Effect of food intake on gastric myoelectric activity. (A) Dominant frequency, (B) bradygastria, (C) normogastria, and (D) tachygastria are shown. 1. Food withdraw in both group, 2. Food was presented to group A. Sal = saline, Ex-4 = exendin-4. Data represents the mean ± s.e.m. of 4 animals. Significant differences are shown as *P < 0.05, ***P < 0.001 (repeated measures two-way ANOVA followed by Bonferroni tests).