Anatomy of Speech Flashcards
What muscles control inspiration?
diaphragm and/or intercostal muscles
What muscles control controlled expiration?
contraction of anterolateral abdominal muscles
builds a sub glottal pressure depending on the desired test
What muscles control phonation?
once a subglottal pressure is reached then air crosses the vocal cords causing a vibration
What impacts phonation?
length/tension of the vocal cords
shape/opening of the rima glottis
What muscles control resonance?
laryngeal buzz is amplified by the pharynx, oral cavity and nasal cavity as the larynx is unable to produce a loud enough sound
How are oral sounds produced?
soft palate tenses - CN V3 and elevates - CN X which closes off the enterance to the nasopharynx
causes a direct stream of air through the oral cavity
sound is interrupted by the tounge - CN XII and the teeth - CN VII to produce most vowels
How are nasal sounds produced?
soft palate tenses - CN V3 and descends - CN X to close off the enterance into the oropharynx
stream of air goes into the nasal cavity
What are nasal sounds?
m
n
ing
What is an electrolarynx?
a machine that makes sound for the patient and is placed on the neck
What innervates the intrinsic muscles of the larynx (apart from the cricothyroid)?
inferior laryngeal nerve
What supplies the cricothyroid?
external laryngeal nerve
What supplies all mucosa above the folds?
internal laryngeal nerve
What supplies all mucosa below the folds?
inferior laryngeal nerve (from the left recurrent laryngeal)
How is the pharynx clinically tested?
ask patient to swallow water
bad if they splutter
How is the larynx clincially tested?
ask patient to speak - hoarse voice = bad
ask patient to cough - powerful and normal?
