Applying electrical impulse stimuli at the Jing point and then tapping on the skin surface along the vertical lines of the channel of lung

the line of latent propagated sensation along channel (LPSC) was determined on 100 patients at acupuncture clinic. of the cases examined

93% were fou- nd to bear positive LPSC line which is basically coincident with the classi- cal channel of lung. Based on its high localizibility

the line of LPSC on the section of upper arm was found at one centimeter or so by the inner side of the contemporary classical channel chart of lung.