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From Biology-Online Dictionary | Biology-Online Dictionary
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(Science: anatomy, muscle) origin, depression between the two laminae of thyroid cartilage; insertion, portions of vocal process of arytenoid; action, shortens and relaxes vocal cords; nerve supply, recurrent laryngeal; a number of the deeper and finer fibres of the thyroaryteroid muscle attached directly to the outer side of the true vocal cord.

Synonym: musculus vocalis, musculus thyroarytenoideus internus, vocal muscle.