On the lateral aspect of the upper arm, 3 cun proximal to LI-11, on the line connecting LI-11 and LI-15.
🧭 How to find it (practical)
With the elbow flexed, locate the point 3 cun directly above Qu Chi (LI-11), on the lateral aspect of the triceps brachii tendon.
🔬 Anatomy
Lateral border of the brachialis and triceps brachii muscles. Innervated by the posterior cutaneous nerve of the arm and the radial nerve.
💉 Needling
Perpendicular insertion, 0.5–1.0 cun.
📜 Etymology
Shou (手), arm; Wu (五), five; Li (里), considered as cun in ancient times. The point lies on the lower portion of the upper arm, 5 cun below Tian Fu (LU-3).
