It's a theory of phonation. VF closure -> build up of sub glottal air pressure -> pressure blows the folds apart -> folds vibrate -> air moves through glottal opening, decreasing pressure -> folds sucked back together.
What are the laryngeal cartilages?
Hyoid bone
Epiglottis
Thyroid cartilage
Cricoid cartilage
Arytenoids
Corniculates
Discuss the vocal folds, aryepiglottic folds and ventricular folds.
Vocal folds:
They have three layers
Epithelium: the outer cover.
Lamina propia: the middle.
Vocalis muscle: the body
Aryepiglottic folds:
They go from arytenoids to larynx. Help preserve airway.
Ventricular folds:
Sometimes vibrate with low frequencies.
What are the intrinsic muscles involved in phonation?
internal thyroarytenoid: it's the primary portion of thryoarynteoid muscles. it vibrates and produces sounds.
cricothyroid: lengthens and tenses vocal folds.
oblique and transverse arytenoid: contract and pull arynteoids together for adduction.
posterior cricoarynteoid: abducts
lateral cricoarytenoid: adducts
What are the extrinsic muscles involved in phonation?