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SP-8 Earth's Crux
地机 〔地機〕dì jī
Alternate names: 地箕 dì jī, Earth Winnower; 脾舍 pí shè, Spleen Abode
Channel: SP, Foot Greater Yīn (tài yīn) Spleen Channel
Modern location: An acupoint located on the medial aspect of the lower leg, slightly behind the posterior edge of the tibia, 3 cùn inferior to SP-9 on the line connecting the medial malleolus and SP-9.
Classic location: In the depression by the bone five cùn above Leaking Valley (SP-7) and five cùn below the knee on the inner side. The point is found with the leg outstretched. (Zhēn Jiǔ Dà Chéng)
Local anatomy: Anteriorly, the great saphenous vein and branch of the genu suprema artery; deeper, the posterior tibial artery and vein. Superficially, the medial crural cutaneous nerve; deeper, in the posterior aspect, the tibial nerve.
Action: Harmonizes the spleen and rectifies the blood; harmonizes the uterus.
Modern indications: Abdominal distension; diarrhea; inhibited urination; water swelling; menstrual irregularities; menstrual pain; seminal emission.
Classic indications: Qì distension of the abdomen and rib-side; no desire to eat; inhibited urination; visceral impediment (zàng bì);
Needle stimulus: Needling: 0.3‒1.0 cùn perpendicular insertion. Moxa: 3 cones; pole 5‒10 min.
Point groups: Cleft point (xī xué) of the spleen channel.
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