STUDIES ON THE DEVELOPMENT OF GASTRIC ULCER RELATING TO THE SMOOTH MUSCLE OF STOMACH BY ELECTRO-GASTROGRAPHY

The authors investigated previously the smooth muscle of stomach at different portions, studying on gastric electro-myogram, tonus against intraluminal pressure, electrical muscular sensibility and anatomical structure of gastric muscles in dogs. Also in human stomach, the observations were made on the electro-myogram and the correlation between the anatomical structure and the location of gastric ulcer.The results were:1) The difference in motilities according to the difference of portions, particularly between antrum and body has been evidenced.2) Both gastric peristalsis and tonus are considered to be governed chiefly by the circular muscle. Therefore, the difference in motilities, peristalsis and tonus, should be produced by the difference of structure and development according to gastric portions.3) A strain produced by the difference in motility between active antrum and less active body may be one of the important factors contributing to the development of gastric ulcers on or near the border line of gastric mucosa.