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Flashcards in VF anatomy Deck (32):
1

Name some primary biological functions of the VFs

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

2

Why do VF tissues change dynamically?

to adjust pitch and loudness of vocalizations

3

What kind of structure are the VFs?

LAYERED

4

VF epithelium

anchored to the remainder of fold

5

Which layer of the Lamina Propria vibrates a lot?

superficial

6

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

elastic fibers

7

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

collagenous fibers

8

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

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

9

VF is also made up of which muscle?

the TA

10

Cover of VF

epithelium and superficial layer of lamina propria

11

Transitional Zone of VF

intermediate and deep lamina propria

12

Body of VF

the muscle-TA

13

Differences between cover, transitional zones, and body

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

14

Medial Compression

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

15

Longitudinal Tension

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

16

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

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

17

Pitch changes MAY result from..

changes in length and tension of VFs

18

What happens when the VFs increase in length?

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

19

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

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

20

What is pitch?

relates to the frequency of VF vibration

21

Frequency

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

22

Describe the contraction of CT alone

stretches vocal ligaments and VF tissuedoes not significantly increase pitch

23

Describe TA contraction alone

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

24

What happens when these actions occur simultaneously?

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