Deep insertion can perforate the peritoneal cavity.
📍 Location (classical)
On the upper abdomen, 2 cun lateral to the anterior midline, 4 cun above the umbilicus (level of CV-12).
🧭 How to find it (practical)
Supine, locate the point 4 cun above the umbilicus and 2 cun lateral to the anterior midline.
🔬 Anatomy
Rectus abdominis muscle and its sheath. Innervated by the 7th and 8th intercostal nerves. Superior epigastric artery and vein.
💉 Needling
Perpendicular insertion 0.8–1.0 cun.
📜 Etymology
Liang (梁), grain or food; Men (门), gate. The point lies in the upper epigastric region, which is the gate for the passage of food into the Wei (Stomach).
