Voice Flashcards
In the cover-body theory of phonation, what is thecover
Epithelium
Superficial, intermediate, and deep layers of lamina propria
which nerve innervates the posterior belly of the digastric
VII
What does the internal branch of the SLN innervate
sensory info
what arteries supply the larynx
superior laryngeal
cricothyroid
inferior laryngeal
which are the 5 intrinsic laryngeal muscles
- thyroarytenoid
- cricothyroid
- posterior cricoarytenoid
- lateral cricoarytenoid
- interarytenoid (transerves and oblique)
which muscles depress the larynx
- thyrohyoid
- omohyoid
- sternothyroid
- sternohyoid
which muscles elevate the larynx
- digastric
- geniohyoid
- mylohyoid
- stylohyoid
- genioglossus
- hyoglossus
what is the mean fundamental frequency of a child
age 7 to 8; 281 TO 297 HZ
age 10 to 11: 238-270 HZ
what are the max phonation times for children
- age 3-4: 7.5 to 8.95 sec
2. age 5-12: 14.97 to 17.74 sec
what is the fundamental frequency of men
100-150 Hz or approx 125
what is the fundamental frequency of women
180 to 250 or approx 225
what is the max phonation time for adults
20.9 to 24.6 seconds
what happens to men’s and women’s fundamental frequency as they age
women lower to 201 and men raise to 132-146
what are age related changes in the larynx
- hardening of cartilages
- degeneration and atrophy of muscles
- degeneration of mucosa
- decreased flexibility of cricoarytenoid joint
what is presbyphonia
age related voice disorder characterized by perceptual changes in quality, range, loudness, and pitch
what is assessed in voice
- pitch
- loudness
- quality
what is fundamental frequency
vibration of the vocal fold
what determines the pitch of the vocal fold
- mass
- tension
- elasticity
what is jitter
irregular vibration of the vocal fold
what is shimmer
cycle to cycle variation in amplitude
more than 1 dB variation makes someone dysphonic
what is hoarseness
combination of breathy and harsh from irregular vocal fold vibration
sound low pitched breathy and husky
what is harshness
rough, unpleasant, gravelly
associated with excessive muscular tension.
folds too tightly adducted and air released too abrupt
what is a strain-strangle quality
phonation is effortful
patient sounds as if squeezing the voice at the gottis
initiating and sustaining voice difficult
what is breathiness
breathy voice from folds being slightly open
often quiet with little variation in loudness
restricted vocal range
what is glottal fry
when folds vibrate very slowly with no clear, regular pattern of vibration
results in bursts of extremely low pitch
sounds crackly
what is vocal fry
- vibratory cycle near the bottom of normal pitch range
- produced at end of long phrase when air flow and pressure are low
- may help modify stridency
what is diplophonia
- occurs when folds vibrate at different frequencies to to different degrees of mass or tension
- can occur with a unilateral polyp
what is stridency
shrill, unpleasant voice, somewhat high pitched and tinny
2. caused by hypertonicity or tension of pharyngeal constrictors and elevated larynx
what is needed in a voice case history
- patient perception of problem, onset, duration, causes, and variability
2 any associated symptoms - health, environmental and family history
- previous therapy, medical interventions
- daily usage
- medical history
- obtain perceptions of what constitutes a typical voice in culturally and linguistically diverse
what is necessary to have before you start voice treatment
medical evaluation by laryngologist
what is an indirect laryngoscopy
use a bright light and small mirror to lift the velum and press against the posterior pharyngeal wall to view larynx during phonation
what is direct laryngoscopy
performed by surgeon under general anesthesia
- laryngoscope introduced through mouth to vocal folds
- patient cannot phonate so it is a visual only
what is a rigid endoscopy with videostroboscopy
- introduced orally
what is flexible endoscopy
inserted through nasal passage
passes over velum
3. patient can speak
4. can also view false vocal folds to see if there are maladaptive compensatory movement
how does videostroboscopy work
- pulsing light is flashed at same fundamental frequency of folds
- microphone placed on neck along thyroid cartilage
- image yields info about periodicty of fold vibrations, amplitude, glottal closure, adequacy of mucosal wave, and possible presence of lesions
how are acoustic measures evaluated
- sound spectography
- electroglottography
- laryngeal electromyography
- video mymography
what is sound spectography
graphic representation of sound wave’s intensity and frequency over time
what is the value of wide band spectograms
wide band spectograms give better time resolution
what is the value of narrow band spectograms
narrow band have better frequency resolution
harmonics are easily seen
useful for evaluating voice disorders because it creates a graphic representation of the harmonic structure
what is electroglottography
surface electrodes placed on both sides of thyroid cartilage
2. high frequency electric current passed between electrodes during phonation
what is electromyography
needle inserted into peripheral laryngeal muscles
- look for reduced or increased speed of muscle activation, extraneous bursts of muscle activity
- useful to determine pathology caused by neurologial or neuromuscular disease
- used prior to Botox injection
what is videokymography
high speed medical imaging of vocal fold vibration
2. allows visualization of left-right vocal fold asymmetries, propagation of mucosal waves, and movement of upper and lower margins of folds
what is tidal volume
the amount of air inhaled and exhaled during normal breathing cycle
what is vital capacity
volume of air that patient can exhale after max inhalation
what is total lung capacity
total volume of air in lungs
what does a Visi pitch measure
dynamic range
intensity
frequency variability
pitch and loudness
what do you look for to assess respiration perceptually
- clavicular breathing: shoulders elevate during inhalation
- diphragmatic breathing: uses lower thoracic cavity and abdomine
- thoracic breathing: uses rib cage
- thoracic breathing
how is phonation assessed
- max phonation time
2. s/z ratio
what is an s/z ratio
1 indicates the efficiency of glottal closure
2. a ratio of 1.4 is indicative of laryngeal pathology
what do QOL assessments evaluate
- physical aspects of the voice disorder
- functional impacts on daily activities
- social impact or how patient feels about it
where is hypernasality mostly perceived
high vowels because held longer than consonants, and the high tongue position reduces space for oral resonance and increases pressure through the velum
which consonants are affected by hypernasality
fricatives, affricates, and plosives
what is velopharyngeal insufficiency
mechanism is inadequate to achieve closure
what are the major causes of VIP
- decreased muscle mass of velum
- adenoidectomy or tonsillectomy
- paresis of velum which reduces mobiity