It has been reported that interdigestive motor activities occur in the 
gallbladder and sphincter of Oddi as well as in the gastroduodenal tract and 
truncal vagus nerves modulate the gastroduodenal motility pattern. In the 
present study, the vagal branches which influence on the interdigestive motor 
activity of these organs were determined in conscious dogs. In the normal dog, 
interdigestive motor activities closely related to interdigestive migrating 
motor complex (IMC) in the gastric antrum and descending duodenum were recorded 
in the gallbladder and sphincter of Oddi. In dogs whose celiac branches of the 
vagus nerve were chronically resected, cycle periods of interdigestive motor 
activity in the stomach, duodenum, gallbladder and sphincter of Oddi 
significantly prolonged as compared with those in the normal dog but the 
interrelation of them persisted. Quiescent period in motility prolonged and the 
active period shortened. Resection of the pyloric branches had no influence on 
the interdigestive motor activities in all organs. The results imply that celiac 
branches of the vagus nerve modulate the interdigestive motor activity in the 
stomach, descending duodenum, gallbladder and sphincter of Oddi.