Thyroepiglottic Part of Thyroarytenoid Muscle
Pars thyreoepiglottica musculi thyreoarytenoidei
Read moreQuick Facts
Origin: Inner surface of thyroid cartilage.
Insertion: Aryepiglottic fold and epiglottis.
Action: Widens laryngeal inlet.
Innervation: Recurrent laryngeal nerve (CN X).
Arterial Supply: Superior and inferior thyroid arteries.
Related parts of the anatomy
Origin
The thyroarytenoid muscle sits within the larynx on the lateral aspect to the vocal fold. It is attached to the internal surface of the thyroid lamina and the cricothyroid ligament.
Insertion
A number of muscular fibers extend past the arytenoid cartilages to insert into the aryepiglottic fold or onto the lateral aspect of the epiglottis. These are the thyroepiglottic muscle fibers.
Actions
The thyroarytenoid muscle shortens and adducts the vocal ligament and the thyroepiglottic fibers widen the laryngeal inlet.
Learn more about this topic from other Elsevier products
Thyroarytenoid Muscle
The vocal muscle is the most internal portion of the large thyroarytenoid muscle lying externally to the laryngeal quadrangular membrane.
