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Flashcards in Vertigo Deck (44)
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1

vertigo

sense of movement and rotation of oneself or the surrounding environment

2

characteristics of peripheral vertigo (7)

episodic and short duration
autonomic symptoms present
precipitating factor
pallor, sweating
nausea and vomiting
auditory fullness (fullness w/in ears)
tinnits

3

characteristics of central vertigo

autonomic symptoms less severe
loss of consciousness can occur
neurological symptoms present

4

neurological symptoms present w/ central vertigo

diplopia
hemianopsia
weakness
numbness
ataxia
dysarthria

5

etiology of peripheral vertigo

BPPV
Meniere's disease
Infection
Trauma/Tumor
Metabolic disorders (Diabetes)
Acute alcohol intoxication

6

etiology of central vertigo

Meningitis
Migraine headache
Complications of neurologic origin post ear infections
Trauma/tumor
Cerebellar degeneration disorders (alcoholism)
Multiple Sclerosis

7

BPPV

comprised of repeated episodes of vertigo that occur subsequent to changes in head position

8

BPPV duration and location noted

only lasts a few seconds

first noted in recumbent position since most commonly affects the posterior semicircular canal

9

etiology of BPPV

usually otoconia (carnality) that loosens and travels into the posterior semicircular canal, causing vertigo

10

what is present w/ BPPV

vertigo and nystagmus

11

Treatment of BPPV

carnality repositioning maneuvers

12

Dix-Hallpike test purpose

determine if pt presents with BPPC

13

Dix- Hallpike procedure

1. pt in long sitting w/ head rotated 45 deg to one side
2. pt is rapidly moved into supine position w/ head still in 45deg rotation and extended 30 deg
3. therapist holds the pt's head in position for 20-30sec observing eyes for nystagmus

14

Congenital nystagmus

typically mild and does not change in severity over the person's lifetime

not associated w/ other pathology

15

spontaneous nystagmus casue

imbalance of vestibular signals to the oculomotor neurons

16

direction and speed of spontaneous nystagmus

constant drift in one direction that is countered by a quick movement in the opposite direction

17

when does spontaneous nystagmus occur?

after and acute vestibular lesion

18

how long will spontaneous nystagmus last?

about 24 hours

19

type of nystagmus w/ acute vestibular lesions

spontaneous nystagmus

20

peripheral nystagmus

occurs w/ peripheral vestibular lesion

21

is peripheral nystagmus inhibited?

yes w/ fixation of vision on an object

22

central nystagmus

occurs w/ central lesion of the brainstem/cerebellum

23

is central nystagmus inhibited?

no

24

positional nystagmus

induced by change in head position

25

what stimulates positional nystagmus?

semicircular canals

26

how long does positional nystagmus last?

typically only a few seconds

27

gaze-evoked nystagmus

occurs when eyes shift from primary position to alternate position

28

what is gaze-evoked nystagmus caused by?

pt's inability to maintain the stable gaze position

29

what is gaze-evoked nystagmus indicative of?

CNS pathology

30

what is gaze-evoked nystagmus associated with?

brain injury and multiple sclerosis