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SI-4 Wrist Bone
腕骨 〔腕骨〕wàn gǔ
Channel: SI, Hand Greater Yáng (tài yáng) Small Intestine Channel
Modern location: An acupoint located on the ulnar aspect of the hand, in the depression between the base of the fifth metacarpal bone and the triquetral bone.
Classic location: On the outer side of the hand, in the depression by the prominent bone in front of the wrist. (Zhēn Jiǔ Dà Chéng)
Local anatomy: The posterior carpal artery (the branch of the ulnar artery), the dorsal venous network of the hand. The dorsal branch of the ulnar nerve.
Action: Courses greater yáng (tài yáng) channel evils; clears small intestinal damp-heat.
Modern indications: Headache; stiff nape;
Classic indications: Absence of sweating in febrile disease; throat impediment (hóu bì); nasal congestion;
Needle stimulus: Needling: 0.2‒0.5 cùn perpendicular insertion. Moxa: 3 cones; pole 5‒20 min.
Point groups: Source point (yuán xué).
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