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_Anat./GIE #4 > Larynx > Flashcards

Flashcards in Larynx Deck (26)
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1
Q

Besides the hyoid bone, what items (cartilages) make up the framework of the larynx?

A
epiglottis
thyroid cartilage (major player)
cricoid cartilage (supporting role)
arytenoid cartilages (major star)
corniculate cartilages
cuneiform cartilages
2
Q

What stretches between the thyroid cartilage and hyoid bone?

A

thyrohyoid membrane

3
Q

What passes through an opening in the thyrohyoid membrane?

A

internal laryngeal nerve and superior laryngeal artery

4
Q

What stretches between cricoid and thyroid cartilages?

A

medial and lateral cricothyroid ligaments

5
Q

What stretches between the cricoid and tracheal ring?

A

cricotracheal ligament

6
Q

What stretches between the arytenoids and thyroid cartilages?

A

vocal ligament

7
Q

What forms the vocal ligament?

A

medial condensation of lateral cricothyroid ligament

8
Q

What stretches between thyroid cartilage and epiglottis, and between hyoid bone and epiglottis?

A

thyroepiglottic ligament

hyoepiglottic ligament

9
Q

What ligament is cut when doing an emergency cricoidotomy?

A

median cricoid ligament

10
Q

What is the purpose of laryngeal/lateral ventricles?

A

creates a “shelf” to catch mucus on its way up and out as you cough

11
Q

What is the synovial joint of the thyroid & cricoid?

A

between the inferior horn of thyroid cartilage and the lateral facet of the cricoid cartilage (cricothyroid joint)

12
Q

What cartilages support the vocal folds?

A

arytenoid cartilages

13
Q

What movements happen at the synovial joint of the arytenoid cartilage and cricoid cartilage?

A

tilt, slide (adduct and abduct vocal folds)

14
Q

What muscles do the abduction and adduction of the vocal folds? (apposition - full closure)

A

abduction: posterior cricoarytenoids
adduction: lateral cricoarytenoids

15
Q

What happens when the transverse arytenoid muscles contract?

A

approximation - not quite closed

16
Q

What muscle is innervated by the external branch of the vagus?

A

cricothyroid muscle

17
Q

Tension on the vocal cords produces higher or lower frequency?

A

higher frequency

18
Q

Sensory innervation of the larynx:
above the vocal folds =
below vocal folds =

A

sensory above the vocal folds = superior laryngeal nerve

sensory below the vocal folds = recurrent laryngeal nerve

19
Q

Motor innervation of the larynx:

all _________ except _______ muscle which is innervated by __________

A

motor innervation of the larynx is all recurrent laryngeal nerve except cricothyroid muscle which is innervated by the external laryngeal nerve

20
Q

What is the relationship between inferior laryngeal nerve and recurrent laryngeal nerve?

A

the inferior laryngeal nerve is the terminal part of the recurrent laryngeal nerve

21
Q

What is the arterial supply of the larynx?

A

superior thyroid artery

inferior thyroid artery

22
Q

What can happen to the voice if a patient has an aortic aneurysm?

A

since the left recurrent laryngeal nerve wraps around the aorta, bulging/swelling of the aorta can stretch/damage the nerve, causing change in voice

23
Q

What is the venous drainage of the larynx?

A

lingual vein
superior thyroid vein
inferior thyroid vein

24
Q

Does the entire larynx have the same lymphatic drainage?

A

No - there is a great divide at the vocal folds and there is different drainage superior and inferior

25
Q

The lateral cricoarytenoid muscles _____ the vocal ligaments.

A

The lateral cricoarytenoid muscles adduct the vocal ligaments.

26
Q

The posterior cricoarytenoid muscles _____ the vocal ligaments.

A

The posterior cricoarytenoid muscles abduct the vocal ligaments.