Channel Pathways
The Large Intestine Meridian consists of multiple channel systems, each with its own pathway and clinical significance.
Pathway Description
The external pathway:
- The Large Intestine Primary Channel originates from Shangyang LI-1, at the radial aspect of the corner of the index finger nail. LI-1 connects to a Lung Primary Channel branch at Lieque LU-7.
- Running along the radial side of the index finger, it then passes between the first and second metacarpal bones at Hegu LI-4.
- It then runs through Yangxi LI-5 at the depression between the tendons of extensor pollicis longus and brevis.
- Afterwards, it ascends along the lateral aspect of the forearm and reaches Quchi LI-11 at the elbow.
- Continuing ascending along the lateral aspect of the upper arm, it arrives at Jianyu LI-15 of the shoulder joint.
- From there, it crosses the shoulder and reaches Jugu LI-16 at the depression between the scapular spine and the lateral extremity of the clavicle.
- Running in a medial direction, the Channel then passes through Bingfeng SI-12 in the center of the suprascapular fossa.
- It then arrives at Dazhui DU-14, which is below the 7th spinous process (C7) and also the meeting point for all other 5 Yang Channels.
- Finally, it crosses the shoulder and enters the supraclavicular fossa at Quepen ST-12.
The internal pathway:
- From ST-12, the Primary Channel goes internally.
- It descends through the Lungs, penetrates the diaphragm and finally arrives at the Large Intestine.
- According to some books, the internal Primary Channel continues descending to Shangjuxu ST-37 at the lateral aspect of the lower leg. This is the lower He-Sea point of the Large Intestine.
Branches:
- One external branch separates from Quepen ST-12, ascending along the lateral aspect of the neck. It then ascends the cheek, enters the lower gums and curves around the upper lip. After crossing Renzhong DU-26 at the philtrum, it goes to the opposite side of the face and ends at Yingxiang LI-20 next to the nose, which is also the connecting point with the Stomach Channel.