According to the traditional Chinese theory each Yang Meridian (Large Intestine , Stomach , Small Intestine , Urinary Bladder , Sanjiao , Gall Bladder) has a related Yin Meridian (Lung , Spleen , Heart , Kidney , Pericardium and Liver).
Yang Meridians are distributed externally while Yin Meridians are distributed internally. Thus there are six couples of Meridians which are spread in parallel (exteriorly - interiorly related Meridians).
The Luo point is located proximal to the Yuan point and it doesn't belong to the Five Shu Points , but is a special point category.
From there , starts the transverse Luo vessel which ends at the Yuan point of the coupled Meridian.The longitudinal Luo vessel starts from the Luo point and running parallel to the Meridian ends directly to the channel's internal Zang or Fu organ.
When a channel is diseased , we can puncture the Yuan point of the affected Meridian and the Luo point of its exteriorly - interiorly related channel.
|MERIDIAN||YUAN POINT||LUO POINT|