Figure 4.

Effect of gas infusion into the jejunum and rectum on duodenal and rectal tone. Data during the baseline (I), equilibration (II), infusion (III), and recovery periods (IV) are shown. During the equilibration period (II), intraluminal lipids induced duodenal relaxation. During the infusion period (III), only jejunal gas infusion induced duodenal contraction whereas both jejunal and rectal gas infusion relaxed the rectum. *p<0.05 versus baseline period (I).