Any point at which two or more channels intersect. Intersection points have the ability to transmit a stimulus through both or all channels that intersect at the point.
Patterns
Application: Intersection points are used to treat disease affecting two or more of the intersecting channels. SP-6 (Three Yīn Intersection, 三阴交 sān yīn jiāo), for example, is often used to treat diseases that affect any or all of the three yīn channels of the foot because it is the intersection point of the liver, spleen, and kidney. Genitourinary diseases can be treated with point formulas that include CV-3 (Central Pole, 中极 zhōng jí) because that point is the intersection point of the three leg yīn channels and the controlling vessel, all of which are intimately connected with the genitourinary region.