Alterations in the motility of the alimentary canal are associated with many symptoms of gastrointestinal disease. Examples of the digestive diseases that are manifested by a disturbance in motor activity are dysphagia, gastric stasis, vomiting, abdominal pain, paralytic ileus, and constipation. A number of gastrointestinalmotility enhancing agenta, such as metoclopramide (3), neostigmine (41, and bethanechol, have been developed to ...