Changes of gastrointestinal myoelectric activity and bile acid pool size after cholecystectomy in guinea pigs

Figure 1 A typical phase III complex in one guinea pig in A (control) group. The migrating motor activity was most prominent in the duodenum. In duodenum phase III consisted of 28-53 spike bursts occurring and each spike bursts consisted of 9-18 action potentials. The duration of each duodenal spike burst was very regular (1.3-1.8 s) as was the interval between successive spike bursts (2.5-3.4 s). (Small arrow indicates origination and termination of phase III.).