Chapter 69 - Aerodigestive anatomy, embryology, radiology Flashcards Preview

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Flashcards in Chapter 69 - Aerodigestive anatomy, embryology, radiology Deck (19)
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1
Q

general function of extrinsic vs intrinsic laryngeal mm

A

Extrinsic: swallowing
Intrinsic: respiration, phonation

2
Q

Which layer allows vibratory properties of VC?

A

SLP (gelatinous matrix)

3
Q

in what order do the hyoid, thyroid cart and cricoid cart ossify?

A

None ossified at birth
hyoid (2) then thyroid cart (teens) then cricoid (20-30s)

Hyoid only one to eventually completely ossify

4
Q

what type of joint is the cricoarytenoid joint?

A

ball and socket

5
Q

which mm abducts the TVC?

A

posterior cricoarytenoid (only abductor)

6
Q

which intrinsic laryngeal mm has bilateral innervation?

A

interarytenoid

If RLN is cut, you can still see slight adduction of arytenoid cart due to contralateral innervation of the ipsilateral interarytenoid

7
Q

Which pharyngeal constrictors insert on the larynx?

A

Middle and inferior

Helps elevate larynx

8
Q

VC Adductors

A

Thyroarytenoid
Lat Cricoarytenoid
Interarytenoid

9
Q

Action of cricothyroid

A

Pivot thyroid cart anteriorly —> lengthen/tense VC —> higher pitch

10
Q

Significance of superior and inferior arcuate lines of larynx

A

Where squamous epithelium (overlies vibratory portion TVC) meets columnar respiratory epithelium

RRP occurs at these transition points

11
Q

Saccule

A

Extension of ventricle laterally and superiorlu (goes more superior than FVC laterally)

12
Q

Quadrangular membrane and conus elasticus

A

Q: epiglottis to FVC

C: TVC vocal ligament to superior cricoid cart

13
Q

Processes and function of arytenoid

A

Ball/Socket joint with cricoid (at base of arytenoid)
Rotate vertically and glide/tip anteromedially
Vocal process- vocal lig attach
Muscular process - intrinsic mm attach

14
Q

Nerve of Galen

A

Anastamosis between RLN and SLN

Allows some phonation via SLN

15
Q

Layers of VC

A

Strat Squa
SLP
Vocal ligament
Thyroarytenoid mm (vocalis)

16
Q

3rd branchial Arch larynx

A

IX
Greater cornu hyoid
Epiglottis

17
Q

4th Arch larynx

A
SLN
Thyroid cart
Cuneiform cart 
Cricopharygeus
Cricothyroid
18
Q

6th Arch larynx

A
RLN
Cricoid cart
Arytenoid cart
Corniculate cart
Intrinsic mm
19
Q

Cause of laryngeal cleft

A

Incomplete cleavage of laryngotracheal diverticulum from primitive esophagus …. esophagotracheal septum forms in cranial direction…stall leads to cleft

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