Brainscape's Knowledge GenomeTM

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


See full index

AUDE 5160 - Anatomy > Vestibular Part 1 > Flashcards

Vestibular Part 1 Flashcards

1
Q

List the central vestibular pathway

A

8VVCROSS
cn 8
Vestibular Nuclei Ipsilateral
Vestibular Nuclei contralateral
cerebellum (to and from)
reticular formation
Occular muscles via CN III, IV, VI
Spinal cord (LVST and MVST)
Superior Sylvian gyrus and SI areas

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

What 3 systems are involved in balance?

A

vision
somatosensory
vestibular
all 3 work together for us to keep our balance

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

what are the two external forces in vestib system

A

vision and somatosensory

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

What is the internal reference of vestib system

A

vestibular

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

what is the main role of the balance system?

A

to allow us to interact and maintain contact with our surroundings in a safe and efficient manner

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

what is ma de debarquement sysndrome (MdDS)

A

rare vestib disorder that makes you feel like you’re moving even when youre not. most common after travel, usually by boat

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

what part of the peripheral vestib system happens with acceleration and deceleration

A

vestibular

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

what part of the peripheral vestib system happens with standing still

A

somatosensory

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

series of interconnected canals and cavities located in the petrous poriton of the temporal bone

A

labyrinth

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

located medially and anteriorly in petrous apex

A

cochlea

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

located laterally and posteriorly in petrous apex

A

vestibular

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

how many sensory organs are there and where are they located

A

5 in each membranous labyrinth (10 total)
utricle and saccule macula
3 ampullae (cristae ampullaris)

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

what and where are the vestibular ganglion

A

scarpa’s ganglion (cell bodies)
located in internal auditory canal
two divisions (superior (LSU) and inferior vestib nerve (PS))

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

How many and what type of fibers are in vestib?

A

20,000
primarily bipolar afferent fibers

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

what is the name of the afferent fiber that branches off of the inferior vestib nerve of CN VIII and attaches to the cochlea

A

vestibulocochlear ramus

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

what is the accessory structure in the vestibular?

A

cupulla

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

The vestibular system is ________ (more / less) effective when the head or body is still and ________ (more / less) active when the body is in motion.

A

less (use vision more here)
more (vestib main function here)

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

Balance is dependent upon sensory information gathered from what three systems?

A

somatosensory/proprioception
vestibular
visual

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What are the two types of sensory structures in the vestibular system and what stimuli do they respond to?

A

crista ampullaris in SCC - angular acceleration - pitch, roll, yaw?
maculae in utricle and saccule (otolithic membrane)- linear acceleration and gravitational forces

20
Q

does kinocilium disappear after embryonic development in the vestibular system?

A

no, just in the cochlea

21
Q

why may we be able to regenerate hair cells and where?

A

in the vestibular system because the kinocilia is still present

22
Q

what are the type of hair cells in the vestib system?

A

Type 1 and type II

23
Q

which vestibular hair cell is flask shaped with a large nerve innervating directly by afferent fibers?

A

type I

24
Q

which vestibular hair cell is cylindrical and innervated directly by efferent fibers

A

type II

25
Q

what produces endolymph in vestibular system?

A

dark cells

26
Q

how are kinocilia oriented in the horizontal canal

A

toward the utricle

27
Q

how are the kinocilia oriented in the superior/posterior canals

A

away from the utricle

28
Q

What fluid movement causes excitation in horizontal canal?

A

fluid movement from the semicircular canal side and toward the utricle (hits smaller stereocilia first)

29
Q

what fluid movement causes inhibition in horizontal canal?

A

fluid movement from the utricle toward the canal (hits kinocilia first)

30
Q

what fluid movement causes excitation in ant/post canals?

A

fluid movement from the utricle toward the canal

31
Q

what fluid movement causes inhibition in ant/post canals?

A

fluid movement from the semicircular canals toward the utricle

32
Q

what are the otolithic structures

A

utricle and saccule

33
Q

what plays a large role in postural control and senses change in orientation in respect to gravity (moving forward in a car)

A

utricle

34
Q

what is in the otolithic membrane to give it density

A

otoconia

35
Q

what are embedded in the otolithic membrane

A

stereocilia and kinocilia

36
Q

what detects linear acceleration and gravitational forces

A

maculae (utricle - horizontal saccule - verticle)

37
Q

calcium carbonate crystals mixed with a protein matrix

A

otoconia

38
Q

small grain- or rice-shaped particles with a density that allows the utricle to respond transiently to linear acceleration and in a more practical fashion to head tilt

A

otoconia

39
Q

tilt head left =

A

inhibitory

40
Q

tilt head right =

A

excitatory

41
Q

imaginary line through axis of each maculae which hair cells are organized

A

striola

42
Q

axis for polarization allowing for complex stimulation patterns

A

striola

43
Q

this allows for a complex multidirectional pattern of responses

A

the alignment of hair cells around the striola

44
Q

kinocilia are ____ striola in utricle

A

toward

45
Q

kinocilia are ____ striola in saccule

A

away

46
Q

primarily registers vertical movement, like going up in an elevator

A

saccule

47
Q

how is the saccule connected to the utricle and semicircular canals?

A

vestibular aqueduct

AUDE 5160 - Anatomy (16 decks)

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