Cricothyroid Roles

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Both Chapters Five and Six have different interpretations of the roles of the cricothyroid and thyroarytenoid muscles in different modes of voice production. In Chapter Five, the roles of the cricothyroid (CT) and thyroarytenoid (TA) muscles are tied into the process of modal voicing. During modal voicing, the TA muscle produces a lower pitch and slower vibrations of the vocal folds by tightening and increasing their mass per unit length, slowing down the vibrations of the vocal folds. Also during modal voicing, “to produce higer pitches, the vocal folds must be stretched out to decrease their mass per unit length. To achieve this, the cricothyroid (CT) muscles must contract” (Gick 88). The CT muscle stretches out the vocal folds by increasing

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