Thyroarytenoid - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x 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 (2026) 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 Frequent questions What is the function of the thyroarytenoid muscle? The thyroarytenoid muscle relaxes the vocal ligament, resulting in a softer voice. This action is crucial for modulating vocal pitch and tone during phonation. Where does the thyroarytenoid muscle originate and attach? The muscle originates from the inferoposterior aspect of the thyroid cartilage and attaches to the anterolateral part of the arytenoid cartilage. This specific attachment plays a key role in its function within the larynx. Which nerve innervates the thyroarytenoid muscle? The thyroarytenoid muscle is innervated by the inferior laryngeal nerve, a branch of the recurrent laryngeal nerve. This innervation is essential for controlling the muscle's actions during voice production. What is the blood supply to the thyroarytenoid muscle? The blood supply to the thyroarytenoid muscle comes from the laryngeal branches of the superior and inferior thyroid arteries. This vascularisation ensures the muscle receives adequate nutrients and oxygen for its function. How does the thyroarytenoid muscle contribute to voice production? The thyroarytenoid muscle contributes to voice production by relaxing the vocal ligament, which lowers tension and allows for a softer voice. This modulation is important for achieving various vocal qualities and dynamics. Rate This Article