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BL-38 Superficial Cleft
浮郄 〔浮郄〕fú xī
Alternate names: BL-52
Channel: BL, Foot Greater Yáng (tài yáng) Bladder Channel
Modern location: An acupoint located on the posterior aspect of the thigh, 1 cùn superior to the lateral end of the popliteal crease, on the medial side of the biceps femoris tendon.
Classic location: One cùn above Bend Yáng (BL-39). The point is found with the knee flexed. (Zhēn Jiǔ Dà Chéng)
Local anatomy: The superolateral genicular artery and vein. The posterior femoral cutaneous nerve and the common peroneal nerve.
Action: Soothes the sinews and quickens the network vessels; quickens the blood and relieves pain; clears and disinhibits the lower burner.
Modern indications: Constipation; pain or numbness and tingling in the thigh or the back of the knee (popliteal fossa).
Classic indications: Small intestinal heat; large intestinal bind; tension in the outer thigh.
Needle stimulus: Needling: 0.5‒1.0 cùn perpendicular insertion. Moxa: 3‒7 cones; pole 5‒10 min.
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