Physiology of Phonat

Question Answer
a response to an irritant, such as coughing comes from what cranial nerve 10th
generation of max airflow through glottis coughing
in coughing vocal folds are widely abducted, then tenses tight
coughing, subglottal pressure is significant and positive
coughing, larynx is elevated
throat clearning, vocal folds tightly adducted
throat clearing subglottal pressure is positive
throat clearing uses phonation, and uses a rubbing motion to clear vocal folds of mucus
throat clearing abusive? if done chronically
benefit to throat clearing brings material up high enough to clear passageways, start of phonation for some patients
abdominal fixation process of capturing air within thorax to stiffin upper torso
examples of abdominal fixation pushing, pulling, lifting, bathroom, having a baby
valsalva manuever take breath, hold, bear down
a modified valsalva is useful in swallowing treatment
quiet respiration abduction of vocal folds is 8 mm
forced respiration abduction of vocal folds is 16 mm
Respiratory reflexes under partial control holding breath, yawning — eventually you have to breathe
Vocal attack process of bringing vocal folds together to begin phonation
sustained phonation process of holding the vocal folds in a fixed position in the air stream during actual phonation
termination abducting the vocal folds to pull them out of the airstream to end phonation
vocal attack process of bringing vocal folds close enough together so turbulence can cause vibration. adducts folds
simultaneous attack vocal folds and breath stream start at the same time, coordinated start ex word: Zany to ssany
breathy vocal attack starting airflow before adducting vocal folds, we do this when we talk fast
glottal attack adduction occurs prior to airflow- we do this with words that start with a stressed vowel- ie: okay
hard glottal attack slamming the vocal folds together, more tension. hard on the voice, damaging tissues
breathy phonation TVF incompletely adducted allowing additional air to to escape during phonation. Sexy voice
breathy phonation can red flag for nodules, polyps, cancer
adduction is constant for all forms of attack
main arytenoid movement is inward rocking
arytenoid movement needs lateral cricoarit, thyromuscularis, aid by oblique and transverse arytenoids
what causes glottis to lengthen cricothyroid and posterior cricoarit
sustained phonation keeping speech going, adduction and abduction for speech.
maintained laryngeal posture by tonic contraction sustained phonation
tonic sustained tensing
when the vocal folds placed and held in airstream sustained phonation
vocal register how the vocal folds vibrate once air is flowing through them
mode of vibration pattern of activity of vocal folds through cycle of vibration
three most common registers modal, glottal, falsetto
modal register daily converstation, most important to SLP
most efficient to vocal mechanism modal register
Vertical mode for modal register opens inferior to superior, closes that way too. Like a bubble going up the vocal folds
Anterior posterior mode looking down on vocal folds, posterior closes last
Falsetto (normal) highest register of phonation, thin or high pitched
when do the TVF get reed like falsetto
Glottal fry (normal) rough, gravely, crackly, the im sick voice
low subglottal pressure and vibrating margin flaccid and thick glottal fry
which two registers can overlap modal and falsetto, like when asking a question
whistle register not a clear mode of vibration, playground shrieking
pressed phonation variation of modal, authoritarian voice
whispering is not a form of phonation! not good for your larynx either
intensity relative power or pressure of an aucoustic signal
instensity measured in db
larger the excursion of the vibrating body greater intensity of signal produced
pitch correlates with frequency
vocal folds vibrate at the same pitch monotone
the most appropriate for an individual is optimal pitch
what is about one forth octave above lowest frequency optimal pitch
average fundamental frequency reflects habitual pitch, sustained phonation
pitch changing mechanism tension, length and mass
tension is changed by strengthening or relaxing
tension increases so does frequency and pitch
has muscle spindles that monitors and maintains tonic muscle length posterior cricoarytenoid
approximates degree of tension cricothyroid
fine tunes degree of tension thyrovocalis
mass rearranged by lengthening
modal phonation 50 open, 37 closing, 13 closed
to increase vocal intensity tvf tightly compressed and more force to blow them open
suprasegmentals parameters of speech above phonetic level
prosody system of stress used to vary meaning (basically how you stress a word)
suprasegmentals carry 93 percent of word weight! Its all in how you say it
intonation changes of pitch in speech

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