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Lateral crico-arytenoid
Other Terms:
Cricoarytenoid,
Crico-arytenoideus lateralis,
Lateral cricoarytenoid,
Lateral cricoarytenoideus,
Musculus cricoarytenoideus lateralis,
Muscle crico-aryténoïdien latéral
Muscle parts
None
Latin name
Musculus cricoarytenoideus lateralis
Latin muscle parts
None
Group
Branchial arch muscle – sixth arch (Laryngeal muscle)
Etymology
In English, this muscle’s name translates as the lateral muscle of the ring and ladle-shapes. Crico comes from the Greek krikos meaning “ring,” which is a reference to the ring-like cricoid cartilage of the larynx. Arytenoid is from the Latin arytaena meaning ladle, or dipper, combined with the Greek ending eidos meaning “shape or form.” Lateral is from the Latin latus meaning “side.”
Origin
Upper anterior aspect of the arch of the cricoid cartilage
Insertion
Anterior surface of the muscular process of the arytenoid cartilage
Action
Rotate the arytenoid cartilages medial to close the glottis.
Nerve supply
Vagus nerve (Cranial nerve X)
Blood supply
The laryngeal muscles receive blood from both the subclavian and external carotid arteries. The thyrocervical trunk of the subclavian gives rise to the inferior thyroid, which gives rise to the inferior laryngeal artery. This artery enters the larynx from below. Entering the larynx from above is the superior laryngeal artery, which is a branch of the superior thyroid artery from the external carotid.
Latin
Musculus cricoarytenoideus lateralis
French
Muscle crico-aryténoïdien latéral
