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.