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isthmus of pharynx

 

Definition: passage posterior to the soft palate by which the nasopharynx and oropharynx communicate (i.e., the junction of nasopharynx and oropharynx), closed during swallowing by elevation of the soft palate and contraction of the posterior fascicle of palatopharyngeus (muscle), forming a Passavant cushion.

Synonym(s): isthmus pharyngis, pharyngeal isthmus

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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