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Flashcards in laryngeal anatomy Deck (32):
1

Structure of Laryngeal System

inter-related series of muscles, ligaments, cartilages, joints, and 1 bone (hyoid bone)

2

Primary Biological Function

to rapidly and securely protect airflow into trachea

3

Secondary Biological Function

vocalization and sound source production center

4

Unpaired Cartilages

thyroid, epiglottis, and cricoid

5

Paired Cartilages

corniculate, arytenoids, cuneform

6

Hyoid Bone

U-shaped bone suspended in upper neckforms upper framework of laryngeal system

7

How many wings does the thyroid cartilage have?

2 wings, including upper and lower horns

8

In which direction does the thyroid open?

posteriorly

9

Which other cartilage does the thyroid articulate with?

the cricoid cartilage

10

What's the name of the joint that is formed by the cricoid and thyroid cartilages?

the cricothyroid joint, which is a synovial/diarthrodial joint

11

Interactions between the Thyroid and Cricoid..

-joint allows thyroid to "rock over" the cricoid-can change vocal fold length by 25%

12

What kind of facets does the cricoid cartilage have for the arytenoids?

2 convex facets

13

Arytenoid Cartilage

2 small arytenoid cartilages artic with the cricoid cartilage

14

Arytenoid Processes

-vocal process (VFs connect here)-muscular process-apex/extension of arytenoid cart.

15

Where is the arytenoids articular facet located?

on the inferior surface of the muscular processmeets with the convex articular facet on the cricoid

16

Interactions between cricoid and arytenoid

-rocking motion of the arytenoid on the cricoid-synovial saddle joints

17

Which 3 ligaments affect joint motion of the arytenoid?

posterior cricoarytenoid ligament, lateral cricoarytenoid ligament, and the vocal ligament

18

abduction

when vocal folds move apart from eachother (when they OPEN)

19

adduction

when vocal folds come together (when they CLOSE)

20

arytenoid connection is very important to..

open and close the VFs

21

when the arytenoid rock forward, this causes

adduction, the vocal folds come together and close

22

cricothroid joint allows the thyroid to..

rock up

23

What shape is the epiglottis cartilage?

leaf-shaped

24

Thryoepiglottic ligament

to deep surface of the angle of the thyroid cartilage (below the notch)

25

Hyoepiglottic ligament

anterior surface of epiglottis attached the the body of the hyoid bone v

26

Function of the Epiglottis

shuts off airway to trachea when we swallow

27

Corniculate cartilages location

-sit on top of the apex of the arytenoid cartilages

28

Cuneiform cartilage location

-embedded within the aryepiglottic folds-these are the folds that form the entrance to the larynx

29

Corniculate composition

elastic cartilage

30

Corniculate function

no funtion for vocalization or speech production in humans

31

Cuneform composition

elastic cartilage

32

Cuneform function

possibly stiffen aryepiglottic folds to maintain the opening of the larynx