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Credit
Chinese/Japanese Pulse Image chart: Yang Heel Vessel. Wellcome Collection. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.
Illustration of Yang Heel Vessel (pulse) from Renyuan maiying guizhi tushuo (Pictorial Handbook of Pulse Images Based on the Person). This is a specialist text on pulse diagnosis attributed to the third-century master Shuhe, edited and revised by Shen Jifen in the Ming period (1368-1644). It discusses various pulse images and the medical conditions to which they relate, and contains 48 pulse image diagrams. This undated edition was engraved and published in Japan.
The text states: Yang Heel Vessel (yangqiao mai) originates in the middle of the heel and runs upwards via the outer ankle, entering at the hairline at the back of the head. Its pulse image is like a writhing snake. Illnesses related to Yang Heel Vessel are clonic convulsions (chizong), difficulty in urination or anuria (longbi), swollen feet and weakness, etc.