esophageal sphincter lower

esophageal sphincter lower
(LES) the terminal few centimeters of the esophagus, near the esophagogastric junction, which prevents reflux of gastric contents into the esophagus. Called also cardiac, cardioesophageal, or gastroesophageal s.

Medical dictionary. 2011.

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  • Esophageal sphincter — The term esophageal sphincter refers to one of two sphincters that are part of the esophagus: lower esophageal sphincter (also called cardiac sphincter or gastroesophageal sphincter) which leads into the cardia. upper esophageal sphincter (also… …   Wikipedia

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  • Sphincter — A sphincter is an anatomical structure, or a circular muscle, that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning. Sphincters are found in many animals; there …   Wikipedia

  • esophageal achalasia — failure of the lower esophageal sphincter to relax with swallowing due to degeneration of ganglion cells in the wall of the organ. The thoracic esophagus also loses its normal peristaltic activity and becomes dilated (megaesophagus). Barium meal… …   Medical dictionary

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