Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Neuroanatomy > Vestibular System > Flashcards

Vestibular System Flashcards

1
Q

The vestibular system informs the brain about ______________, _______ ___________, and _________ _________________.

A

motion, head position, and spatial orientation

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

Why is vestibular information important?

A

It is critical for regulating motor function, stabilizing gaze, head and posture.

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

What are the 2 otolith organs?

A

1.) utricle
2.) saccule

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

What detect linear accelerations of the head and static head position relative to the gravitational axis?

A

utricle and saccule (otolith organs)

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

What detect rotational accelerations of the head?

A

semicircular canals

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

otolith organs= ___________ accelerations

A

linear

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

semicircular canals= _______________ acceleration

A

rotational

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

The utricle is located _________________ and detects ________________ orientation.

A

horizontally ; horizontal

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

The saccule is oriented ___________________ and detects _______________orientation.

A

vertically; vertical

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

Both otolith organs make up the ___________.

A

macula

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

What are arrays of vestibular hair cells called?

A

macula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Hair cells are covered by the________________________ ________________ , a gelatinous matrix with ___________ on top.

A

otolithic membrane
crystals

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

What are the three sections of the semicircular canal?

A

1.) Superior
2.) Posterior
3.) Horizontal

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

Order of layers of the hair cell:

A

TOP
* calcium crystals
* gelatinous matrix (otolithic membrane)
* supporting cells
* nerve fiber
BOTTOM

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

What is the expansion of the canals that contain the cristae?

A

ampulla

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

What is an epithelium containing sensory hair cells called?

A

cristae

17
Q

On top of the hair cells there’s a gelatinous mass where the tips of the hair cells reside, called the ____________ .

A

cupula

18
Q

The semicircular canals are filled with ____________ (like the cochlea).

A

endolymph

19
Q

What is the largest CN sensory nucleus in the midbrain?

A

vestibular nucleus

20
Q

How many subdivisions is the vestibular nucleus divided into? Where are these mostly located?

A

4
medulla

21
Q

What are the subdivisions of the vestibular nucleus called?

A
  1. lateral vestibular nucleus
  2. superior vestibular nucleus
  3. medial vestibular nucleus
  4. inferior vestibular nucleus
22
Q

Bipolar cells from the vestibular ganglia stemming from the ________, _______________, and ________________________ innervate different regions of the brainstem.

A

utricle, the saccule, and the semicircular canals

23
Q

What are the parts of the vestibular cortex?

A
  1. Frontal eye fields
  2. 2v, 3a
  3. Posterior Parietal cortex 7, VIP, MIP, MST
  4. The parieto-insular-vestibular area (PIVC)
23
Q

Neurons from the vestibular nuclei extend efferents to:

BONUS: what are the reasons or impacts of those pathways?

A
  1. The spinal cord: equilibratory reflexes (posture)
  2. Trochlear (CN IV), abducens (CN VI), and oculomotor nuclei (CN III): vestibulo‐ocular reflex
  3. The cerebellum: balance and posture
  4. The thalamus and vestibular cortex
24
Q

What is the function of the frontal eye fields cortex?

A

Control eye movements and receive vestibular motion information

25
Q

What is the function of the 2v and 3a cortex?

A

Somatosensory areas that map body location and movement signals.

26
Q

What is the function of the Posterior Parietal cortex 7, VIP, MIP, MST cortex?

A

Involved with motion perception and responds to both visual and vestibular motion cues.

27
Q

What is the function of the PIVC?

A

Responds to body and head motion information

28
Q

What is the pathway of the vestibular system?

A

otolith -> gel matrix -> hair cells -> electrical signals -> vestibular nerves

29
Q

What is the diagnosis of someone having excess Ca rocks/crystals?

A

vertigo (will have stronger and more signals expressed)

Neuroanatomy (23 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions