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Oc Motility > Week 9 > Flashcards

Week 9 Flashcards

1
Q

Peripheral vestibular disorders are found where?

A

In the ear

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2
Q

Central vestibular disorders are found where?

A

In the brain

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3
Q

Rotational vertigo is found where?

A

SCC or central projection

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4
Q

Sensational vertigo of body tilt is found where?

A

Otolith system

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5
Q

An acute unilateral vestibular lesion affects what 2 things?

A

labyrinthe or vestibular nerve

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6
Q

What 2 types of nystagmus can an acute unilteral vestibular lesion cause?

A

Spontaneous or Head-shaking nystagmus

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7
Q

The head impulse test, test what?

A

Rotational VOR

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8
Q

The head heave test, test what?

A

Translational VOR

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9
Q

Static imbalances checks for what?

A

Gaze stability

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10
Q

How do we truly test static imbalance?

A

Remove fixation by using frenzel goggles or high plus lenses

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11
Q

Dynaimic imbalance checks for nystagmus by doing what test?

A

Doll’s eye testing

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12
Q

Positionally induced imbalance checks for nystagmus using what diagnositic maneuver?

A

When the patient is in the Dix-Hallpike Maneuver w/ head turned to 45 degrees to right or left

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13
Q

What’s the most common cause of dizziness (positionally induced imbalance)?

A

BBPV = Benign Paroxysmal Positional Vertigo

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14
Q

What is the treatment for positionally induced imbalance?

A

Epley Maneuver

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15
Q

What 3 other things can induce nystagmus?

A
  1. Sound
  2. Hyperventilation
  3. Valsalva
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16
Q

To do horizontal caloric testing, the patient is in supine position with head elevated ___ degrees?

A

30 degrees

17
Q

Warm water in caloric test causes what? In what direction

A

Causes exicitation

- fast pace is same direction as warm water was put in ear

18
Q

Cold water in caloric test cases what? What direction?

A

Causes inhibition

- fast pace is opposite direction as cold water was put in ear (COWS)

19
Q

To do vertical caloric testing, the patient is in supine position with head elevated ___ degrees?

A

60 degrees

20
Q

What issue is secondary to VOR?

A

Vertigo

21
Q

Alcohol gaze nystagmus (AGN) is due to what?

A

unequal alcohol concentration between the blood and endolymph

22
Q

Wallenberg’s syndrome is found due to a lesion or low brainstem stroke where?

A

in Mediulla

23
Q

A lesion in what part of the cerebellum can affect the medulla?

A

Vertebrobasilar circulation

24
Q

In a skew deviation, they hyper eye will be extorted or intorted?

A

Intorted

25
Q

Explain arnold chiari malformation.

A

Herniation of brainstem in foramen magnum

26
Q

What does arnold chiari cause?

A

Oscillopsia, dizziness, neck pain, headache

27
Q

What 2 findings can be found in ACM?

A
  1. Huge esotropia

2. Ataxia

28
Q

What 2 eye movements are spared in lesions of abducen’s nucleus?

A

Vertical and vergence eye movements

29
Q

The midbrain houses functions for what 3 things?

A
  1. Vertical Gaze
  2. Pupils
  3. Lids
30
Q

What is the key structure affected in DMS?

A

Posterior commissure

31
Q

What is the key finding for progressive supranuclear palsy?

A

Loss of convergence

32
Q

ALS affects what?

A

eye movements

33
Q

Thalamic heme causes what?

A

downward gaze palsy with ET

34
Q

Parkinson’s causes what?

A
  1. Hypometric saccades
  2. CI
  3. Lid lag
35
Q

Huntington’s Disease causes what?

A

Slow Saccades

36
Q

Hemispheric Stroke causes what?

A

Slow saccade and pursuit

37
Q

Parietal lobe lesion causes what?

A

loss of attention to target

38
Q

Frontal lobe lesion causes what?

A

impaired motor planning

39
Q

Ocular motor apraxia causes what?

A

Loss of initiation control

Oc Motility (10 decks)

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