exam Flashcards

1
Q

What is the pathway for a reflex?

A

afferent nerve, spinal cord/brain stem, efferent nerve

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2
Q

What is the pathway for a response?

A

afferent nerve, cortex of the brain for perception, initiation of movement by cortex, efferent nerve

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3
Q

What is CN I?

A

Olfactory n.

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4
Q

How can you test CN I?

A

offer smelly treat without visualization

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5
Q

What is CN II?

A

Optic

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6
Q

T/F. the optic n. is both sensory and motor.

A

F. sensory only

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7
Q

What would happen if CN II is damaged

A

blindness

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8
Q

What are 5 tests used to test CN2?

A
  1. pupillary light reflex
  2. menace response
  3. visual placement reaction
  4. obstacle course
  5. tracking
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9
Q

What nerve do you also test when using PLR to test CN 2?

A

CN3

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10
Q

What two nerves do you test when testing a dogs menice response

A

CN 2 and 7

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11
Q

What if you see a normal menace response but PLR is negative?

A

Damage to CN 3

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12
Q

What is CN3?

A

Oculomotor

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13
Q

Which mm. of the eye are innervated by CN3?

A

Rectus m.
ventral oblique m.
pupil

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14
Q

Where does the oculomotor n. exit the skull?

A

orbital fissure

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15
Q

how can you test for CN3 damage?

A
  1. check for normal eye position
  2. check for normal uppereyelid position
  3. PLR
  4. lesions?
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16
Q

Static deviation of the affected eye

A

strabismus

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17
Q

drooping of the superior eyelid

A

ptosis

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18
Q

What is CN IV

A

Trochlear

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19
Q

Which m. does CN4 innervate?

A

dorsal oblique

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20
Q

Where does CN4 exit the skull?

A

Orbital fissure

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21
Q

How can you test CN4?

A
  1. abnormal rotation
  2. normal congruent eye movement
  3. strabismus
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22
Q

What are the 3 braches of CN5?

A
  1. ophthalmic
  2. maxillary
  3. mandibular
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23
Q

What is CN5?

A

Trigeminal

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24
Q

Which branch of the trigeminal n. is sensory to the lateral canthus?

A

maxillary

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25
Q

What branch of the trigeminal n. is sensory to the medial canthus?

A

ophthalmic

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26
Q

What is the afferent CN in the palpebral test?

A

trigeminal

27
Q

What is the efferent CN being tested when pinching the upper lip/cheak and observing the dog wrinkling its nose?

A

Facial

28
Q

What is CN6?

A

Abducens

29
Q

What two muscles are innervated by the abducens?

A

Lateral rectus

Retractor bulbi m.

30
Q

How can you test CN6?

A

look for normal eye movement and position

31
Q

If you touch the cornea and do not see the 3rd eyelid sweep over, which n is damaged?

A

CN6

32
Q

Which 3 nn. are responsible for producing coordinated movement of the eyes?

A
  1. CN3
  2. CN5
  3. CN6
33
Q

What is CN7?

A

Facial

34
Q

How does CN7 leave the dkull?

A

stylomastoid foramen

35
Q

T/F. CN7 is both sensary and motor?

A

t

36
Q

How can you test the facial n.?

A

facial symmetry

37
Q

What are 3 indicators of CN7 damage?

A
  1. dec. palpebral reflex
  2. dec. menace resp.
  3. dec. response to pinching of upper or lower lip
38
Q

How can you test the PSNS portion of the facial n.?

A

tear production amt.

39
Q

What is the PSNS of CN2?

A

salivary and lacrimal glands

40
Q

What is CN8?

A

Vestibulocochlear n.

41
Q

What n. functions in hearing and balance

A

cn8

42
Q

What would you see if CN8 is damaged?

A
  1. dec. hearing
  2. head tilt
  3. circling
  4. nystagmus
43
Q

A dog comes to you presenting with head tilt due to a lesion to CN8. is his head tilted toward or away from the lesion?

A

toward

44
Q

What is CN9?

A

Glossopharyngeal

45
Q

CN9 sensory to the ___

A

Tongue and pharyngeal mucosa

46
Q

CN9 motor to the ____

A

Pharynx

47
Q

CN9 PSNS to the ___

A

Salivary gland

48
Q

Where does CN9 exit the skull

A

Tympanooccipital fissure

49
Q

How can you test CN9?

A
  1. give treat

2. gag reflex

50
Q

What is CN 10?

A

Vagus

51
Q

Sensory of CN10?

A

epiglottis, ear canal, pharynx, larynx, trachea, esophagus

52
Q

PSNS of CN10?

A

Heart, lungs, abdominal viscera

53
Q

Motor of CN10?

A

Pharynx and esophagus

54
Q

how does CN10 exit the skull

A

Tympanooccipital fissure

55
Q

What is CN11

A

Accessory n.

56
Q

What mm. are innervated by CN11?

A

Sternocephalicus
cleidocephalicus
trapezius
Omotransversarius

57
Q

What n. branches off CN11

A

recurrent laryngeal n.

58
Q

What is the terminal branch of the recurrent laryngeal n.

A

Caudal laryngeal

59
Q

What is the only muscle that open the glottis?

A

Cricoarytenoidus dorsalis

60
Q

How does CN 11 exit the skull?

A

tympanooccipital fissure

61
Q

What would you observe if CN11 is damaged?

A
  1. gait change
  2. altered head and neck movement
  3. laryngeal paralysis (roarers)
62
Q

What is CN12?

A

Hypoglossal

63
Q

How does CN12 exit the skull?

A

hypoglossal canal

64
Q

What would you observe if CN12 was damaged?

A

Difficulty eating
tongue offset on unaffected side
dec tongue tone

Gross Anatomy 2 (27 decks)

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