Vestibular System Flashcards

1
Q

The utricle senses ________ acceleration information.

A

Horizontal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The Saccule senses _________ acceleration information.

A

Vertical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the thing that contains hair cells in the christa ampullae of the semicircular canals called?

A

Cupula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the medial vestibulospinal tract involved in?

A
  • bilateral
  • cervical spinal cord for neck movements
  • coordinates head and eye movements to stabilize gaze
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the lateral vestibulospinal tract involved in?

A
  • Unilateral/ipsilateral

- goes to all levels of spinal cord for postural adjustments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the vestibulo-occular reflex modulated by?

A

-inhibitory efferents from cerebellar purkinje cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the vestibulo-occular reflex modulated by?

A

-inhibitory efferents from cerebellar purkinje cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

When does abnormal nystagmus occur?

A

-with lesions to the peripheral vestibular system (head trauma or temporal bone fractures)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is benign paroxysmal positional vertigo (BPPV) and what causes it?

A
  • pt experiences sudden intense vertigo with certain head/body positions or movements
  • caused by otoconia that break free from ultricle or saccule and become lodged in cupula

**80% cure by using epley maneuver

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is labyrinthitis?

A
  • virus or bacteria infect vestibula labyrinth or CN 8

- sudden intense vertigo, nausea, and/or nystagmus that lasts for days or a week

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the symptoms of Meniere’s disease?

A
  • sudden intense vertigo lasting minutes to hours
  • tinnitus
  • sense of pressure/fullness in ear
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What prescription drugs can cause ototoxicity (hearing loss, balance problems, nausea)

A
  • aminoglycosides

- Cisplatin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What prescription drugs can cause ototoxicity (hearing loss, balance problems, nausea)

A
  • aminoglycosides

- Cisplatin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does it mean if a patient can hear tones, but is having trouble hearing words at the same threshold?

A

-problems more centrally, perhaps in cortex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is one of the only things that causes a low frequency sensory-neural hearing loss?

A

Menier’s disease

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What toes tympanometry audiometric testing tell us?

A

-if there’s a problem with conductive hearing

17
Q

How do we screen most newborns for hearing loss?

A

Otoacoustic emissions test

18
Q

How do we screen most newborns for hearing loss?

A

Otoacoustic emissions test

19
Q

What is producing sound in the otoacoustic emissions test?

A

-masilar membrane, driven by outer hair cells

20
Q

Why is the otoacoustic emissions (OAE) test used in newborn hearing test, if it only tests outer hair cells?

A

Very few congenital hearing loss syndromes leave the outer hair cells normal.

21
Q

What does cytomegalovirus cause in children (CMV)?

A
  • hydrocephalus
  • periventricular calcifications
  • hearing loss
22
Q

What is a connexin 26 defect?

A
  • leads to cochlear development disorder (childhood hearing loss)
  • **no K+ in endolymph
  • cochlear implant can help
23
Q

What is a connexin 26 defect?

A
  • leads to cochlear development disorder (childhood hearing loss)
  • **no K+ in endolymph
  • cochlear implant can help
24
Q

What should patients with enlarged vestibular aqueduct syndrome avoid?

A
  • contact sports

* will lead to faster hearing loss

25
Q

What causes bilateral acoustic neuromas?

A

-Neurofibromatosis 2

26
Q

All babies with bacterial meningitis need to be screened for ________ for a year after the infection.

A

Hearing loss

*labyrinthitis ossificans

27
Q

Acoustic trauma causes tearing of the ___________.

A

membranous labyrinth