Channel chart: Yang Heel Vessel, Chinese woodcut

Woodcut illustration, showing the path of yangqiao mai (Yang Heel Vessel), from Jingmai tu kao (Illustrated Study of the Channels), published in 1878 (4th year of the Guangxu period of the Qing dynasty). Yangqiao mai is one of the Eight Extraordinary Channels (qi jing ba mai). It originates at the shenmai (Extending Vessel) point at the outer side of the heel, and runs upwards along the outer ankle, the back of the calf and the outside of the thighs, hips and upper body, and along the neck to the corners of the mouth. It enters the inner canthus of the eye where it comes into confluence with the taiyang channel and yinqiao mai (Yin Heel Vessel), then ascends again to the top of the head where it joins the foot shaoyang channel. Pathological changes in this channel are commonly thought to provoke insomnia, pain in the eyes, etc.

Picture title: Chart showing the path of yangqiao mai (Yang Heel Vessel). Other lettering: It starts in the heel, emerges at the outer ankle, follows the outer part of the thigh, travels up inside the chest, enters the clavicular fossa (quepen, the Broken Basin), ascends to emerge in front of renying (Human Welcome), enters fengchi (the Wind Pool point, at the nape), joins at the inner canthus of the eye.