The Kidney Primary Channel originates beneath the little toe. It connects to Zhiyin BL-67 of the Bladder Primary Channel and forms the Foot Yin-Yang circuit.
It then flows to Yongquan KID-1 under the foot sole and then Rangu KID-2 below the navicular tuberosity.
The Channel continues to Taixi KID-3 posterior to the medial malleolus, descends through the heel and then ascends to Zhaohai KID-6 below the medial malleolus.
It then penetrates the anus and connects to the Kidneys and the Bladder.
Continuing going up to Shenshu BL-23 around the spinous process of the second lumbar vertebra (L2), it then splits to two branches:
One branch follows the Girdling Vessel around the waist to the abdomen.
One branch continues ascending to the root of the tongue. It goes further to the nape of the neck and converge with the Bladder Primary Channel around Tianzhu BL-10.
Kidney Sinew Channel
Chinese: 足少阴经筋
Pinyin:Zú Shǎo Yīn Jīng Jīn
Pathway for Kidney Sinew Channel
The Kidney Sinew Channel originates beneath the little toe.
After crossing the foot sole diagonally, it connects to the Spleen Sinew Channel and binds at the medial malleolus.
A small branch travels to the calcaneus from there.
The main Sinew Channel ascends the posteromedial aspect of the leg and binds at the medial condyle of the tibia.
Crossing the Bladder Sinew Channel, it continues running up along the medial surface of the thigh and binds above the external genitalia around Zhongji REN-3 and Qugu REN-2, where it also connects to other Yin Sinew Channels.
Then an internal branch runs through the abdomen, ascending the spinal vertebrae all the way to the neck nape, where it connects to the Bladder Sinew Channel, around Tianzhu BL-10.
Kidney Luo-Connecting Vessel System
Chinese: 足少阴络脉
Pinyin:Zú Shǎo Yīn Luò Mài
Pathway for Kidney Luo-Connecting Vessel System
The Kidney Luo-Connecting Vessel separates from the Primary Channel at Dazhong KID-4, on the posterior aspect of the medial malleolus.
It curves around the heel and enters internally to connect with the Bladder Channel.
It then follows the Kidney Primary Channel to Shanzhong REN-17 in the middle of the two nipples.
Then the pathway goes internally. It runs through the chest to the spine and spreads in the lumber vertebrae.