VF anatomy Flashcards

1
Q

Name some primary biological functions of the VFs

A

regulate airflow in and out of respiratory tractprotective-close when we swallowspecies-specific vocalizations

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2
Q

Why do VF tissues change dynamically?

A

to adjust pitch and loudness of vocalizations

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3
Q

What kind of structure are the VFs?

A

LAYERED

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4
Q

VF epithelium

A

anchored to the remainder of fold

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5
Q

Which layer of the Lamina Propria vibrates a lot?

A

superficial

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6
Q

What kind of fibers is the superficial layer of the Lamina Propria made of mostly?

A

elastic fibers

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7
Q

What kind of fibers is the deep layer of the Lamina Propria made of?

A

collagenous fibers

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8
Q

What kind of fibers is the intermediate layer of the Lamina Propria made of?

A

elastic, BUT is less flexible and more dense than the superficial layer

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9
Q

VF is also made up of which muscle?

A

the TA

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10
Q

Cover of VF

A

epithelium and superficial layer of lamina propria

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11
Q

Transitional Zone of VF

A

intermediate and deep lamina propria

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12
Q

Body of VF

A

the muscle-TA

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13
Q

Differences between cover, transitional zones, and body

A

cover and transitional zones are passively regulated while the body can be actively regulated

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14
Q

Medial Compression

A

forces that act to approximate the VFs at midline-combo of LCA and IA to rotate the arytenoid cartilages

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15
Q

Longitudinal Tension

A

-stretching forces applied to VF tissue-use of CT, TA, and extrinsic mm’s

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16
Q

What is the relationship between compression forces and the phonatory threshold?

A

higher compression forces translate into a higher phonatory threshold for vibration initiation-more compression, higher phonatory threshold

17
Q

Pitch changes MAY result from..

A

changes in length and tension of VFs

18
Q

What happens when the VFs increase in length?

A

increase in length of the overall VF by itself decreases thickness of VF which can function to elevate pitch if operating alone

19
Q

Increase in TENSION is more important for pitch elevation. Tension increases dramatically because..

A

changes in eleastic nature of VF tissue when it is lengthened due to antagonistic contraction of TA and CT

20
Q

What is pitch?

A

relates to the frequency of VF vibration

21
Q

Frequency

A

is an objective measure of a physical phenomenon-rate at which an object vibrates and is measure in Hz

22
Q

Describe the contraction of CT alone

A

stretches vocal ligaments and VF tissuedoes not significantly increase pitch

23
Q

Describe TA contraction alone

A

only acts to shorten the VFs and decrease the distance between the thyroid and arytenoid

24
Q

What happens when these actions occur simultaneously?

A

effective longitudinal tension builds

25
Why does PCA activity increase slightly during pitch shifts?
may function to prevent a forward movement of the arytenoid cartilage when the CT contract and pulls TA thinnermay act to anchor the arytenoid from the strain of tension also
26
What happens when these actions occur simultaneously?
effective longitudinal tension builds
27
Why does PCA activity increase slightly during pitch shifts?
may function to prevent a forward movement of the arytenoid cartilage when the CT contract and pulls TA thinnermay act to anchor the arytenoid from the strain of tension also
28
Name some primary biological functions of the VFs
regulate airflow in and out of respiratory tractprotective-close when we swallowspecies-specific vocalizations
29
Pitch lowering is primarily achieved by what?
changes in TA activity
30
How does the TA lower pitch?
-reduction in distance between thyroid and arytenoids-vocal ligament becomes relaxed as a consequence
31
In general, intensity is regulated by..
the degree of medial compression in the glottis and greater respiratory drive
32
What does more medial compression result in?
greater levels of resistance to air flow, thus producing an increase in Psg