[The relationship between changes in concentration of blood sugar and period of interdigestive myoelectric complex].

We studied the relationship between changes in blood sugar level and periods of interdigestive myoelectric complex (IDMEC) in dogs, and found that the blood sugar concentration varied in each phase of IDMEC cycles, being the highest in phase I and the lowest in phase III. After intravenous injection of phentolamine or propranolol, the cyclic fluctuation of blood sugar level was abolished but the duodenal IDMEC still persisted. After vagotomy, blood sugar concentration was higher than that in fasting dogs and still showed fluctuations in the IDMEC cycle.