Lectures 17-? Flashcards
~Basic Definitions~
Resonance:
Voice:
Adduction:
Abduction:
Resonance: The quality of the voice that is produced from sound vibrations in the pharyngeal, oral, and nasal cavities
Voice: The complex, dynamic product of vocal fold vibration that allows us to vocalize and verbalize.
Adduction:The state in which the vocal folds must are closed (active)
Abduction: The state in which the vocal folds are open (at rest)
Velopharyngeal dysfunction (VPD) definition:
Failure of the velopharyngeal mechanism to separate the oral and nasal cavities during speech and swallowing
~Pitch Terms~
Habitutal Pitch:
Optimal Pitch:
Basal Pitch:
Ceiling Pitch:
Vocal Range:
Habitual Pitch: average speaking voice
Optimal Pitch: natural, comfortable voice
Basal Pitch: lowest pitch in habitual voice
Ceiling Pitch: highest pitch in habitual voice
Vocal Range: continuous voice from lowest to highest pitch
~Vocal Pitch~
- Frequency of the voice constantly varies during speech
- Monotone voice: Result of not varying habitual speaking frequency
- Varying pitch has linguistic significance
- Modifications in length and tension of the
vocal folds are necessary to produce
pitch change
Measured in hertz (Hz): the number of complete vibrations/ second
Perceptual correlate – Fundamental
Frequency (FO):
F0 for men is
F0 for women is
F0 for children
Perceptual correlate – Fundamental
Frequency (FO): associated with RATE of vocal fold vibration
F0 for men is around 125 Hz
F0 for women is around 250 Hz
F0 for children can be up to 500 Hz
Vocal Loudness
-Perceptual correlate of intensity
-Measured in decibels (dB) -Conversational speech
averages around 60 dB
-Alveolar pressure is the major
determinant of vocal intensity
~Normal lifespan issues; voice quality~
Presbyphonia:
Women:
Men:
Laryngeal cartilages and joints begin to ossify or calcify around the third (men) and fourth (women) decades
- Presbyphonia: Voice disorder characterized by perceptual changes in pitch, pitch range, loudness, and voice quality in older individuals
- Menopause and hormone-related factors causing edema may be responsible for the change in women (lowered F0)
- For men, age-related changes to laryngeal muscle due to atrophy may be responsible for increased F0 in older men
~Normal Lifespan Issues; Resonance~
-Closure patterns may vary among individuals and can change over time
-Young children with adenoidectomy may have to change their closure patterns
-Velopharyngeal function during speech production remains intact and unchanged from young adulthood through advanced age
~Risk Factors for Voice Disorders~
Adults:
Children:
Adults:
-Specific vocal behaviors such as loud talking, coughing, or throat clearing may predispose some individuals to voice disorders
-Women are more often affected than men
-When resonance, pitch, loudness, or general phonatory quality lasts for longer than 2 weeks
Children:
-In children 3-10 years old, prevalence of voice disorders is about 6% with boys affected more often
-Voice disorders in children are usually related to vocal misuse/abuse and are typically temporary
-“yells, screams, or cries frequently” -“loses his/her voice every time s/he has a cold”
-“uses a lot of effort to talk”
Vocal Disorder:
When one or more perceptual aspects of voice such as pitch, loudness, or voice quality are outside the range of normal for an individual’s age, sex, cultural background, or geographic location
~Structural Voice Disorders; Vocal Polyps~
What is it?
~Kinds~
Sessile Polyps:
Pedunculated polyps:
Symtoms:
What is it?
-Fluid filled lesions when blood vessels rupture & swell
Tend to be unilateral, larger than nodules, prone to hemorrhage Can result from single traumatic event Sensation of something in throat Surgical removal & Voice Therapy
~Kinds~
Sessile Polyps: closely adhere to vocal folds & can cover 2/3 of vocal fold
Pedunculated polyps: appear attached to vocal fold by means of a stalk
Symtoms: hoarseness, breathiness, & diplophonia
~Structural Voice Disorder; Constance ulcers and granulomas~
What is it?
Causes:
Symptoms:
What is it?
* Contact Ulcers are small, reddened ulcers on the posterior surface of the vocal folds in the region of the arytenoids
* Usually bilateral & painful
* Change/replaced by granulated tissue called a granuloma
Causes:
* GERD
* Trauma from intubation
Symptoms:
* Hoarseness
* Breathiness
* Throat clearing
* Vocal fatigue
* May reappear after removal
~Structural Voice Disorders; laryngeal webs~
What?
Causes:
Symptoms:
Treatment:
What?
Result of connective tissue growth
between vocal folds
Causes:
*Congenital or acquired
Symptoms:
* Interferes with breathing
* Stridor
* Shortness of breath
* Produces high- pitched, hoarse quality or absence of voice
Treatment:
* Must be surgically removed
~Neurological Voice Disorders; Vocal fold paralysis~
Cause:
Results:
Unilateral vocal fold paralysis:
Bilateral vocal fold paralysis:
Treatment:
Cause:
-Damage to CN X (vagus nerve)
-Recurrent laryngeal nerves supplies the laryngeal muscle for voice activation
Results:
-Risk of aspiration – vocal folds are not protecting the airway if abducted
Unilateral vocal fold paralysis:
-hoarse/breathy voice
-reduced loudness
-monoloudness
-pitch breaks
-diplophonia
Bilateral vocal fold paralysis:
-breathy voice
-weak voice or absent voice
Treatment:
-Surgical intervention Voice Therapy after surgery
-Goal to increase vocal fold closure & loudness
~Neurological Voice Disorders; Parkinson Disease~
Cause:
Characteristics:
Treatment:
Cause: Degeneration of dopaminergic neurons in the substantia nigra interfering with the function of the basal ganglia
Characteristics:
-Muscle rigidity
-Reduced range of motion
-Tremor at rest
-Hypokinesia
-No facial movement
-Reduced loudness
-Monopitch
-Monoloudness
-Hoarseness
-Harshness
-Breathiness
Treatment:
Deep brain stimulation Speech Therapy for Voice Goal: to increase
vocal fold adduction to improve loudness and intelligibility
~Functional Voice Disorders; muscle tension dysphonia~
Causes:
Symptoms:
Treatment:
Causes: Abnormal muscle activity in the absence of structural or neurological abnormalities
Symptoms:
-Hoarseness
-Strained harshness
-Strained breathiness
-Aphonia
-Intermittent pitch breaks
Treatment:
-Speech Therapy for hyperadduction
~Functional Voice Disorders; conversation aphonia~
Causes:
Symptoms:
Treatment:
Causes:
Suppressed, strong emotions Vocal folds are not approximating for speech production
Symptoms:
Coughing & throat clearing
Treatment:
Will persist until person is willing To resolve emotional conflict Psychologist referral
~Functional Voice Disorders; mutational falsetto AKA puberphonia~
What?
Treatment:
What?
-Continual use of high-pitched voice by adolescent or adult males who have gone through puberty
Treatment:
-Most benefit from behavioral voice therapy to lower pitch
Psychological referral
~Resonance Voice Disorders~
Causes:
~Types~
Hyponasality:
Denasality:
Hypernasality:
Symptoms:
Causes:
-Structural abnormalities
-Cleft palate
~Types~
Hyponasality:
Blockage in the nasopharynx that impedes sound from traveling through the nose for production of nasal sounds i.e., m/n/ng
Denasality:
Complete blockage of the nasopharynx
Hypernasality:
-Velopharyngeal mechanism fails to decouple the oral and nasal cavities
-Secondary to Velopharyngeal dysfunction
Symptoms:
-Audible nasal emission
-Nasal rustle
-Nasal turbulence
~Assessment for voice disorders~
Auditory-perceptual evaluation:
Visipitch Equipment:
Voice handicap index:
Overall Assessment:
Auditory-perceptual: evaluation to describe pitch, loudness, and voice characteristics
May include detailed acoustic and physiological measurements with Visipitch Equipment
The Voice Handicap Index can help determine the psychosocial effects of a voice disorder
Case History
Clinical Observation
Description of the voice problem
When it started
Duration
What the client believes might be causing it
How it affects daily life
Person’s social and vocational use of the voice
Overall physical and psychological condition
~Other voice Instrumentation~
Nasometer:
Multi-view videofluorscopy:
Videonasendoscopy:
Nasometer:
* Measured the relative amplitude of acoustic energy being emitted
through the nose and mouth during phonation
* Nasalance score is computed to reflect the magnitude of hypernasality
Multi-view videofluorscopy:
* Motion picture X-ray recorded on DVD
* Permits imaging of velopharyngeal function from three different
perspectives
Videonasendoscopy:
* Also known as fiberoptic nasendoscopy
* Lens, fiberoptic light cable, insertion tube, camera, and connection to a monitor
~Treatment Approaches for Benign Structural Abnormalities~
- Voice therapy is the clinical method of choice for vocal misuse/abuse
- Taught to modify vocally abusive behaviors
- Educated about laryngeal pathology
- Goal is to teach the client to eliminate vocally abnormal or abusive behavior by producing a voice that balances respiratory, laryngeal, and articulatory/resonatory subsystems
~Treatment Approaches for Resonance Disorders~
Medical Management:
Prothetic Management:
* Palatal obturator
* Speech bulb obturator
* Palatal lift
Medical Management:
* Children born with palatal clefts undergo surgical closure between 9
and 18 months of age
* Surgery to repair cleft lip occurs before 3 months of age
Prothetic Management
* Palatal obturator: Similar to a retainer; can cover a fistula until
further surgery is warranted
- Speech bulb obturator: Can be used when the velum is too short to
contact the posterior pharyngeal wall or when it is immobile - Palatal lift: Used when the velum is immobile
~Treatment Approaches for Resonance Disorders~
Behavioral Management:
Electropalatograohy (EPG):
Behavioral Management:
* May be appropriate for individuals with VPI resulting in mild hypernasality after surgical repair of a cleft palate
* Continuous positive airway pressure (CPAP) can be used to strengthen muscles of the velum
* Based on exercise physiology principle of progressive resistance training
Electropalatography (EPG):
* An artificial palate plate containing electrodes connected to a computer is used to determine when the tongue contacts the electrodes
* Can be used to learn correct placement of articulators
~Treatment Approaches for Resonance Disorders~
Treatment of Articulation Disorders Secondary to VPD:
Treatment of Articulation Disorders Secondary to VPD:
* Direct intervention for speech-sound development should begin prior to the first palatal surgery, around 5-6 months
* Early intervention should focus on increasing consonant inventory,
pressure consonants (stop/plosives e.g., p/b) and increased oral airflow
* Teaching the difference between oral and nasal sounds, as well as how to direct airstream through the mouth (using a nose clip) may be helpful
* For children who substitute glottal stops for high-pressure consonants, direct treatment should begin as soon as possible