Station Disorder Flashcards Preview

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Flashcards in Station Disorder Deck (12)
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1
Q

what maintains balance

A

CNS - parietal insular vestibular cortex and cerebellum

inner ear - semicircular canals

eyes

proprioceptors

2
Q

explain station testing

A
narrow based stance 
stand with heels and toes together 
dr observes sway in eyes 
patient closes there eyes 
doctor observes direction of sway 
repeat test
3
Q

interpretation of test

A

sway eyes open that doesnt get worse with eyes closed - cerebellar problem

no sway when eyes open, sway same direction each attempt - fall toward side of faulty lateral SC DUCT

no sway eyes open, sway inconsistenly on each attempt - proprioceptive lesion DCML

4
Q

dizziness is a __

A

symptom

5
Q

what are causes of dizziness

A

CVD - arrhythmias, mitral valve prolapse, hypotension

Multiple sensory deficit - older patient with type 2 diabetes and cataracts

psychological problem - ill defined lightheadedness

mal de debarquement syndrome - land sickness

6
Q

vertigo is a ___

A

sign

7
Q

what are the terms used to describe vertigo

A

geotropic - room spins

egotropic vertigo - person spins

8
Q

common causes of vertigo

A

vestibular neuronitis - viral infection of vestibular n, vertigo without hearing loss

labyrnithitis - viral infection of cochlear and vestibular nerve, vertigo with hearing loss

menieres syndrome - long term SN loss, tinnitus, episodic vertigo, unilateral, 60 years old, males

head trauma - physcial disruption of receptors in ducts or otolithic organs

9
Q

labyrithitis is a problem inside the ___ when the labyrinth gets swollen and inflamed

A

inner ear

10
Q

labyrinthitis may cause what?

A

sudden vertigo - makes you feel like youre spinning - ego

hearing loss

tinnitus - constant ringing

11
Q

what are the two forms of benign positional postural vertigo

A

canalithiasis - otoliths free in canal causes vertigo - positional vertigo that fatigues

cupulolithiasis - otoliths are attached to cupula and deforms cupula - positional vertigo that does not fatigue

12
Q

explain cervicogenic vertigo

A

assymetric proprioception from neck leads to assymtry activity in vestibular nuclei, giving them impression that room or person is spinning