Brainscape's Knowledge GenomeTM

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


See full index

COM - Neuro Test 2 > Special Senses Hearing And Vestibular - 4/11 Karius > Flashcards

Special Senses Hearing And Vestibular - 4/11 Karius Flashcards

1
Q

Fx of middle ear?

A

Impedance matching

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

Fx of inner ear?

A

Cochlea converts sound waves to APs (neural mechanism)

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

What is the fluid in the Scala vestibule and tympani?

A

Perilymph

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

Properties of Perilymph?

A

Similar to ECF

High Na, low K

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

Endolymph composition?

Located where?

A

High K, low Na

Scala media

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

How does the basilar membrane move during compression w/ the stapes?

During Rarefaction?

A

Down

Up

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

High frequency sounds have what kind of wavelength?

Pitch?

A

Low

High

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

At low frequency where does the maximum vibration of the basilar membrane occur?

A

Near the helicotrema

Furthest away from oval window

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

Hair cells are composed of what?

They are connected to each other by what protein filament?

A

Stereocilia

Tip link

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

What is the single true cilium called?

A

Kinocilium, it is tall

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

What happens if the cilia bend TOWARD the kinocilium?

AWAY?

A

Depolarization

Hyperpolarize

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

Bending hair cells towards the kinocilium opens what?

A

potassium channels that depolarize the cell

Potassium moves into cell

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

The hearing pathway splits into 2 parallel paths in the cochlear nucleus, where does the ventral path process?

Dorsal?

A

Temporal and spectral features of the sound (timing and pitch)

Integrates acoustic info w/somatosensory info for localizing the sound

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

What does the medial superior olive generate?

Mostly related to which pathway?

A

Intramural time differences

Dorsal

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

What does the lateral superior olive generate?

A

Map of intral-aural INTENSITY differences

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

What does the inferior colliculus do?

A

Suppresses info related to echoes and arrives at a final estimation of the sound on the horizon

17
Q

What does the superior colliculus do with the location data from the inf colliculus?

A

Adds 3rd dimension (vertically) to create spatial map

18
Q

In the primary auditory cortex (A1), what is activated by low frequency sounds?

High frequency?

A

Rostral

Caudal

19
Q

The association cortex is activated by what?

A

Has more neurons and is activated by complex sounds

20
Q

Fx of outer ear?

A

Funnel sound waves into ear

21
Q

What does angular acceleration require?

A

Rotation around 1 or more planes

22
Q

What is the utricle best situated to detect?

A

Linear motion occurring on the horizontal plane

Ex. Walking

23
Q

What is the saccule best position for?

A

Vertical acceleration

24
Q

Turning motion is best detected by what?

A

Horizontal/lateral canals

25
Q

Falling or being thrown backwards maximally activates what?

A

Posterior semicircular canal

26
Q

Falling forward activates what?

A

Anterior semicircular canal

27
Q

In the semicircular canals, what is used to detect sound?

A

Ampulla

28
Q

What is used in the utricle and saccule to detect sound?

What other organ is here?

A

Macula

Otolith organ

29
Q

If you are falling forward what is activated?

What muscle is activated?
Inhibited?

How do your eyes move?

A

Anterior semicircular canal

Superior rectus m. Activated
Inferior rectus m. Inhibited

EYES move UP

30
Q

If you are falling backward what is activated?

What muscle is activated?
Inhibited?

How do your eyes move?

A

Posterior semicircular canal

Superior oblique active
Inferior oblique inhibited

EYES move DOWN

31
Q

If you are spinning to the RIGHT what is activated?

Ipsilateral eye: What muscle is activated?
Inhibited?

Contralateral eye?

How do your eyes move?

A

Horizontal (lateral) semicircular canal

Medial rectus activated
Lateral rectus inhibited

Lateral rectus activated
Medial rectus inhibited

Eyes move LEFT

32
Q

Fx of the cortex/cerebellar involvement in the vestibulooptic reflex?

A

Suppress the reflex to allow for voluntary motion

COM - Neuro Test 2 (11 decks)

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