Phonation Function Day 1

Non-laryngeal speech function

Non-laryngeal speech function

thoracic fixation, expelling objects, nothing gets into lungs (protective function)

Phonation is maintained by

the Bernoulli effect and tissue elasticity

if volume of fluid flow is constant, ________ of flow must increase at an area of vocal fold constriction, but with a corresponding decrease if __________ at the constriction

velocity, pressure

velocity increases at _____ constriction and results in a ________ pressure between medial edges of VF and they will literally be sucked toward one another.

glottal, negative

at a point of constriction there will be a decrease in air _______ perpendicular to the flow

pressure

at a point of constriction there will be an increase in ________ of the flow

velocity

phonation begins with

attack

In all types of attack, adduction is a

constant

attack is the process of bringing VF together to begin phonation and

this requires muscular action

adduction and the onset of respiration occur simultaneously

simultaneous vocal attack

start of significant air flow before adducting the VF

breathy vocal attack

adduction of VF occurs prior to airflow, much like a cough

glottal attack

3 directions arytenoid cartilages can move in

rocking, gliding and rotation

what is the primary arytenoid movement for adduction

inward rocking

vocal attack AND termination of phonation requires

muscular action

abduction of VF pull the vocal folds out of the ________ to stop vibration

turbulence

abduction of the vocal folds terminate phonation frequently when

speaking

sustained phonation depends on

maintenance of pressure, flow, and VF approximation

vibration of the VF is NOT

the product of repeated adduction and abduction of the VF; the VF are held in place

VF vibration is purely that of ________ interaction with the elastic characteristics of the VF

aerodynamic

the actual vibration of the VF is the product of airflow interacting with the tissue ________________ repetitive muscular contraction

in the absence of

how many steps does the cycle of phonation have

7

air pressure beneath the VF arises from

respiratory flow

air pressure causes the VF to separate

inferiorly

what part of the VF begin to open

the superior part

the VF are ______, the flow between the folds _________, and pressure at the folds __________

open, increase, decreases

what causes the folds to more back toward midline

decrease pressure and tissue elasticity

the vocal folds make an impact

inferiorly

VF open and close from which direction

inferior to superior

how many vocal registers are there?

3

used in daily conversation and most important for SLPs

modal register or modal phonation

modal registers two categories

pressed phonation and breathy phonation

crackly voice quality, rough and low in pitch, may indicate illness

glottal fry register or pulse register

highest register of phonation, vocal folds lengthen and become thin, required increased VF tension

Falsetto