title: Upper esophageal sphincter in health and disease.
mesh_terms: D001274:Atmospheric Pressure; D003679:Deglutition; D004947:Esophagus / Q000033:anatomy & histology / Q000502:physiology / Q000503:physiopathology; D006801:Humans; D008365:Manometry; D009130:Muscle, Smooth / Q000502:physiology / Q000503:physiopathology; D010614:Pharynx / Q000033:anatomy & histology / Q000502:physiology / Q000503:physiopathology