24 hour recording of gastric movements in the conscious dog
Aizawa, I.; Takeuchi, M.; Takayanagi, R.; Itoh, Z.
Nihon Heikatsukin Gakkai Zasshi 13(1): 1-8
1977
ISSN/ISBN: 0374-3527 PMID: 559860 Document Number: 116676
Gastric movements were monitored in 5 conscious dogs weighing 9-13 kg by extraluminal force transducers (EFT) which were independently developed and constructed. After chronically implanting EFT both in the canine gastric body and antrum, continuous recordings of their movements were made over several days. Dogs fed once a day with regular meals showed a circadian rhythm which was divided into 3 phases; digestive, intermediate and interdigestive. The digestive phase, which continued for about 8-10 h after feeding, was characterized by a lack of movement in the body and repetitive rhythmical contractions having a rather small amplitude in the antrum. The interdigestive phase was distinguished from other phases by a peculiar sequence of gastric movements (interdigestive contractions) which did not make their appearance until 16 h after feeding. These interdigestive contractions were the highest amplitude contractions to occur in both the body and antrum during the day. They continued for 70 min and repetitively recurred after intervening quiet periods of about 22 min. The intermediate phase was the period interposed between the digestive and interdigestive phase.