Disorders affecting the motor function of the UPPER ESOPHAGEAL SPHINCTER; LOWER ESOPHAGEAL SPHINCTER; the ESOPHAGUS body, or a combination of these parts. The failure of the sphincters to maintain a tonic pressure may result in gastric reflux of food and acid into the esophagus (GASTROESOPHAGEAL REFLUX). Other disorders include hypermotility (spastic disorders) and markedly increased amplitude in contraction (nutcracker esophagus).

Synonyms: Disorders, Esophageal Motility Esophagus, Nutcracker Esophageal Dysmotilities Motility Disorders, Esophageal Esophageal Motility Disorder Dysmotilities, Esophageal Esophageal Dysmotility Disorder, Esophageal Motility Motility Disorder, Esophageal Dysmotility, Esophageal Esophageal Motility Disorders Nutcracker Esophagus