The Yin–Yang Principle in Asian Philosophy and Medicine: An Essay with Experimental Insights from the Apparatus for Meridian Identification (AMI)

Abstract

The relationship between Yin and Yang is the foundation of Asian philosophy and medicine: The nature, change, and interplay of these two cosmic polarities have been investigated in the East since ancient times. Today, modern science can shed light on the mystery of the Yin–Yang principle, revealing the secrets and dynamics of this universal balance. In a previous work, the Apparatus for Meridian Identification (AMI), which is an acupoint electrodermal device, was used to assess the energy state of the Yin and Yang meridians of 100 healthy subjects. The results confirmed traditional Asian knowledge, according to which health is characterized by a higher energy activity of the Yin meridians compared with their Yang partners. This essay synthesizes classical and contemporary literature on the Yin–Yang principle in Asian culture, integrating past theoretical knowledge with modern empirical findings. Drawing from traditional Chinese, Taoist, and Japanese texts, as well as from modern interpretations, this article demonstrates that the AMI measurements from a previous experiment align with longstanding concepts of a relative energy predominance of Yin over Yang. This and other asymmetries seem to be inherent in the structure of the Universe, a premise for the development of life, and a prerequisite for the maintenance of health. In conclusion, the bioelectricity of acupuncture points appears to reflect the intrinsic order of the Universe.