[Development and significance of theory on yang meridians]

The theory on yang meridians was reviewed from the aspect of intellectual history. It is held that the significant change of the relation between yang meridians and zang-fu organs influenced the theory and the sense of yang meridians. The comprehension on yang meridians closely related with the understanding on the whole classic theory of meridian. And the knowledge on features of meridians would finally affect the proper understanding of differentiation of syndromes according to meridians and collaterals. From the view of point, new comprehensions are proposed including the interior and exterior relations of meridians, relations between meridians and zang-fu organs, specialty of differentiation of syndromes according to meridians and collaterals, syndromes of yang meridians and changing of the indications of acupoints.