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用心率功率谱分析方法观察分析了不同频率电刺激大鼠躯体传入神经对心血管效应及其机制。结果表明，低频（２Ｈｚ）电刺激正中神经可引起心率加快，心率功率谱高频峰密度（ＨＦＰＤ）降低，低频峰密度（ＬＦＰＤ）与ＨＦＰＤ 比值（ＬＦＰＤ／ＨＦＰＤ）无明显改变；刺激坐骨神经可使心率、平均动脉压、ＬＦＰＤ 及ＬＦＰＤ／ＨＦＰＤ 增高，ＨＦＰＤ 降低（Ｐ＜ ０．０１）。而高频刺激正中神经或坐骨神经对心率、血压无显著影响，仅出现ＨＦＰＤ降低（Ｐ＜ ０．０５，０．０１）。结果提示，刺激正中神经所致的心率加快主要与心迷走神经抑制有关，而刺激坐骨神经引起的心率加快及血压升高主要与心迷走抑制和交感神经兴奋有关，而且这些作用具有穴位和刺激频率特异性
Heart rate power spectrum analysis was used to observe and analyze the effects of somatosensory afferent nerves on cardiovascular responses and their mechanisms under different electrical stimulation in rats. The results showed that low frequency (2 Hz) electrical stimulation of the median nerve could lead to an increase of heart rate, a decrease of high frequency peak density (HFPD) in heart rate power spectrum, no significant change of low frequency peak density (LFPD / HFPD) Mean arterial pressure, LFPD and LFPD / HFPD increased, while HFPD decreased (P <0.01). High frequency stimulation of median nerve or sciatic nerve had no significant effect on heart rate and blood pressure, but only HFPD decreased (P <0.05, 0.01). The results suggest that accelerating the heart rate induced by the median nerve is mainly related to the inhibition of vagal nerve depression. The acceleration of the heart rate caused by stimulating the sciatic nerve and the increase of blood pressure are mainly related to the inhibition of vagus nerve and the excitement of sympathetic nerves, and these effects have the specificity of acupoint and stimulation frequency