Cranial nerve tests Flashcards

1
Q

CN I

A

Ophthalmic - identify smells

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2
Q

CN II

A

Optic - read Snellen chart, assess when finger is observed moving into the visual field

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3
Q

CN III

A

Oculomotor - Pupil shape = round, equal, and +2. Pupillary reflex with penlight, convergence and ability to follow H pattern

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4
Q

CN IV

A

Trochlear - Follow figure H with eyes

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5
Q

CN V

A

Trigeminal - sensations of pain, touch and temperature of the face. “can you feel this?”

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6
Q

CN VI

A

Abducents - Follow figure H with eyes

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7
Q

CN VII

A

Facial - Taste in first 2/3 of tongue, symmetry of face, close eyes, smile, frown, tearing function

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8
Q

CN VIII

A

Vestibulocochlear - Finger rub, Weber and Rinne, Romberg tests.

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9
Q

CN IX

A

Glossopharyngeal - taste posterior 1/3, gag reflex, position of uvula, speak or swallow

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10
Q

CN X

A

Vagus - speak or swallow

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11
Q

CN XI

A

Accessory - shoulder shrug, head rotation to resistance

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12
Q

CN XII

A

Hypoglossal - no deviation of tongue upon extension

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13
Q

Normal conduction of hearing

A

air conduction is longer than bone conduction

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14
Q

Weber’s test evaluates

A

sensorineural hearing and/or CN VIII damage

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15
Q

Rinne’s test evaluates

A

bone conduction vs air conduction

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16
Q

The vestibule provides

A

linear acceleration

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17
Q

the semmicircular canals provide

A

angular acceleration

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18
Q

the cochlea provides

A

sound

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19
Q

Barany’s test evaluates

A

nystagmus - fast component towards direction of angular acceleration

20
Q

blind spot calculation

A

C = 10(2)/

measured blind spot +3

21
Q

ficks

A

rate = change in concentrationxareatime/

distance * MW

22
Q

rate of diffusion for agar

A

distance/time

23
Q

how does solubility affect rate of diffusion

A

Increased solubility = increase rate of diffusion

24
Q

pupillary reflex

A

shine light into retina - CN II delivers sense to mesencephalon - CN III - constriction of pupils

25
Q

if you cut the optic nerve you will lose vision

A

in the side that was cut

26
Q

if you cut the optic tract you will lose vision

A

partially in both eyes

27
Q

If you have problems with the geniculocalcarine tract you will lose

A

partial vision in both eyes.

28
Q

a tumor or problem with the optic chiasm will result in

A

loss of vision in both eyes.

29
Q

myopia

A

elongated eyeball, focal point in front of retina, concave lens to correct

30
Q

hypermyopia

A

short eyeball, focal point behind retina, convex lens to correct

31
Q

damage to auditory pathways in CNS causes

A

partial hearing loss in BOTH ears

32
Q

the vestibulocochlear nerve enters the brainstem at the level of the

A

pons

33
Q

Patellar reflex

A

L4 - knee jerk stretch reflex;
absence or hypoactive = peripheral nerve damage or ventral horn disease
hyperactive = corticospinal tract lesions

34
Q

Achilles reflex

A

S1 = plantar flexion; absence = damage, sciatica, disc herniation, hypothyroidism, peripheral neuropathy

35
Q

Corneal reflex

A

CN 5, 7 = blink reflex and pupil dilation; absence indicates brain stem damage

36
Q

Gag reflex

A

CN 9 10 = contraction of back of throat

37
Q

ciliospinal reflex

A

dilate pupil in response to pain in the neck face and upper trunk, pupil dilates on side of pain. Horner’s syndrome

38
Q

Plantar reflex

A

babinski’s sign

39
Q

which nerves are involved in heart rate and blood pressure

A

IX - glossopharyngeal

X - vagus

40
Q

which nerves are involved in salivations

A

VII - facial

IX - glossopharyneal

41
Q

which nerves are involved in mastication

A

V - trigeminal

XII - hypoglossal

42
Q

which nerves are involved in swallowing

A

IX - glossopharyngeal
X - vagus
XI - accessory
XII - hypoglossal

43
Q

afterimage is tested by

A

by rubberband test

44
Q

adaption is tested by

A

weight on hand

45
Q

thermoreceptors tested by

A

hand in hot/cold water

46
Q

referred pain tested by

A

elbow in ice, pain in arm/shoulder