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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.

Classical location: One cùn in front of the inner anklebone, in the depression between the sinews. From The Great Compendium of Acupuncture and Moxibustion (针灸大成 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.

Classical 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.

Point name meaning:

• 中 zhōng: center, central, middle (also zhòng, to strike)
• 封 fēng: mound, heap; to seal, to block

The character 中 (zhōng) is a reminder that the point is located in the middle of the two sinews, while 封 (fēng) may be a reference to both the mound of flesh formed by the sinews and the fact that the point is sealed within the sinews. Mound Center and Sealed Center are therefore both acceptable translations of this name. See acupoint names: origins, meanings, and translations.

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