Phonation PowerPoint

test 2

Body cover of the vocal folds:

• cover

  • mucosa

  • lamina propia

  • superficial layer

• transition

  • immediate layer

  • deep layer

• body

  • vocalis muscle

Phonation occurs due to ___, ____ vocal fold _____.

• flow induced

• self sustaining

• oscillation

Vocal folds are together for phonation and apart for respiration. T/F

• T

Adduction of vocal folds:

• muscle use

• cricothyroid is contracted and vocal folds are brought toward midline to close the glottis

Abduction of vocal folds:

• muscle use

• cricothyroid contraction is released and vocal folds move away from midline to open the glottis

The glottis is only present when the vocal folds are open. T/F

• T

• Glottis is not present when the vocal folds are closed

transglottal pressure difference:

• the difference between the pressure above and below the vocal folds

when subglottal pressure blows open the vocal folds, they are still _____

• adducted

what happens to speed of air molecs when vocal folds are closing?

• the speed increases

This increase leads to what pressure?

• negative intraglottal pressure

do the vocal folds close together after this?

• yes

What is the mucosal wave?

• when vocal folds oscillate, folds make a wave like fashion, kind of up and out