The thyroarytenoid is an intrinsic muscle of the larynx. It relaxes the vocal ligament, producing a softer voice. Attachments: Originates from the inferoposterior aspect of the angle of the thyroid cartilage and attaches to the anterolateral part of the arytenoid cartilage. Actions: Relaxes the vocal ligament. Innervation: Inferior laryngeal nerve (branch of recurrent laryngeal). Blood Supply: Laryngeal branches of the superior and inferior thyroid arteries. By TeachMeSeries Ltd (2025) Fig 1Superior view of the intrinsic muscles of the larynx. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Print Article Rate This Article