objective: to test a new hypothesis that insulin, but not igf-1, triggers the hepatic parasympathetic nerve reflex.
目的:为了检验一个新的学说:是胰岛素而不是胰岛素样生长因子(igf-1 )激活肝脏副交感神经反射。
conclusion the results suggest that dle effect of parasympathetic nerve activity on atrioventricular node function is larger than that of sinoatrial node.