pharyngoesophageal constriction
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constriction — 1. [TA] A normally or pathologically constricted or narrowed portion of a structure. SYN: constrictio [TA]. SEE ALSO: stricture, stenosis. 2. The act or process of binding or contracting, becoming narrowed; the condition of being constricted.… … Medical dictionary
constrictio — SYN: constriction (1). c. bronchoaortica esophagea thoracic constriction of esophagus. c. diaphragmatica esophagea diaphragmatic constriction of esophagus. c. partis thoracicae esophagea [TA] SYN: thoracic constriction of esophagus. c.… … Medical dictionary
constrictio pharyngooesophagealis — [TA] pharyngoesophageal constriction: the narrowing where the pharynx ends and the cervical esophagus begins, the site of the pharyngoesophageal sphincter. Called also pharyngoesophageal junction … Medical dictionary
sphincter — A muscle that encircles a duct, tube, or orifice in such a way that its contraction constricts the lumen or orifice. SYN: musculus s. [TA], s. muscle [TA]. [G. sphinkter, a band or lace] s. of ampulla s. of hepatopancreatic ampulla. anatomic s.… … Medical dictionary
