This study was designed to observe the effect of PNS on HR and HRV when the vagosympathetic trunks were stimulated without the influence of humor and temperature, and analyzed the potential mechanism. 本研究旨在去除体液、体温等多种因素的影响,通过电刺激迷走交感干,观察迷走神经对HR和HRV的影响,探讨迷走神经对HRV的调节机制。