High risk of pneumothorax. Do not needle perpendicularly or deeply.
📍 Location (classical)
On the upper back, 3 cun lateral to the inferior border of the spinous process of the fifth thoracic vertebra (T5), at the level of BL-15 (Heart Shu point).
🧭 How to find it (practical)
Seated with the head flexed, locate the point below the spinous process of the fifth thoracic vertebra, 3 cun lateral to Shen Dao (GV-11).
🔬 Anatomy
Trapezius and rhomboid major muscles.
💉 Needling
Oblique insertion toward the spine, 0.3–0.5 cun.
📜 Etymology
Shen (神), mind; Tang (堂), hall. The Xin (Heart) houses the mind. The point lies at the level of Xin Shu (BL-15), as a hall where the mind dwells.
