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Thyrohyoid

Other Terms: Musculus thyrohyoideus, Muscle thyro-hyoïdien

Muscle parts

None

Latin name

Musculus thyrohyoideus

Latin muscle parts

None

Group

Cervical wall – ventral muscle (Infrahyoid muscle)

Etymology

In English, this muscle’s name is the muscle of the shield-like cartilage and the U-shaped bone. The term thyro is from the Greek term thyreos for “shield.” The Greek word thyreos comes from thyra meaning door and referred to a large, oblong stone that was used as a door. The term thyreos was later used to refer to large oblong shields used by Minoan warriors. The shields covered them from shoulders to feet, with the top of the shield having a notch for the chin. It was this shield that the ancient anatomist Galen envisioned when he named the laryngeal cartilage in the 2nd Century. The term hyoid comes from its resemblance to the Greek letter upsilon (u), which is aspirated as hy. This is combined with the suffix eidos meaning “shape or form.”

Origin

Oblique line on the lamina of the thyroid cartilage

Insertion

Inferior border of the greater cornu and adjacent hyoid body

Action

Depresses the unfixed hyoid bone, when the hyoid is fixed it elevates the thyroid cartilage.

Nerve supply

Ventral ramus via the hypoglossal nerve (C1)

Blood supply

Infrahyoid artery and superior laryngeal artery from the superior thyroid artery, suprahyoid branch of the lingual artery, inferior thyroid artery from the thyrocervical trunk of the subclavian artery

Latin

Musculus thyrohyoideus

French

Muscle thyro-hyoïdien

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