Vagal control of pyloric resistance

A study conducted on anesthetized pigs shows that the efferent vagal nerve controls pyloric resistance which determines the flow of liquids from the stomach. Stimulation of the cervical and thoracic vagi nerve increases transpyloric liquid flow by decreasing pyloric resistance and antral wall tension. This increased flow is accompanied by an increase in antropyloroduodenal pressure. Vagotomy has no effect on pyloric resistance but it reduces gastric emptying of liquids antral pressure and pyloric pressure events.