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limb-angle-Dependent Frequency Spectrum of Electrical Conductance for 12 Yuan Acupuncture Points

Limb-Angle-Dependent Frequency Spectrum of Electrical Conduc...

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第十八届中国科协年会——分16 针灸大科学研究学术高峰论坛

作者： Jingjing XU Hongbin HAN Shengyong XU Peking University

With a long history of thousand years, conventional Chinese acupuncture treatment has been used worldwide as an important alternative treatment in daily clinical practice. However, the actual physical structures of various meridians, the networks along which acupuncture points are distributed, and how do electrical signals propagate along the meridian networks, still remain as controversial and open issues to date. Electrical conductance measurement is one of the approaches that have been extensively applied to address the above two open issues [1-3]. In this work, we reported twodimensional(2D) mapping of electrical conductance in the range of 40 Hz to 10 k Hz for a number of acupuncture points on hands and feet, with respect to universal electrodes wrapped on upper arm(or leg), by means of a high-accurate impedance analyzer. We repeatedly observed that for some acupuncture points showed dominant conductance peak in the 2D mapping, while others did not. The results were consistent with previous reports [1]. For the first time, we examined the change in conductance spectrum of each acupuncture point when the limb(arm or leg) angle was changed during the measurements. For the bending angle increases from zero degree to more than 90 degree, the measured electric conductance of 12 Yuan acupuncture points behaved differently, that some increased but some decreased, and the left side could play opposite direction with the right side. The results suggested that each meridian should have its own unique pathway in the limbs, and simple R-C circuits as discussed in the review Ref. 1 might not be applicable. Based on our model of soft-material waveguide, we presented a new vision for the 3D structure of meridian network.

关键词： meridian acupuncture points electrical conductance frequency spectrum limb angle softmaterial waveguide

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