Introduction -- Anatomy & Physiology of the Esophagus -- Anatomy & Physiology of the Stomach -- Effect of obesity on foregut physiology -- Diagnostic Testing -- Diagnostic imaging -- High resolution manometry w/ and w/o impedance -- Endo/Eso FLIP -- pH testing -- Endoscopy -- Foregut Motility Disorders -- Achalasia -- Ineffective esophageal motility -- Distal esophageal spasm -- Jackhammer esophagus -- Secondary esophageal motility disorders -- Esophagogastric junction outflow obstruction -- Gastric outflow obstruction -- Gastroparesis -- Rapid gastric emptying (Dumping syndrome) -- Absent peristalsis -- Normal Physiologic findings after hiatal hernia repair and fundoplication -- Normal Physiologic findings after bariatric surgery -- Normal Physiologic findings after esophageal myotomy -- Physiology after bariatric surgery -- Pathology/symptom Based -- Barretts Esophagus -- Gastroesophageal reflux disease -- Laryngopharyngeal Reflux -- Esophagitis -- Eosinophilic Esophagitis -- Paraesophageal hernia -- Primary dysphagia -- Persistent dysphagia after prior anti-reflux procedure -- Persistent dysphagia after esophageal myotomy -- Recurrent reflux after prior fundoplication -- Reflux after prior myotomy -- Reflux after bariatric surgery -- Duodenal switch.