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Pars cricopharyngea
Other Terms:
Cricopharyngeus,
Cricopharyngeal part of inferior pharyngeal constrictor,
Cricopharyngeal part of inferior constrictor pharyngeus,
Pars cricopharyngea (Musculus constrictor pharyngis inferior),
Musculus cricopharyngeus,
Pars cricopharyngea musculus constrictoris pharyngis inferioris
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 cricopharyngeus
Latin
Pars cricopharyngea musculus constrictoris pharyngis inferioris
