The effect of changes in blood glucose on the motility of the duodenum in sheep

Experiments have been carried out on four adult ewes to determine the effects on duodenal motility of intravenous or intraduodenal infusion of glucose solution and intravenous injection of insulin. At blood glucose levels below 80 mg%, the mean frequency of duodenal contractions was 1.6/min, but following the establishment of hyperglycemia by either intraduodenal or intravenous glucose infusion, contraction frequency fell to 0.9/min. The strength of contraction was unaffected.