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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; eye screens; jaundice; malarial disease; febrile disease; hypertonicity of the fingers; wrist pain.

Classic indications: Absence of sweating in febrile disease; throat impediment (hóu bì); nasal congestion; sniveling and nosebleed; dispersion-thirst; hypertonicity of the finger; pain in the forearm; weak aching wrist.

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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