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LR-4 Mound Center

中封 〔中封〕zhōng fēng

Alternate names: 悬泉 xuán quán, Suspended Spring

Channel: LR, Foot Reverting Yīn (jué yīn) Liver Channel

Modern location: An acupoint located at the ankle joint, about 1 cùn anterior to the medial malleolus, in the depression on the medial side of the tibialis anterior tendon.

Classic location: One cùn in front of the inner anklebone, in the depression between the sinews. (Zhēn Jiǔ Dà Chéng)

Local anatomy: The dorsal venous network of the foot and the anterior medial malleolar artery. The branch of the medial dorsal cutaneous nerve of the foot and the saphenous nerve.

Action: Courses the liver and frees the network vessels.

Modern indications: Mounting qì (shàn qì, inguinal hernia); seminal emission; inhibited urination; abdominal pain.

Classic indications: Retracted genitals into the smaller abdomen and associated pain; the five stranguries; difficult urination; cold mounting (hán shàn); lumbar pain; no pleasure in eating; genital pain.

Needle stimulus: Needling: 0.3 cùn downward oblique or perpendicular insertion. Moxa: 3 cones; pole 5‒15 min.

Needle sensation: Localized numbness and distension.

Point groups: River (jīng) (metal) point.

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