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GB-21 Shoulder Well
肩井 〔肩井〕jiān jǐng
Alternate names: 膊井 bó jǐng, Shoulder Well
Channel: GB, Foot Lesser Yáng (shào yáng) Gallbladder Channel
Modern location: An acupoint located on the superior aspect of the shoulder, midway between the seventh cervical vertebra and the high point of the acromioclavicular articulation.
Classic location: In the depression above Empty Basin (ST-12), in front of the great bone. (Zhēn Jiǔ Jiǎ Yǐ Jīng)
Local anatomy: The transverse cervical artery and vein. The lateral branch of the supraclavicular nerve, the accessory nerve.
Action: Frees the channels and quickens the network vessels; sweeps phlegm and opens the orifices.
Modern indications:
Classic indications: Dizziness; heat effusion with aversion to cold; reversal cold of the limbs;
Needle stimulus: Needling: 0.5 cùn perpendicular insertion. Moxa: 3‒7 cones; pole 10‒30 min.
Warning: Needling of this point is contraindicated during pregnancy since it may cause abortion.
Point groups: Intersection point (jiāo huì xué) of the hand and foot lesser yáng (shào yáng) channels (TB and GB) and the yáng linking vessel (yáng wéi mài).
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