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Flashcards in Anatomy of larynx Deck (57)
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1

What is the larynx basically?

Tube created by membranes, cartilages and muscles

2

How does the larynx relate to the hyoid bone?

It lies below the hyoid bone

3

Where does the larynx begin?

Laryngeal inlet

4

Where does the larynx end?

Lower border of cricoid cartilage

C6 vertebral level

5

What is the continuation of the larynx?

Trachea

6

How many important cartilages of the larynx are there? What are the different groups?

Three single cartilages

One paired cartilage

7

What are the three single cartilages of the larynx?

Thyroid cartilage

Cricoid cartilage

Epiglottis

8

What is the paired cartilage of the larynx?

Aretynoid cartilages

9

What are the parts of the thyroid cartilage?

Lateral plates

Laryngeal prominence

Inferior horn

10

What is the laryngeal prominence?

Where the two lateral plates of the thyroid cartilag meet in the anterior midline

11

What is the laryngeal prominence of the thyroid cartilage commonly known as?

Adam's apple

12

What is the inferior horn of the thyroid cartilage?

Postero-inferior projection

13

What does the inferior horn of the thyroid cartilage do?

Articulates with the cricoid cartilage

14

What is the signifiance of the inferior horn of the thyroid cartilage articulating with the cricoid cartilage in a synovial joint?

Thyroid cartilage can move on cricoid cartilage

15

What is different about the cricoid cartilage compared to other cartilages of the larynx and trachea?

Forms a complete ring
others are incomplete

16

What type of joint connects the inferior horn of the thyroid cartilage to the cricoid cartilage?

Synovial joint

17

What is the shape of the cricoid cartilage?

Wider and flatter at the back
than at the front

18

What shape is the epiglottis?

Leaf-shaped

19

What is the relative position of the aretynoid cartilages in the larynx?

Posteriorly

Superior to cricoid cartilage on either side

20

What do the aretynoid cartilages attach to?

The cricoid cartilage on either side

21

How do the aretynoid cartilages attach to the cricoid cartilage?

Synovial joints

22

What does the epiglottis attach to?

Postero-superior surface of thyroid cartilage inferiorly

Body of hyoid bone superiorly

23

How many membranes of the larynx are there?

Four

24

What are the membranes of the larynx?

Thyro-hyoid membrane

Crico-thyroid membrane

Crico-tracheal membrane

Quadrangular membrane

25

What does the thyro-hyoid membrane attach to?

Superiorly the hyoid bone

Inferiorly the thyroid cartilage

26

What does the crico-thyroid membrane attach to?

Superiorly the thyroid cartilage

Inferiorly the cricoid cartilage

27

What does the crico-tracheal membrane attach to?

Superiorly the cricoid cartilage

Inferiorly the first ring of cartilage of the trachea

28

What is the clinical signifiance of the cricothyroid membrane?

Cricothyroidotomy

29

When is a cricothyroidotomy done?

Patient cannot breathe
cannot be intubated or ventilated

30

How is a cricothyroidotomy done?

Palpate for the cricothyroid membrane
make an incision into it