Slow wave or basic electric rhythm (BER) Definition: Spontaneous, slow and rhythmic fluctuation( depolarization and repolarization) on resting potential in gastrointestinal smooth muscle cells Size: 5-15mV(from -65 to-45mV Frequency: 3-12/min stomach---3: duodenum---12: ileum---8, 9 Size and frequency is influenced by neural and humoral regulationSlow wave or basic electric rhythm (BER) Size: 5-15mV (from –65 to-45mV) Definition: Spontaneous, slow and rhythmic fluctuation ( depolarization and repolarization) on resting potential in gastrointestinal smooth muscle cells. Frequency: 3-12/min stomach--- 3; duodenum---12; ileum---8，9 Size and frequency is influenced by neural and humoral regulation