“Wei” originally meant to flex or to bend, and here it refers to the popliteal fossa. “Zhong” means centre. When locating the point, the patient is asked to flex the knee to such an extent where a depression appears in the centre of the popliteal fossa. The point lies in the depression, hence the name “Weizhong” (Popliteal Centre). This point is also sometimes called Weizhongyang.
At the midpoint of the transverse crease of the popliteal fossa, between the tendons of musculus biceps femoris and musculus semitendinosus. Some books record a new point 2 cun above Weizhong (BL40), called Weishang (Upper Popliteal).
Lower back pain.
Sciatica and paralysis of the lower extremities (combine with Shenshu (BL23), Guanyuanshu (BL26), Huantiao (GB30), Zusanli (ST36) and Sanyinjiao (SP6)).
Rheumatalgia of the lower extremities.
Acute vomiting and diarrhea.
Contraction of the calf muscle.
Disorders of the lower back.
Activate the collaterals.
Relax the tendons.
Strengthen the lower back and knees.
Stop vomiting and diarrhea.