Vocal Fold Vibration & Laryngeal Function Flashcards
Vocal fold vibration is NOT
the product of repeated adduction and abduction of the vocal folds
What theory explains how the vocal folds vibrate?
- Myoelastic-Aerodynamic Theory of Phonation
What are 3 things that contribute to myoelasticity?
(The Myoelastic part of the theory)
- Elasticity
- Stiffness
- Inertia
Elasticity (as related to the myoelastic part of the theory of phonation)
- Returns to original shape after being displaced
- Vocal folds are muscles covered by delicate membranes. This soft tissue allows them to move when sufficient force is exerted.
Stiffness (as related to the myoelastic part of the theory of phonation)
- Strength of material that restores it to original shape
Inertia
- A body in motion tends to stay in motion
What is the principle that explains the Aerodynamic part of the theory of phonation?
- Bernoulli’s Principle
Bernoulli’s Principle
- There will be an increase in velocity of airflow at a point of constriction
- And a decrease in air pressure perpendicular to the flow
What are the 3 parts of vocal fold laryngeal function?
- Attack
- Sustain phonation
- Termination
Attack (in terms of laryngeal function)
- Adduct vocal folds to initiate phonation
Sustain phonation (in terms of laryngeal function)
- Maintain laryngeal posture
- Ongoing airflow maintains the vibration
Termination (in terms of laryngeal function)
- Abduct vocal folds to stop phonation
For our education and enjoyment:
What are the position of the vocal folds for each of the following states?
-Forced Respiration
-Whisper
-Phonation
-Quiet respiration
