Written by Roxanne Salkeld

Last updated February 1, 2023 • 8 Revisions

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.

Fig 1
Superior view of the intrinsic muscles of the larynx.

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