Anatomy of Phonation- section 1 striations Lecture 10/19/12

Question 1

What is the role of the larynx?

Answer 1

• it is an intrinsic part of the respiratory system
• the biological role is protective
• prevent air from escaping from lungs
• expel foreign substances threatening trachea
• the non-biological role is a sound generator

Question 2

Where is the musculocartilaginous structure?

Answer 2

Superior end of the trachea

Question 3

What is the musculocartilaginous structure comprised of?

Answer 3

• three unpaired and three paired cartilages bound by ligaments and lined with mucous membrane

Question 4

What are the three unpaired cartridges of the larynx?

Answer 4

• cricoid
• thyroid
• epiglottis

Question 5

What is the cricoid cartilage?

Answer 5

• Ring that sits on top of the trachea

- most inferior of the laryngeal cartilages

Question 6

What is the thyroid cartilage?

Answer 6

the largest laryngeal cartilage

• adam’s apple
• anterior surface is made of two plates called thyroid laminae joined at the thyroid notch

Question 7

What is superior cornu?

Answer 7

articulates with the hyoid bone

Question 8

What is inferior cornu?

Answer 8

articulates with the cricoid cartilage

Question 9

What cartilage contributes to us not being monotoned?

Answer 9

Thyroid cartilage

Question 10

What is cricothyroid joint?

Answer 10

The joints that form between the cricoid and the thyroid cartilage.

• a pivot (diarthroidial) joint
• allows for increased separation between thyroid and cricoid cartilages in anterior midline

Question 11

What are the 3 ligaments of the cricothyroid joint?

Answer 11

• anterior ceratocricoid
• lateral ceratocricoid
• posterior ceratocricoid

Question 12

What is the epiglottis?

Answer 12

• flexible leaf-like structure
• located just behind hyoid bone and root of tongue
• attached inferiorly to thyroid angle
• diverts food around the larynx during swallowing

Question 13

What are the three paired cartridges of the larynx?

Answer 13

• arytenoid cartilage
• corniculate cartilage
• cuneiform cartilage

Question 14

What is the Hyoid Bone?

Answer 14

• it is not a bone of the larynx
• forms union between tongue and larynx
• only non-contiguous bone in our body

Question 15

where is the corniculate cartilage?

Answer 15

They ride on the superior surface of each arytenoid.

Question 16

Where is the cuneiform cartilage? What does it provide?

Answer 16

In the aryepiglottic folds.

It provides a degree of rigidity to the folds

Question 17

Where is the arytenoid cartilage?

Answer 17

Rides on the upper surface of the cricoid cartilage- point of attachment for the vocal folds

Question 18

What are the joints formed between the arytenoids and the cricoid cartilage?

Answer 18

Cricoarytenoid joint

Question 19

Where is the cricoarytenoid joint?

Answer 19

Anterior and posterior ligaments bind and restrict the motion of the arytenoids

• permits rocking and some sliding
• rocking movements of arytenoids moves vocal processes up and out & down and in.
• A synovial (saddle) joint that permits articulation between the cricoid and arytenoid cartilages.

Question 19

What motion does the cricoarytenoid joint have?

Answer 19

• rocking motion

- sliding motion

Question 20

True or False:

We wouldn’t have pitch if we didn’t move our thyroid?

Answer 20

True

Question 21

Does the cricoid cartilage move?

Answer 21

No, you can push it.

Question 22

What cartilage is a small bead-like cartilages that cap each arytenoid?

Answer 22

Corniculate cartilages

• no real importance