Studies On The PSC (Propagated Sensation Along Channels) Of The 14 Channels

Cooperative Group of Illustrated Chart of the PSC, Anhui, Fujian, Shanxi and Liaoning

For the calibration of the old channel chart, in the past two years, we had a survey among 11,853 peasants in the Mengcheng District of Anhui province. We had discovered 550 individuals with marked propagated sensation along channels (PSC); recorded 3,494 lines of PSC drawn 26 charts of these PSC lines. We adopted the finger-pressing method. To check up the reliability of the finger-pressing method and the chief complaint of the persons being examined, stimulation with a current of low frequency impulse, point pressing needle and acupuncture were all adopted. In addition, PSC blocking method and pain tests along the inside and outside of the PSC lines were applied as side verifications. Among the 99 individual examinations, 26 charts were drawn line by line repeatedly. The heavy lines showed the relative majority of lines passing that region and they represented to be the chief lines in the channels. The duplication in the chief lines in the four limbs showed over-whelming majority; while those in the head, neck and the trunk showed only less majority.


Result:

(1) General distribution

The general tendency is that during point stimulation at each channel in the four limbs, the PSC lines show a relative concentration; while in the head, neck and trunk, the lines show a relative dispersion. Comparing with the old chart, the chief lines of PSC in the limbs coincide fundamentally with the old chart; partially coincide in the trunk and show greater difference in the head.

(2) Differences between the present lines and the old chart


The PSC lines in each channel proceed with natural smooth curves rather than twists or other complications. The Yin channels may run to the head. The propagation sensation on the back of the 2 Urinary Bladder Channels shows only a single line. The PSC lines of the Channels of Liver, Stomach and Spleen are seen to duplicate toward each other to form common lines.

(3) The general natures of the PSC lines

I. Symmetry

Most of PSC lines of the same channels on each side of the body are symmetrical.


II. Variability and variable symmetry

For variability, there are two sorts. One is the variation of sensitivity. The sensitivity may be strengthened or continuously reduced to zero. The other is the variation in direction. For example, in the same person, the PSC of the Lung Channels may reached the thorax in the first observation; while in the second time it may reach to the head. Such variation also showed a symmetrical change on both sides of the corresponding channels.


III. Overflow-phenomenon of the channels

That the PSC runs from one channel to the other channel lines is called the over-flow phenomenon of the channels. It is one of the important phenomena of the activities of the channels. It seems to be complicated, however most of the lines propagate  along the same side of the body. It shows that there are extensive connections between the PSC lines of different channels.

IV. Taxis

It shows that the PSC lines of the same side may pass through one point or run to a certain point. For example most of the PSC lines of the three Yin Channels together with the Gall Bladder and Stomach Channels run through Weidao, Chong-men and Qichung etc. Or most of the PSC lines from the upper and lower limbs pass through Quehpen, Jingmen, Fengchi etc.


Furthermore, a number of special PSC phenomena have been observed such as in one of the observed person who possesses a continuous propagation up and down for a long time after stimulation.

(4) The union of extensiveness and specificity

It seems as a whole that when the PSC lines enter the trunk, there happens to appear many pathways, showing the presence of extensive connections among these lines; but when each PSC line is generated from the stimulated point, it extends forward in a single line only, with very few bifurcating branches, showing the presence of speciality.


The above shows that based upon the observation of the present PSC lines, the old chart is only a diagramatic presentation of the channels. Our present study also gives a preliminary outline of the channels of the body, but it needs further intensive work to check for its validity.