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Oblique arytenoid

Other Terms: Arytenoideus obliquus, Musculus arytenoideus obliquus, Muscle aryténoïdien oblique

Muscle parts

Ary-epiglottic part

Latin name

Musculus arytenoideus obliquus

Latin muscle parts

Pars aryepiglottica

Group

Branchial arch muscle – sixth arch (Laryngeal muscle)

Etymology

The English name for this muscle is the slanting muscle of the ladle shaped cartilage. The term arytenoideus comes from the Greek arytaina meaning “ladle or dipper” and the suffix eidos meaning “shape or form.” The Latin term obliquus means slanting or sideways and describes how the muscle approaches the cartilage at an angle.

Origin

Muscular process of one arytenoid cartilage

Insertion

Apex of the opposite arytenoid cartilage

Action

Adduct the aryepiglottic folds to help close the laryngeal inlet.

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 arytenoideus obliquus

French

Muscle aryténoïdien oblique

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