Brainscape's Knowledge GenomeTM

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


See full index

Neuro I | Test 3 > Auditory System (Tracts, Physiology) > Flashcards

Auditory System (Tracts, Physiology) Flashcards

1
Q

Steps of Hair cell depolarization

A
  1. Sound wave deflects the stereocilia TOWARDS kinocilium
  2. Causes influx of K+ from endolymph into the cell
  3. Influx of calcium
  4. Release of NT (glutamate) via vesicle fusion
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Inner hair cells

A

Primary source of auditory information

Type I afferent

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

Outer hair cells

A

Amplifier of auditory information

Type II afferent + efferent fibers

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

What part of the basilar membrane will respond to low frequency sounds?

What are the characteristics of the basilar membrane here?

A

Distal end, near helicotrema

Wide and flexible

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

What part of the basilar membrane will respond to high frequency sounds?

What are the characteristics of the basilar membrane here?

A

Beginning, near the oval window

Narrow and stiff

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

What ion channels are responisble for the depolarization of hair cells?

A

TRPA1 on stereocilia tips

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

Function of the stria vascularis

A

maintains the electrochemical properties of endolymph by pumping K+ into endolymph

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

What protein allows outer hair cells to contract?

A

Prestin

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

Where do hair cells receive afferent innervation and efferent innervation from?

A

Afferent: Spiral ganglia

Efferent: Superior olivary complex

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

Pathway of Auditory Processing

A

CNVIII

  1. Ventral Cochlear Nucleus / Dorsal Cochlear nucleus
  2. Medial Superior Olivary Complex/ Lateral Superior Olivary Complex
  3. Inferior Colliculus/ Superior Colliculus
  4. Brachium of IC
  5. Medial Geniculate Nucleus (Thalamus)
  6. Primary Auditory Complex
  7. Secondary Association Cortex
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Fxn of VCN

A

Nature of sound

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

Function of DCN

A

Location of sound

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

Function of Medial Superior Olivary Complex

A

Timing of sound

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

Fxn of Lateral Superior Olivary Complex

A

Intensity of sound

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

Fxn of Inferior colliculus

A

Spatial Map of Sound

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

Fxn of the Olivocochlear Efferents

A

Help focus on tone, prevent hair cell damage
Medial = innervate outer hair cells
Lateral = innervate inner hair cells

17
Q

What muscles are inhibited/activated with horizontal semicircular canals?

(Spinning)

A

Medial Rectus activated
Lateral rectus inhibited

(IL eye)

18
Q

What muscles are inhibited/activated with Posterior semicircular canals?

(Falling Backwards)

A

Superior Oblique activated
Inferior Oblique inhibited

(look down as you fall)

19
Q

What muscles are inhibited/activated with anterior semicircular canals?

(Falling forwards)

A

Superior Rectus activated
Inferior rectus inhibited

(look up as you fall)

20
Q

What supplies the inferior colliculus?

A

Quadrigeminal A. and Superior Cerebellar A

Neuro I | Test 3 (7 decks)

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