Week 9 Flashcards
(39 cards)
Peripheral vestibular disorders are found where?
In the ear
Central vestibular disorders are found where?
In the brain
Rotational vertigo is found where?
SCC or central projection
Sensational vertigo of body tilt is found where?
Otolith system
An acute unilateral vestibular lesion affects what 2 things?
labyrinthe or vestibular nerve
What 2 types of nystagmus can an acute unilteral vestibular lesion cause?
Spontaneous or Head-shaking nystagmus
The head impulse test, test what?
Rotational VOR
The head heave test, test what?
Translational VOR
Static imbalances checks for what?
Gaze stability
How do we truly test static imbalance?
Remove fixation by using frenzel goggles or high plus lenses
Dynaimic imbalance checks for nystagmus by doing what test?
Doll’s eye testing
Positionally induced imbalance checks for nystagmus using what diagnositic maneuver?
When the patient is in the Dix-Hallpike Maneuver w/ head turned to 45 degrees to right or left
What’s the most common cause of dizziness (positionally induced imbalance)?
BBPV = Benign Paroxysmal Positional Vertigo
What is the treatment for positionally induced imbalance?
Epley Maneuver
What 3 other things can induce nystagmus?
- Sound
- Hyperventilation
- Valsalva
To do horizontal caloric testing, the patient is in supine position with head elevated ___ degrees?
30 degrees
Warm water in caloric test causes what? In what direction
Causes exicitation
- fast pace is same direction as warm water was put in ear
Cold water in caloric test cases what? What direction?
Causes inhibition
- fast pace is opposite direction as cold water was put in ear (COWS)
To do vertical caloric testing, the patient is in supine position with head elevated ___ degrees?
60 degrees
What issue is secondary to VOR?
Vertigo
Alcohol gaze nystagmus (AGN) is due to what?
unequal alcohol concentration between the blood and endolymph
Wallenberg’s syndrome is found due to a lesion or low brainstem stroke where?
in Mediulla
A lesion in what part of the cerebellum can affect the medulla?
Vertebrobasilar circulation
In a skew deviation, they hyper eye will be extorted or intorted?
Intorted
