Larynx: Cartilage, Ligaments, Membranes Flashcards Preview

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Flashcards in Larynx: Cartilage, Ligaments, Membranes Deck (53):
1

Biologic Functions of the Larynx:
1.
2.
3.

1. Prevent air from escaping
2. Prevent objects from entering airway
3. Expel threatening objects from larynx and airway

2

Non-Biologic Function of the Larynx:
1.

1. Sound generator

3

Hyoid Bone Landmarks:
1.
2.
3.

1. Body/Corpus
2. Greater Cornua
3. Lesser Cornua

4

Hyoid Bone Shape:

Letter "U" shaped floating structure

5

Hyoid bone moves ____1____, which causes _____2_____ and is important for ____3____.

1. up and down
2. changes to voice quality
3. safe swallowing.

6

Hyoid bone is point of attachment for ___________.

At least 6 muscles

7

Thyroid Cartilage Landmarks:
1.
2.
3.
4.
5.
6.

1. Superior Cornua
2. Inferior Cornua
3. Oblique Line
4. Thyroid Angle- where left and right lamina meet
5. Lamina- large sections of thyroid cartilage
6. Thyroid Notch- dip between two lamina, above thyroid angle

8

Thyroid Cartilage Shape:

Shield-Like, largest cartilage in Larynx

9

Cricoid Cartilage Landmarks:
1.
2.
3.
4.

1. Anterior Arch- curved front portion
2. Lamina- two"plate-like" sides
3. Facets- four places of attachment, 2 on superior surface for arytenoids and 2 on lateral surface for thyroid
4. Posterior Quadrate Lamina

10

Cricoid Cartilage Shape:

Signet shaped "class ring"

11

Cricoid Cartilage Location:

Most inferior cartilage of larynx, below thyroid cartilage and superior to trachea

12

Arytenoid Cartilage Landmarks:
1.
2.
3.
4.

1. Apex
2. Base
3. Processes- two muscular and two vocal processes
4. Three surfaces, pyramid-shaped

13

Arytenoid Cartilage Shape:

Pyramid-like

14

Arytenoid Cartilage Location:

Sits on surface of Cricoid Cartilage

15

Corniculate Cartilage Location:

One on the apex of each Arytenoid

16

Epiglottis Location:

Attaches to inner thyroid at the thyroid angle

17

Epiglottis Shape:

Large, Leaf-Like piece of cartilage

18

Epiglottis Function:

As larynx elevates in neck, epiglottis flips down to channel food into esophagus.

19

Cuneiform Cartilage Location:

Two cuneiform cartilages located in Aryepiglottic fold

20

Aryepiglottic Fold:

Fold of tissues running from arytenoids to epiglottis

21

Laryngeal Joints:
1.
2.

1. Cricoarytenoid Joint
2. Cricothyroid Joint

22

Cricoarytenoid Joint Movements:
1.
2.
3.

1. Rocking, in and out
2. Gliding, together and apart
3. Rotation (slight)

23

Cricoarytenoid Joint Functions:
1.
2.
3.

1. Adduction and Abduction of vocal folds
2. Changes the length of vocal folds
3. Improves sound quality

24

Cricothyroid Joint Movements:
1.
2.

1. Rotation, of thyroid up and down
2. Gliding, ant and post of horn

25

Cricothyroid Joint Functions:
1.
2.

1. Stretching and shortening of vocal folds
2. Affects pitch (frequency)

26

Extrinsic Laryngeal Membranes and Ligaments:
1.
2.
3.
4.
5.

1. Thyrohyoid membrane
2. Middle Thyrohyoid Ligament
3. Lateral Thyrohyoid Ligament
4. Hyoepiglottic Ligament
5. Cricotracheal Ligament

27

Extrinsic Layrngeal Membrane and Ligaments Function:

1. Connect larynx to adjacent structures

28

Thyrohyoid Membrane Location:

Occupies space between the hyoid bone and superior border of thyroid cartilage

29

Middle Thyrohyoid Ligament Location:

Between corpus and thyroid notch

30

Lateral Thyrohyoid Ligament Location:

Between greater horns of hyoid and superior horns of thyroid cartilage

31

Hyoepiglottic Ligament:

Attaches hyoid to epiglottis

32

Cricotracheal Ligament:

Attaches cricoid cartilage to trachea, wraps around circularly

33

Intrinsic Laryngeal Membranes and Ligaments:
1.
2.
3.
4.
5.
6.

1. Conus Elasticus
2. Medial Cricothyroid Ligament
3. Lateral Cricothyroid Membranes (vocal ligaments)

4.. Quadrangular Membranes
5. Ventricular/Vestibular Folds (ventricular ligaments)
6. Aryepiglottic Folds

34

Superior vs Inferior Intrinsic Laryngeal Membranes and Ligaments:
1. Superior:
2. Inferior:

1. Superior: Quadrangular Membranes
2. Conus Elasticus

35

Conus Elasticus Location:
1. Connects:
2. Runs from:

1. Connects inner surface of cricoid with arytenoids and thyroid cartilages.
2. Runs from cricoid arch to true vocal folds

36

Conus Elasticus Composed of:
1.
2.

1. Medial Cricothyroid Ligament
2. Lateral Cricothyroid Membranes (Vocal Ligaments)

37

Quadrangular Membranes Location (connects):

Margins from lateral side of epiglottis, angle of thyroid cartilage, apex and medial surfaces of arytenoids.

38

Quadrangular Membrane Composed of:
1.
2.

1. Ventricular Ligaments/Vestibular Folds (False vocal folds) (inferiorly)
2. Aryepiglottic folds (superiorly)

39

Ventricular Folds aka ____1____ and are formed from the ____2_____.

1. False Vocal Folds
2. Ventricular Ligament

40

Borders of Larynx:
1. Superior:
2. Inferior:

1. Superior: Aditus Laryngis (entrance to larynx)
2. Inferior: cricoid cartilage

41

Larynx Spaces:
1.
2.
3.
4.
5.
6.

1. Glottis
2. Supraglottal
3. Vestibule
4. Ventricle
5. False Glottis
6. Subglottal

42

Borders of Aditus Laryngis:
1. Anterior:
2. Posterior:
3. Lateral:

1. Anterior: Epiglottis
2. Lateral: Aryepiglottic Folds
3. Posterior: Apex of Arytenoids

43

Glottis Location:

Space between true vocal folds

44

Two parts of Glottis:
1.
2.

1. Membraneous: space between membraneous part of vocal folds
2. Cartilaginous: space between arytenoids

45

Supraglottal Location:

Space between Aditus Laryngis and Glottis

46

Supraglottal Spaces:
1.
2.
3.

1. Vestibule: region between Aditus Laryngis and ventricular ligaments (false vocal folds)
2. Ventricle: space between false vocal folds and true vocal folds
3. False Glottis: Space between false vocal folds

47

Subglottal Location:

Space below Glottis to inferior border of larynx

48

True Vocal Folds
1. Orgin:
2. Insertion:
3. Course:

1. Origin: inner thyroid cartilage at angle
2. Insertion: Arytenoid Cartilages
3. Course: Posterior

49

True Vocal Folds Composed of ___________.

5 Layers of Tissue

50

True Vocal Folds Layers, Superficial to Deep
1.
2.
3.
4.
5.

1. Epithelium
2. Superficial Lamina Propria
3. Intermediate Lamina Propria
4. Deep Lamina Propria
5. Thyroarytenoid Muscle

51

True Vocal Folds Layers: Covers
1.
2.

1. Epithelium
2. Superficial Lamina Propria

52

True Vocal Folds Layers: Comprise the Vocal Ligament:
1.
2.

1. Intermediate Lamina Propria
2. Deep Lamina Propria

53

True Vocal Fold Layers: Thyroarytenoid Muscle Composition:
1.
2.

1. Thyrovocalis Muscle (medial, closest to glottis)
2. Thyromuscularis Muscle: Lateral