In order to clarify the physiological nature of the local differences in the skin electroconductivity we measured transcutaneous electric current on the representative (determinate) points of Ryodo-Raku (by Y. Nakatani) which correspond to so-called Genketu of traditional Chinese medicine with a wet electrode of 1cm in diameter in the condition of D. C. 12 volts and 200 uA when, both electrodes are directly connected. Eighty-two healthy adults were tested once and four other healthy adults were tested daily for eight days. We analysed mathematically the values of measurements by the principal component analysis.
As a result, we found that the electroconductivity of the skin in the upper and lower limbs both, and volar and dorsal sites of the upper limb changed independently each other and showed from rough to close interrelations according to the orders as above-mentioned.