《黄帝内经·素问·热论》
足太阳膀胱经连于风府穴，所以足太阳为诸阳主气，主一身之表。
其脉连于风府，故为诸阳主气也。
The foot sun bladder meridian is connected to the Fengfu acupoint, so the foot sun meridian is the main qi of all the yang meridians and controls the exterior of the body.