Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Head and Neck > Muscles of the larynx > Flashcards

Muscles of the larynx Flashcards

1
Q

Where are most of the intrinsic muscles of the larynx located?

A

Within the larynx

deep to the thyroid cartilage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the actions of the intrinsic muscles of the larynx?

A

Move the aretynoid cartilage on cricoid cartilage at the cricoaretynoid joint
moves the true vocal cords
changes the diameter of the rima glottidis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the innervations of most of the intrinsic muscles of the larynx?

A

Recurrent laryngeal nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does the recurrent laryngeal nerve branch off?

A

CN10 vagus nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How does the recurrent laryngeal nerve ascend up the neck?

A

In the tracheo-oesophageal groove

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a close anatomical relation of the recurrent laryngeal nerve?

A

Inferior thyroid artery

Aortic arch

Apex of lung

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does the recurrent laryngeal nerve innervate apart from the intrinsic muscles of the larynx?

A

Sensory innervation to infraglottis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are two important intrinsic laryngeal muscles?

A

Posterior cricoaretynoid muscle

Cricothyroid muscle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does the posterior cricoaretynoid muscle attach to?

A

Cricoid cartilage posteriorly

Aretynoid cartilage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the innervation of the posterior cricoaretynoid muscle?

A

Recurrent laryngeal nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the action of the posterior cricoaretynoid muscle?

A

Abducts vocal cords

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is special about the posterior cricoaretynoid muscle?

A

Only intrinsic muscle of the larynx that abducts the vocal cords

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What does the cricothyroid muscle attach to?

A

Cricoid cartilage anteriorly

Thyroid cartilage anteriorly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the innervation of the cricothyroid muscle?

A

Superior laryngeal nerve

external branch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the action of the cricothyroid muscle?

A

Bilateral contraction
tilts the thyroid cartilage anteriorly over the cricoid cartilage
increases tension of vocal cords
higher pitched sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is special about the cricothyroid muscle?

A

Only intrinsic muscle of larynx to be found outside of larynx

Only intrinsic muscle of larynx not innervated by the recurrent laryngeal nerve

17
Q

How does tension and length of true vocal cords affect pitch of vocal sounds?

A

Increased tension and length gives high pithced vocal sounds

Decreased tension and length gives low-pitched vocal sounds

18
Q

What does the superior laryngeal nerve branch off?

A

CN10 vagus nerve

19
Q

What are the branches of the superior laryngeal nerve itself?

A

External branch

Internal branch

20
Q

What is a close anatomical relation of the external branch of the superior laryngeal nerve?

A

Superior thyroid artery

21
Q

What does the internal brach of the superior laryngeal nerve innervate?

A

Sensory innervation to supraglottis

22
Q

What happens to the vocal cords during inspiration and expiration?

A

Abduct

23
Q

What happens to the rima glottidis when the vocal cords abduct?

A

Increased diameter

24
Q

What does the level of abduction of the true vocal cords during inspiration and expiration depend on?

A

How deep the breathing is

more abduction if deeper breathing

25
Q

What happens to the vocal cords during phonation?

A

Adduct

26
Q

What happens to the rima glottidis when the vocal cords adduct?

A

Decreased diameter

27
Q

Why are the vocal cords adducted during phonation?

A

Expired air forced through closely adducted vocal cords
vocal cords vibrate
gives pitch of voice

28
Q

What happens to the epiglottis when swallowing?

A

Aryepiglottic muscles contract

pull down epiglottis over the laryngeal inlet

29
Q

Why does the epiglottis cover the laryngeal inlet when swallowing?

A

To prevent aspiration

30
Q

What happens to the larynx itself during swallowing?

A

Pharyngeal muscles and suprahyoid muscles contract

pull larynx upwards and forwards

31
Q

What happens to the vocal cords during swallowing?

A

Adduct

32
Q

Why do the vocal cords adduct during swallowing?

A

To prevent aspiration

33
Q

What happens to the vocal cords during a cough?

A

Adducted for a while

then suddenly abduct

34
Q

What happens when the vocal cords are adducted during a cough?

A

Intrathoracic pressure builds up

35
Q

What happens when the vocal cords suddenly abduct during a cough?

A

Air is expired rapidly and forcefully

Head and Neck (54 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions