Blocking Ih altered the duty cycle of the pyloric and gastric mill neurons. A: the duty cycle of the PD and LP neurons decreased, and the duty cycle of the PY and VD neurons increased, paired Student's t-test, PD: n = 10, P = 0.003; LP: n = 7, P = 0.004; PY: n = 7, P = 0.0003; VD: n = 7, P = 0.0003. B: the duty cycle of the MG and GM neurons increased, paired Student's t-test, MG: n = 9, P = 0.015; GM: n = 10, P = 0.001. A and B: *P < 0.05, **P < 0.01, and ***P < 0.001. Error bars are represented as SD.