Speech Breathing
This muscle will flatten when contracted which in turn causes vertical expansion of the thoracic cavity.
What is the diaphragm?
Does speech happen on inhalation or exhalation? Why?
Speech occurs on expiration because outgoing airflow powers phonation
The amount of air taken in and out during quiet breathing.
What is tidal volume (TV)?
Gases that are being exchanged during respiration.
What is Oxygen (O2) and Carbon Dioxide (Co2)?
What is the primary biological function of the larynx?
Airway protection.
When lung volume increases.
What is lung pressure decreasing?
In typical, quiet breathing, inspiration is active but expiration is...?
What is passive?
The extra air that can be exhaled after a normal breathe.
What is Expiratory Reserve Volume (ERV)?
This structure is lined with C-shaped cartilage rings to prevent collapse and is known as the “windpipe.”
What is the trachea?
Name two biological functions of the larynx besides speech.
Protection, expelling material, thoracic fixation, bowel/bladder evacuation, childbirth.
Air will move in and out of the lungs to equalize this physical property?
What is pressure?
What two physiological processes help stop voicing?
Reduced subglottal pressure and reduced adduction.
Air that NEVER leaves the lungs (even after forced exhalation).
What is residual volume (RV)?
The structure that serves as both a protective valve for the airway and the sound source for speech.
What is the larynx?
What is the non-biological function of the larynx?
Speech and sound production.
In typical, quiet breathing, inspiration is active but expiration is...?
What is passive?
Why is sustained phonation considered a self-sustained oscillator?
Airflow pushes the folds apart and tissue elasticity brings them back together repeatedly.
The extra air that can be inhaled beyond a normal breath.
What is inspiratory reserve volume (IRV)?
This structure must abduct (open) for breathing and adduct (close) for phonation.
What are the vocal folds?
How does the larynx act as a resistor to airflow?
By controlling vocal fold adduction and abduction to regulate airflow.
Does speech happen on inhalation or exhalation? Why?
Speech occurs on expiration because outgoing airflow powers phonation
Give one clinical example of a disorder affecting each phase of phonation.
Onset: hard attack
Sustain: instability
Termination: delayed or abrupt stop
The sum of volumes that related to the total air available for speech?
What is vital capacity (VC)?
The structures (in order) of the upper, mid, and lower respiratory tract.
What is nasal cavity -> oral cavity-> pharyngeal cavity-> larynx-> trachea-> bronchi-> lungs.
Why is thoracic fixation important clinically?
It stabilizes the chest for activities like lifting, coughing, or bowel movements.