Knowledge Base/Acupoints/Jianzhen
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SI9 · 手太阳小肠经

Jianzhen jiān zhēn · 肩贞

Location. On the shoulder girdle, posteroinferior to the shoulder joint; with the arm adducted against the trunk, 1 cun superior to the posterior end of the axillary fold.

The first point of the meridian to reach the shoulder girdle. The name is read as "shoulder steadfastness" — classical point names on this part of the body frequently describe the place rather than any use.

定位。在肩胛区,肩关节后下方,臂内收时,腋后纹头直上 1 寸。

小肠经循行至肩部的第一穴。穴名解作「肩之贞固」,与古典穴名多以部位与形态命名的习惯一致。

Classical record · not a treatment recommendation. Needling technique is a licensed practitioner's skill and is out of scope here.
This point lies next to the shoulder joint capsule and the brachial plexus passes close to the axillary fold. Depth and angle are a practitioner judgement; it is not a point for self-treatment.

Other points on the Hand Taiyang Small Intestine

18 related entries.

HouxiSI3 · 后溪YanglaoSI6 · 养老TianzongSI11 · 天宗TinggongSI19 · 听宫WanguSI4 · 腕骨XiaohaiSI8 · 小海ShaozeSI1 · 少泽QianguSI2 · 前谷YangguSI5 · 阳谷ZhizhengSI7 · 支正NaoshuSI10 · 臑俞BingfengSI12 · 秉风QuyuanSI13 · 曲垣JianwaishuSI14 · 肩外俞JianzhongshuSI15 · 肩中俞TianchuangSI16 · 天窗TianrongSI17 · 天容QuanliaoSI18 · 颧髎

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