We invented to clarify the influences of acupuncture on the regional skin electroconductivity on humans. An acupuncture needle in situ for a certain time or electroacupuncture using DC 12 volt, 200μA for 7 sec. was applied on the forearm.
Measurements of skin electroconductivity were done on several representative points which were distal or proximal to the acupuncture periodically.
A needle in situ and electroacupuncture on LI4 did not change the electroconductvity of the proximal skin area around the elbow level on the same extremity.
A needle in situ on LI11 increased electroconductivity of the regional skin on the distal area around Manus dorsalis.
Electroacupuncture on LI11 increased electroconductivity of the skin on LI5.
A needle in situ on LI7 did not change electroconductivity of the skin on the proximal elbow level, but significantly decreased electroconductivity of the skin on LU9.

We investigated changes of the amperage on the dorsalis by the hand acupuncture under the condition of DC 12 volt, 200uA when both electrodes are connected.
(Method) We leaved a stainless steel needle, 25mm lenght and 0.26mm in diameter, on the first lumbar and thigh region point of 16 healthy adults for 10min. 2×2cm aluminum foil coated with keratin cream was used as a elcectrode for the measurement. We measured in pre-practice, post-practice, 10min, 20min, and 30min. The measurement velues in every time were examined by means principal component analysis.
(Results) Acupuncture stimulation on the first lumbar and thigh region point showed the tendency of operation upon the symmetric L4resion.

According to the Ryodoraku autonomic nervous system therapy the average of the measurement values on Ryodo points (acupuncture point) which belong to the Ryodoraku (meridian) can be obtained from the measurement value on the representative point of the Ryodoraku.
They are judged relative excitement which corresponds to “excitement and suppression” (fullness and emptiness) in proportion as to the relative position on Ryodoraku chart.
We got the result that the knee joint pain relates to the excitement of H₂, the suppression of F₁, and the suppression of F₄.