《黄帝内经·素问·皮部论》
手、足太阳经的诊法是一样的，诊察它上下分属部位所浮现的络脉，都是属于太阳的络。
上下同法，视其部中有浮络者，皆太阳之络也。
The method of diagnosing the Large Intestine Channel of Hand-Yangming and Large Intestine Channel of Foot-Yangming is the same; by diagnosing the superficial collateral channels that appear on its up-down related regions, they all belong the collaterals of the Large Intestine Channel.