The distance between the center of patella and tip of lateral malleolus is 16 cun. When the middle finger is flexed is flexed, the distance between the two ends of the creases of the interphalangeal joints is taken as one cun. Points that pertain to the same channel have properties in common. The therapeutic properties of the points are also based on their locations. Points located on the extremities can be used in treating disorders of both the extremities and the remote areas supplied by their pertaining channels, while points of the head, face and trunk are chiefly used in treating disorders in that area, including those of the zang-fu organs.
Theses refer to the points located on the four extremities.
The therapeutic properties of the points on the trunk may be judged according to their locations and their adjacent zang-fu organs. In acupuncture, the human body is generally divided into the upper, middle and lower portions. Points of the head, face and neck as well as those of the Ren and Du Channels are not only indicated in diseases of the neighboring organs, but also in constitutional symptoms. Indications of points on the extremities with relation to channels. The Kidney Channel of Foot-Shaoyin Disorders of kidney, intestines, lung and Throat Indications of points on the head, face and trunk with relation to locations.