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Inferior pharyngeal constrictor

Other Terms: Inferior pharyngeal constrictor, Inferior constrictor of pharynx, Inferior constrictor pharyngeus, Inferior constrictor, Musculus constrictor pharyngis inferior, Muscle constricteur inférieur du pharynx

Muscle parts

Thyropharyngeal part or thyropharyngeus

Latin name

Musculus constrictor pharyngis inferior

Latin muscle parts

Pars thyropharyngea or musculus thyropharyngeus

Group

Branchial arch muscle – fourth arch (Pharyngeal muscle)

Etymology

The English equivalent for this muscle name is the lower muscle that draws the cleft or gulley together. The word constrictor comes from the Latin terms con meaning “together” and the verb stringere meaning “to bind.” The word pharynx, what is referred to as the throat, arises from the Greek pharangos meaning “cleft, gulley, or ravine.” The Latin word inferior comes out of inferus meaning “low or lower.”

Origin

Lateral surface of the cricoid cartilage; oblique line and adjacent surface of the thyroid cartilage; inferior cornu of the thyroid cartilage

Insertion

Median raphe of the pharynx

Action

Produce both sphincteric and peristaltic actions during swallowing.

Nerve supply

Vagus nerve (Cranial nerve X)

Blood supply

The pharyngeal branches of the ascending pharyngeal artery and the inferior thyroid artery, a branch of the thyrocervical trunk of the subclavian artery, supply muscular branches to the inferior constrictor.

Latin

Musculus constrictor pharyngis inferior

French

Muscle constricteur inférieur du pharynx

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