Larynx and Laryngopharynx Flashcards Preview

Hugh's MD1 Neuro > Larynx and Laryngopharynx > Flashcards

Flashcards in Larynx and Laryngopharynx Deck (32):
1

Describe the nerves that innervate the larynx

The superior laryngeal becomes the internal and external laryngeal to supply from above while the recurrent laryngeal supplies from below. 

They are all branches of the vagus

1

What is the clinical implication of the position of the laryngeal vessels?

The inferior thyroid vein sits on top of the trachea making inserting an emergency airway difficulty therefore the cricothyroid membrane should be used instead

1

Does fluid travel through the laryngopharynx in the same manner as food?

No, it travels lateral to the epiglottis, over the aryepiglottic folds as it isn't heavy enough to depress the epiglottis

2

Where is the origin of the epiglottis?

Posterior aspect of the angle of the thyroid cartilage 

2

What position must the vocal ligament be in for breathing to occur?

Abduction

2

Which muscles is important for adduction of the vocal folds?

Lateral cricoarytenoid

3

What happens the voice when the recurrent laryngeal nerve is damaged?

Hoarse voice and stridor

4

How does the epiglottis connect to the tongue?

It hangs off the back of the tongue

4

Describe the course of a food bolus during swallowing

The bolus passing through the oropharynx and pushes down the epiglottis > travels down the oesophagus

4

T/F Mechanical closure of the epiglottis is sufficient to seal the entrance to the larynx?

False, the thyroid cartilage also lifts

6

Does the arytenoid cartilage sit on the thyroid or cricoid cartilage?

Cricoid

8

What are the implications of the swivel of the arytenoid cartilage?

Allows movement of the vocal ligaments

10

What are the three major structures in the laryngeal skeleton?

The hyoid bone

The thyroid cartilage

Cricoid cartilage

11

What position must the vocal ligament be in to produce sound?

Adduction

11

Which muscles does the inferior laryngeal nerve supply?

All intrinsic muscles of the larynx except the cricothyroid

12

Which muscles move the vocal fold?

The intrinsic muscles of the larynx

14

In what order are the hyoid bone, cricoid cartilage and thyroid cartilage arranged from top to bottom?

Hyoid

Thyroid

Cricoid

15

Which nerve supplies sensory innervation to the mucosa of the larynx?

Internal laryngeal

17

What are the boarders of the larynx?

The epiglottis and the C6/the lower boarder of the cricoid cartilage

18

Why does the voice sound hoarse when the inferior laryngeal nerve is damaged?

Vocal ligaments can't fully adduct > therefore have to push more air across them > hoarse voice

18

Which nerve does motor innervation for the pharynx?

CNX

Except Stylopharyngeus (CNIX)

20

Which aspect is the thyroid cartilage open?

Posteriorly

22

What are the membranes that lie in the larngeal skeleton called?

Thyrohyoid membrane

Cricothyroid membrane

24

Which muscles is important for abduction of the vocal ligaments?

Posterior cricoarytenoid

25

What colour is the vocal fold?

White

26

Which structures must be traversed when attempting to intubate a patient?

The teeth > tongue > under the epiglottis > through the vocal ligaments 

27

What provides sensory innervation to the pharynx?

The glossopharyngeal nerve

28

What are the two folded ligaments in the larynx called?

The vestibular fold (false vocal cord)

The vocal fold (true vocal cord)

29

What are the major vessels around the larynx?

Superior laryngeal vessels and inferior thyroid vein

30

Upon what axis does the arytenoid cartilage move?

It swivels posteriorly

31

How is sound produced by the vocal ligaments?

Air is pushed over the vocal folds causing vibration > sound

32

What attaches to the muscular process of the arytenoid cartilage?

Muscles of the larynx