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GV-18 Unyielding Space

强间 〔強間〕 qiáng jiān

Alternate names: 大羽 dà yǔ, Great Feather

Channel: GV, governing () vessel

Modern location: An acupoint located on the posterior aspect of the head, 1.5 cùn above the superior border of the external occipital protuberance (eop) on the midline.

Classical location: One cùn and five fēn directly above Brain’s Door (GV-17). From The Golden Mirror of Medicine (医宗金鑑 yī zōng jīn jiàn)

Local anatomy: See GV-17.

Action: Calms the liver and extinguishes wind; soothes the sinews and quickens the network vessel.

Modern indications: Headache; dizzy vision; stiff nape; mania and withdrawal.

Classical indications: Vomiting of foamy drool; epilepsy; tugging and slackening; pain and stiff nape; insomnia.

Needle stimulus: Needling: 0.2‒0.3 cùn backward transverse insertion. Moxa: 3‒5 cones; pole 5‒15 min.

Point name meaning:

The character (jiān) refers to the point’s location in a depression (space) between the occipital bone and the parietal bone, while (qiáng) may refer to either the hard, unyielding bone of the skull or the point’s use in the treatment of stiff neck. Thus the name is rendered as Unyielding Space.

If (qiáng) is taken as a reference to the point’s ability to strengthen the brain (treating epilepsy, headache, madness, and visual dizziness), then the name could be rendered as Strengthening Space.

The (qiáng) derives its meaning of strength from its radical (gōng), which represents the archer’s bow. When joined by a line, GV-17, GV-18 and GV-19 form a bow, with GV-18 in the middle. If we accept the assertion made by some sources that this reasoning accounts for the name, the rendering Center of the Bow would be appropriate. See acupoint names: origins, meanings, and translations.

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