[Location] Localized in the prone position. On the back. 1.5 cun lateral to the lower border of the spinous process of the eleventh thoracic vertebra. (Fig.61)
 
[Regional Anatomy] Skin→subcutaneous tissue→the latissimus dorsi→the inferior serratus posterior→the erector spinae. Superficial layer, the distribution of the cutaneous branches of the posterior rami of the eleventh and twelfth thoracic nerves, and the artery and vein along with them; deep layer, there are the muscular branch of the posterior branches or the 11th and 12th thoracic nerve and the branches or tributaries of the related intercostals and infracostal arteries and viens.