PhonationMuscle Review & Physiology
Key Laryngeal Cartilages
Thyroarytenoid/Vocalis
Thyroarytenoid/Vocalis Location
PCA & Interarytenoids
PCA Action
Interarytenoid Action
LCA
LCA Action
Cricothyroid
Cricothyroid Activity
Cricothyroid Location and Action
Laryngeal Physiology• The vibrating vocal folds are the major source of  periodic sound for speech. The vocal folds may  a...
Glottal Tone Initiation• Before sound can be produced from the  vocal folds, several conditions must be  established:• 1. ...
• 2. It is also necessary to properly tense and  elongate the vocal folds prior to actually  producing sounds. Length and ...
• 3. Finally, there must be airflow from the  lungs. In order to be able to produce the  required flow of air from the lun...
The Phonatory Cycle: The   Aerodynamic-Myoelastic           Theory• The vocal folds are brought to the midline  of the glo...
The Bernoulli Force• The vocal folds return to the midline of the glottis  due to (a) elasticity, and (b) the Bernoulli fo...
Fluid Flow Through a     Constriction
Revised   review of phonatory physiology
Upcoming SlideShare
Loading in …5
×

Revised review of phonatory physiology

1,706
-1

Published on

Published in: Real Estate, Business, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
1,706
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
66
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Revised review of phonatory physiology

  1. 1. PhonationMuscle Review & Physiology
  2. 2. Key Laryngeal Cartilages
  3. 3. Thyroarytenoid/Vocalis
  4. 4. Thyroarytenoid/Vocalis Location
  5. 5. PCA & Interarytenoids
  6. 6. PCA Action
  7. 7. Interarytenoid Action
  8. 8. LCA
  9. 9. LCA Action
  10. 10. Cricothyroid
  11. 11. Cricothyroid Activity
  12. 12. Cricothyroid Location and Action
  13. 13. Laryngeal Physiology• The vibrating vocal folds are the major source of periodic sound for speech. The vocal folds may also produce aperiodic sounds.• In this section, we discuss two main aspects of phonatory physiology: – 1. How are the vocal folds put into vibration? – 2. How do we change the manner in which the vocal folds vibrate?
  14. 14. Glottal Tone Initiation• Before sound can be produced from the vocal folds, several conditions must be established:• 1. The vocal folds must be approximated or at least brought into the phonatory position. Phonation may also be initiated after complete closing of the vocal folds.
  15. 15. • 2. It is also necessary to properly tense and elongate the vocal folds prior to actually producing sounds. Length and tension are important determinants of the fundamental vibrating rate of the vocal folds.
  16. 16. • 3. Finally, there must be airflow from the lungs. In order to be able to produce the required flow of air from the lungs, there must be a sufficient quantity of air in the lungs.• Once the aforementioned conditions have been met, phonation can start.
  17. 17. The Phonatory Cycle: The Aerodynamic-Myoelastic Theory• The vocal folds are brought to the midline of the glottis via muscular forces.• Vocal fold adduction must occur in coordination with the expiratory air stream.• Subglottal air pressure builds below the closed folds.• The pressure eventually overcomes the resistance of the folds and separates them.
  18. 18. The Bernoulli Force• The vocal folds return to the midline of the glottis due to (a) elasticity, and (b) the Bernoulli force: – When a gas/fluid moving through a tube reaches a constriction, its velocity increases. – As the gas speeds through the point of constriction, a pressure drop occurs perpendicular to the direction of flow.• The vocal folds are sucked back together in this zone of low pressure.
  19. 19. Fluid Flow Through a Constriction
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×