2.4 Flashcards

1
Q

What does the stapes do to produce fluid

A

Pushes oval window which produces fluid waves in endolymph of cochlea

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2
Q

What does the waves causes that the stapes produces

A

Push on the scala media and produce movement of a portion depending on frequency

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3
Q

What absorbs the vibration of the endolymph

A

Absorbed by the round window

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4
Q

What is the basilar membrane constructed as

A

As a tanotopic organ

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5
Q

True or false

Basilar membrane consist of hair cells

A

True

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6
Q

What does the temporal field respresent

A

Info coming from the medial side but showing through the lateral portion of the eye

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7
Q

What does the nasal field represent

A

Info coming from the lateral side but showing on the medial side of the eye

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8
Q

Which layer receives info coming from the thalamus

A

Layer 4

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9
Q

Which layer sends info out to the spinal cord

A

Layer 5

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10
Q

How is orientation set up for the visual cortex

A

By going across

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11
Q

Visual cortex has ocular dominance which allows what?

A

It means stuff coming back from the visual cortex is coming from the same field in different eyes

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12
Q

What is an example of ocular dominance

A

Info goes to the right nasal and left temporal field, and starts at the left visual cortex

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13
Q

What does binocular vision allow for

A

Depth perception

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14
Q

What are the two streams of the visual stream

A

Dorsal and ventral stream

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15
Q

What’s the characteristic of the dorsal stream and which lone does it go to

A

(Spatial vision) pathway goes to the parietal lobe

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16
Q

What’s the characteristic of the ventral field and which line does it go to

A

(Object recognition) pathway goes to the temporal lobe

17
Q

What does changes in pressure cause

A

Sound

18
Q

What is frequency related to

A

Pitch of noise

19
Q

What is amplitude related to

A

Loudness of noise

20
Q

What is location related to

A

Spatial origin of the nose

21
Q

What does collection and amplification system cause

A

Ossicles amplify force air vibration and push on the oval window

22
Q

What does the middle of the ear contain

A

Tympanic membrane

23
Q

True or false

Tympanic membrane vibrates with sound

A

True

24
Q

Is the basilar membrane thicker or thinner as you go towards the apex

A

Thicker

25
Q

Which basilar membrane cause a high pitch and low pitch

A

Thinner basilar membrane causes a high pitch

Thicker basilar membrane causes a lower pitch

26
Q

What does movement of the basilar membrane cause

A

Shearing force that bends the stereocilia of the hair cells

27
Q

What are the characteristic of the outer hair cells

A

They are efferent systems that act to filter specific frequencies which allow selective attention

28
Q

What’s the characteristic of inner hair cells

A

They are actual sensory receptors which project auditory nerves to the brain

29
Q

What happens when the stereocilia pushes against the kinocilium

A

It depolarizers and K+ ions go into the stereocilia

30
Q

What happens as the kinocilium pushes against the stereocilia

A

It hyperpolarizes and the channel remains closed

31
Q

What are two important pathways of ascending auditory pathways

A

Spinal ganglia and superior olivary nucleus

32
Q

What’s the function of the superior olivary nucleus

A

Coincidence detectors

33
Q

What’s the purpose of a narrow base of the basilar membrane

A

Tuned for high frequencies

34
Q

What is the function a wilder apex of the of the basilar membrane

A

Low frequencies

35
Q

True or false

The auditory system is not bilateral

A

False

36
Q

What are the three bones in the ear

A

Malleus, stapes, incus