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NMSK I > CN Assessment- Lab > Flashcards

CN Assessment- Lab Flashcards

1
Q

How do you test CN I- olfactory?

A

Sense of smell each nostril
Patient’s eyes are closed/blindfolded
Use familiar scents

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2
Q

What is the functional component of CN I?

A

Vs- visceral sensory

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3
Q

What are abnormal findings when testing CN I?

A

Anosmia: can’t detect smells

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4
Q

What is the functional component of CN II- optic?

A

Vs- visceral sensory

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5
Q

Is CN II afferent or efferent when testing light pupillary reflex?

A

afferent- sensory

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6
Q

How do you test CN II?

A

Visual acuity test with Snelllen Eye Chart
Visual field (hemifields)

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7
Q

What are the abnormal findings when testing CN II?

A

Blindness
Visual field deficits (hemianopsia)

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8
Q

What are the functional components of CN III- oculomotor?

A

Sm- somatic motor
Vm- visceral motor

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9
Q

Is CN III afferent or efferent when testing light pupillary reflex?

A

efferent- motor

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10
Q

What are the functions of CN III?

A

pupillary light reflex
accommodation/convergence
innervates muscles of the eye

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11
Q

How do you test CN III?

A

Perform smooth pursuit (H- Test)
Convergence testing
Pupillary light reflex

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12
Q

Involving CN III and the pupillary light reflex, what should happen to the pupils?

A

constrict bilaterally

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13
Q

When testing CN III, you should observe the eyes for ?

A

Ptosis

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14
Q

What are possible abnormal findings when testing CN III?

A

Absence of pupillary constriction
Lateral strabismus
Ptosis

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15
Q

What is the functional component for CN IV-trochlear?

A

Sm- somatic motor

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16
Q

Which eye muscle is supplied by CN IV?

A

Superior oblique (depression)

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17
Q

How should you test CN IV?

A

H- test

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18
Q

What are abnormal findings for testing CN IV?

A

Diplopia or nystagmus

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19
Q

With the H-test, what will the patient possibly display if you go outside their visual range?

A

End range nystagmus, which could alter the results

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20
Q

With the H-test, which CNs are you testing simultaneously?

A

CN III
CN IV
CN VI

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21
Q

CN III muscles?

A

Superior Rectus (elevation)
Inferior Rectus (depression)
Medial Rectus (adduction)
Inferior Oblique (elevation)

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22
Q

CN VI muscle?

A

Lateral rectus (abducts)

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23
Q

CN V (Trigeminal) function?

A

facial/TMJ sensation
muscles of mastication

24
Q

3 divisions of CN V and their functional components?

A

V1- Opthalmic (Ss- somatic sensory)
V2- Maxillary (Ss- somatic sensory)
V3- Mandibular (Ss- somatic sensory/Sm- somatic motor)

25
Q

How do you test CN V?

A

Light touch to areas of face
Palpate masseter and temporalis muscle
Corneal reflex
Jaw Reflex

26
Q

What are abnormal findings for CN V?

A

Loss of facial sensations
Loss of corneal reflex ipsilaterally
Asymmetry of jaw movement or strength

27
Q

What is the functional component for CN VI (abducens)?

A

Sm-somatic motor

28
Q

How do you test for CN VI?

A

Smooth pursuit (H-test)

29
Q

Possible abnormalities with CN VI testing?

A

Medial Strabismus
Diplopia or nystagmus

30
Q

What are the 4 functional components of CN VII (facial)?

A

Sm
Vm
Ss
Vs

31
Q

What does CN VII control?

A

facial expression and facilitates eye closure

32
Q

CN VII is responsible for ______ and taste on ________ ____ of tongue

A

salivation
anterior 2/3

33
Q

How do you test for CN VII?

A

Observe facial symmetry/facial movements
Apply sweet, salty, or sour solutions to outer and lateral portions of tongue

34
Q

What are abnormal findings of CN VII?

A

Paralysis of facial muscles
Incorrect identification of solution/decreased taste

35
Q

Bell’s Palsy is a ______ ______ injury

A

Unilateral LMN

36
Q

Guillain Barre Syndrome is a _________ ______ injury

A

Bilateral LMN

37
Q

a CVA is a _______ ______ injury

A

Unilateral UMN

38
Q

What is the functional component for CN VIII- vestibulocochlear?

A

Vs- visceral sensory

39
Q

What is the function of CN VIII?

A

Vestibular division: head position and equilibrium
Cochlear: hearing

40
Q

How do you test CN VIII?

A

Vestibular: VOR testing
Cochlear: finger rub beside ear, Weber test, Rinne test

41
Q

Abnormal findings when testing CN VIII?

A

Vestibular: Vertigo, impaired balance, gaze instability, nystagmus
Cochlear: deafness, impaired hearing, tinnitus

42
Q

What is the functional component for CN IX-glossopharyngeal?

A

All 4 components

43
Q

What are the functions of CN IX?

A

Taste on posterior 1/3 of tongue
Salivation
swallowing (sensation for soft palate and pharynx)

44
Q

How do you test CN IX?

A

Apply sweet, salty and sour solutions to posterior tongue
Gag reflex

45
Q

What are possible abnormal findings of CN IX?

A

Incorrect identification of solution, loss of taste on posterior tongue

46
Q

What are the functional components for CN X, Vagus?

A

All 4 components

47
Q

What are the functions of CN X?

A

Phonation, swallowing, palatal pharynx control, gag reflex

48
Q

How do you test for CN X?

A

Listen to voice quality
Observe swallowing
Ask them to say “ah” and observe for elevation of soft palate and midline position of Uvala
Gag reflex

49
Q

Possible abnormal findings for CN X?

A

Dysphonia- hoarse
Dysphagia- difficult swallowing
Dysarthria- difficulty with word articulation
No palate elevation
Loss of gag reflex

50
Q

Functional component of CN XI?

A

Somatic motor

51
Q

What two muscles are innervated by CN XI- spinal accessory?

A

SCM
Trapezius

52
Q

How would you test CN XI?

A

Ask patient to shrug shoulders apply resistance
Examine muscle bulk, strength, and symmetry

53
Q

What are some abnormal findings for CN XI?

A

LMN signs (atrophy, fasciculations, weakness)

54
Q

What is the functional component for CN XII- Hypoglossal?

A

Sm- somatic motor

55
Q

How do you test CN XII?

A

Listen to patient articulation
Examine resting position of tongue
Ask patient to protrude and move tongue side to side

56
Q

What are some abnormal findings for CN XII?

A

Dysarthria
Atrophy or tongue fasciculations
Impaired movements

57
Q

What is the main function of CN XII?

A

Tongue movements

NMSK I (9 decks)

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