Week 4 Flashcards
What is the primary function of the larynx?
Protect the airway
- blocks foreign objects
- expells aspirated material, back flow, and extra mucus
What is the secondary function of the larynx?
Produce voice
Where is the larynx suspended from?
The hyoid
What does the larynx support?
tongue root
What is the function of suprahyoid muscles?
elevate the larynx
What is the function of infrahyoid muscles?
lower the larynx
Which muscles adduct the VFs?
thyroarytnoid muscle
lateral cricoarytnoid muscle
interarytenoid muscle
Which muscles abduct the VFs?
posterior cricoarytenoid muscle
Which muscles shorten and slacken the VFs?
thyroarytenoid muscle
Which muscles lengthen and stiffen the VFs?
cricothyroid muscle
Which muscles are innervated by the recurrent laryngeal branch of the vagus nerve?
thyroarytenoid
lateral cricoarytenoid
interarytenoid
posterior cricoarytenoid
Which muscles are innervated by the superior laryngeal branch of the vagus nerve?
cricothyroid muscle
What is pressed phonation?
Full adduction of VF
Holding breath momentarily bf speaking
phonotrauma
What is flow phonation?
phonation neutral
full resonant phonation
synchronized
What is breathy phonation?
gap between VF/glottis does not close
delayed onset of phonation
wastage of air
What is manner of phonation determined by?
sub glottal air pressure
trans glottal pressure drop
glottal resistance
What is the phonation equation?
sub glottal - trans glottal pressure drop = supra glottal pressure
What is phonation neutral position?
~ 3 mm b/t the VFs
What is the cover of the VF?
outermost layer
flexible
medial edge of vocal fold
What is the transition layer of the VF?
stiffer layer
What is the body of the VF?
stiffest layer
thyroarytenoid muscle
What is pitch?
perception of the frequency of a sound
What is the fundamental frequency?
rate of vocal cord vibrations
Vocal intensity is based on…?
subglottal pressure
