Page 29 - Study Report_PH Amila Nishani Piyasingha

Theory of Diagnosis Principles for prevention and treatment

The theory of Yin-Yang

Yin and Yang are two aspects of the unity of opposite things. Initially yin
and yang refer to the light and darkness of the sun light, anything that is

exposed to the sun belongs to yang and that which is the south side of

unexposed to the sun belongs to yin. The major concepts of yin-yang
doctrine may be summarized by the following four aspects. They are

opposition of Yin- yang, interdependence of Yin Yang, wax wane of Yin-

Yang, transformation of Yin Yang.

The theory of Five Elements

Ancient TCM practitioners used the five elements to study and classify

tissues stature physiology and pathology of the human body and nature.
They also categorized things into wood fire earth metal water. The five

elements doctrine has been used in TCM to explain physiological and
pathological changes in human body, and the relation of the body to

the environment.

Theory of Visceral manifestation.

TCM classifies the internal organs of the body into three kinds, the five

zang viscera, or the heart, liver, lung and kidney, all of which have the
common physiological function of producing and storing essential qi.

The six fu-viscera, or the gallbladder, stomach, small intestine, large

intestine, urinary bladder and san-jiao, have the common physiological
functions of receiving, transforming, and transporting food and water.

The extraordinary fu-viscera include the brain, marrow bone, vessel,
gallbladder and uterus, and are distinct from the fu-viscera in function,

and are thus known as the extraordinary fu-viscer.