SLHS 2203 Lecture Notes - Lecture 8: Thyroarytenoid Muscle, Vocal Folds, Phonation
13 Feb 2018
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Document Summary
Vocal folds are closed when we swallow. Intrinsic : both connection points reside within the larynx. Extrinsic : only one connection point is within the larynx. All intrinsic muscles (both connection points reside within the larynx). Thyroarytenoid: loosen folds, lower pitch, runs adjacent to the folds. **posterior cricoarytenoid: widen aperture (abduct) for inhalation. Transverse arytenoid : bring folds together for phonation. Oblique arytenoid : bring folds together for phonation. ** except for the posterior cricoarytenoid, all are involved in phonation. Inserts into the vocal process on the arytenoids and. Inserts into the muscular process on the arytenoids and the thyroid notch. Vocal folds were once thought of as being two cords stretched across the airway, like strings on a piano. We now know that vocal folds are multilayered folds of tissue that are continuous with other tissues in the throat. Vocal folds = multilayered structure can be stretched or contracted and made to vibrate at many different lengths.
