Definition: intrinsic muscle of larynx; origin, inner surface of thyroid cartilage; insertion, muscular process and outer surface of arytenoid; action, decreases tension on (relaxes) vocal cords lowering the pitch of the voice tone; it is antagonistic to the cricothyroid muscle in this action; nerve supply, recurrent laryngeal.
Synonym(s): musculus thyroarytenoideusTA, musculus thyroarytenoideus externus
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