Lecture 30 - Larynx & Phonation Flashcards Preview

Viscera & Visceral Systems > Lecture 30 - Larynx & Phonation > Flashcards

Flashcards in Lecture 30 - Larynx & Phonation Deck (34):
1

The larynx starts at the upper border of the ___

epiglottis

2

The larynx ends at the lower border of the ___

Lower border of cricoid cartilage

3

The laryngeal skeleton is formed by

a system of cartilages

At the top end is the hyoid bone

Down from that is the Thyroid cartilage (angl of which is the adams apple)

The next cartilge lump down in the cricoid cartilage

4

The thyroid cartilage has an _____ horn and.

superior and inferior horn

5

What on the thyroid cartilage articultes with the cricoid cartilage?

inferior horn

6

Thyroid cartialge is ______ posteriorly

deficient - for communication via the laryngeal inlet

7

The Cricooid cartilgate forms articulation for two oter cartilages called?

Arytenoid cartilages

Pyramidaly shaped

sit on the posterolateral aspect

8

What is the main movement of the Arytenoid cartilages?

Swivel movement - on an axis straight down through the triangle

contraction of muscle in one direction will swivel n the opposite direction

9

Arytenoid cartilages can also slide towards ___ _____

Arytenoid cartilages can also slide towards each other

10

where is the Thyrohyoid membrane

Between the Hyoid bone and thyroid cartilage

11

Epiglottic cartilage is attached to the ____ aspect of the thyroid cartilage and project up behind the ___bone.

What is its function?

Epiglottic cartilage is attached to the posterior aspect of the thyroid cartilage and project up behind the hyoid bone.

protect the inlet

12

Where are the vocal ligaments attached?

posteriorly: To the vocal process of arytenoid cartilage

Anteriorly:angle of thyroid (just below epiglottic cartilage)

13

the vaocal ligaemnts vibreate against each other to produce...

sounds

14

Where is the quadrangular membrane?

Between the Epiglottic cartilage and Arytenoid cartilage

15

What is the free superior edge of the quadrangular membrane called?

aryepiglottic ligament

16

What is the free inferior edge of the quadrangular membrane called?

Vestibular ligament - quite thick

So thickening at the top and bottom

17

The mucosa follows what course

membranes and ligaments - over the pharynx, hooks over the Aryepiglottic - goes arond Quadrangular membrane, under the vestibular ligament

18

The Vocal fold is referred to as the...

True vocal cord

19

Why is the vestibular fold referred to as the flase vocal cord?

The first ones you see looking down- but doesn't produce sound, more to do with protection of the true vocal cord

20

Vocal ligaments need to _____ for phonation and _______for breathing

Vocal ligaments need to adducted for phonation and abducted for breathing

21

What do the intrinsisc muscles of the larynx do?

alter the position of vocal ligaments

22

Which intrinsuc muscle allows abduction

posterior Cricoarytenoid - pulls muslce processes together, because of the swivel, the vocal ligaments will abduct

23

What does the Transverse and oblique arytenoidsmuscle do?

opposite to posterior CA

pulls muscle processes away form each other, therefore swivel the vocal pocesses towards each other - adduction (producing sound)

24

What msucle, which lies near the epiglottis, brings the arytenoid cartilages together

Transverse and oblique arytenoids

25

Which muslces produce aduction of the vocal ligaments

Transverse and oblique arytenoids

Transverse and oblique arytenoids

26

Vocalis and Thyroarytenoid do what when they contract?

Will pull the thyroid closer to the arytenoid, therefore make the vocal ligament more lax - lower frequency sounds

27

Which muscle helps produce high pitch sounds?

Cricothyroid - attached to front of cricocartliage and back of lamino of thyroid cartilage

contraction pulls the whole thyroid cartilage forward - stretches the ligaments - high pitch

28

Recurrent laryngeal supplies all of the muscles of the larynx except...

Cricothyroid - which is done by External larygeal (branch of superior laryngeal)

29

What does the sensory mucosa supply?

internal larygeal (another branch of the superior laryngeal)

30

A hoarse voice, caused by incomplete adduction is caused by damamge of what nerve?

Recurrent laryngeal - hoarse voice and stridor (effort in talking)

31

Where is the blood supply most significant to the larynx?

The thyroid gland sits directly lateral to the trachea, small part is anterior to it.

Therefore - the area below the thyroid gland is very vascular

32

What does superior blood supply?

superior thyroid vessels

inferior branches from below

33

Where is the best position to put an emergency airway?

cut through the cricothyroid membrane

34

Consider the path of intubation tube for artificial ventilation

.