Myoelastic-Aerodynamic Theory of Phonation

Question 1

Myoelastic-aerodynamics are responsible for….

Answer 1

vocal fold abduction and adduction (and resulting vibration)

Question 2

M-A theory is responsible for vocal fold abduction and adduction because of what 4 variables.

Answer 2

myo - involvement of muscles
elastic - ability of those muscles to return to their original state
aero - airflow and pressure
dynamic - movement and change

Question 3

Why do vocal folds come to midline?

Answer 3

by action of certain laryngeal muscles

Question 4

What happens when VF are fully approximated?

Answer 4

there is an increase in subglottal air pressure in proportion to supraglottal air pressure

Question 5

What does increased subglottal air pressure cause?

Answer 5

VF to separate first on their inferior border, then their superior border, eventually abducting (but not necessarily widely)