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Thyroepiglottic Part of Thyroarytenoid Muscle
Muscular System

Thyroepiglottic Part of Thyroarytenoid Muscle

Pars thyreoepiglottica musculi thyreoarytenoidei

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Quick 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.

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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

ScienceDirect image

The thyroarytenoid muscle lying in the cord shortens the cord.

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