Brainscape's Knowledge GenomeTM

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


See full index

FF3 Exam 1 > Vestibular System > Flashcards

Vestibular System Flashcards

1
Q

List and describe the 3 ear divisions

A
  • outer = capture sound waves
  • middle = convert waves to vibrations
  • inner = convert vibrations to nerve impulses
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which structure of the ear also aids in maintaining balance in space?

A

Inner ear

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

What is the specialized cell that aids in balance that contains nerve endings and mechanoreceptors?

A

Stereocilia

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

The outer and middle ear are innervated by which nerves?

A

Auricular and facial n

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

Describe Inner ear innervation

A

CN 8 - vestibulocochlear

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

Where is the internal ear located?

A

Petrous part of temporal bone

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

Which labyrinth contains perilymph?

A

Bony labyrinth

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

Endolymph is located in?

A

Membranous labyrinth

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

The cochlear duct has ___________ function and ___________ sound processing

A

Auditory; sensory

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

In the inner ear, which structure is associated with balance?

A

Semicircular duct

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

The semicircular duct lies in the ________________ of the bony labyrinth

A

Semicircular canal

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

How many semicircular canals in the bony labyrinth?

A

3

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

The __________ connects the cochlea to the semicircular canals

A

Vestibule

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

Define the cochlear

A

Spiral tunnel around axis of spongy bone called modiolus

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

The enlarged portion of the semicircular ducts is called the?

A

Ampulla

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

Within the ampulla is a specialized innervation called the _____________ that contain the hair cells?

A

Crista ampularis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The _________ and ___________ are housed in 2 depressions of the vestibule

A

Utricle and saccule

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the 3 semicircular canal pairs?

A
  • posterior
  • anterior/superior
  • horizontal/lateral
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Which semicircular canal is concerned with dynamic position of the head in 3 perpendicular planes??

A

Horizontal/lateral

20
Q

True or false: The lateral semicircular canal pair is sensitive to constant velocity rotation

A

False

21
Q

List the 2 otolith organs

A
  • utricle
  • saccule
22
Q

Linear acceleration and static position of the head are associated with which otolith organ?

A

Saccule

23
Q

Type 1 hair cells are characterized by ?

A

Narrow neck and rounded base

24
Q

Type II hair cells are _______________ in shape

A

Cylindrical

25
Q

Which type of hair cells are likely only inhibitory?

A

Type I

26
Q

True/False: Type 2 hair cells are innervated only by afferent fibers

A

False, they are innervated by both

27
Q

Where do afferent fibers direct their projections to?

A

CNS

28
Q

Where does bending need to occur to depolarize the cell (activate it)?

A

Towards kinocilium

29
Q

Bending away from the kinocilium will ____________ the cell

A

Hyperpolarize/inhibit

30
Q

What does the crista ampullaris contain?

A

Strereocilia (includes kinocilium), tip link, gelatinous cúpula, nerve supply

31
Q

What are adjacent stereocilia linked by?

A

Tip links

32
Q

Where do sensory hair cells project into ?

A

Gelatinous cupulla

33
Q

What is the function of the cúpula?

A

Allow for uniform movement of hair cells

34
Q

Cells in the macula are ___________ (flat/dome)

A

Flat

35
Q

Describe endolymph movement when the head is moving

A

Endolymph moves opposite to the direction of the head

36
Q

True/false: An increase in firing occurs toward the direction of the head

A

True

37
Q

Define nystagmus

A

involuntary eye movement to stabilize the image on the retina

38
Q

Describe rotational nystagmus

A

Eyes move slowly opposite to rotation and quickly in direction of movement

39
Q

Which nystagmus is accompanied by vertigo and muscle contractions, appropriate for virtual rotation?

A

Post-rotational (reversed movements to rotational)

40
Q

Describe the vestibulo-ocular reflex

A

Head turns left = output from left vestibular nucleus inhibits and excites right = eye moves right because of contraction and relaxation of muscles

*LR6
*DO4

41
Q

Where are kinocilium embedded?

A

Gelatinous cupula

42
Q

In the cupula, what is embedded that helps with hair cells movement?

A

Otoliths-Ca carbonate crystals

43
Q

What is the midline between utricle and saccule?

A

Striola

44
Q

Describe direction of stereocilia on each side of the striola

A

Opposite on either side of striola

45
Q

Describe orientation of macula of utricle

A

Horizontally

46
Q

Describe orientation of macula of saccule

A

Vertically

FF3 Exam 1 (18 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions