[Location] Localized in the erect sitting position, with the palm upwards, on the palmar aspect of the forearm, the point is on the radial side of the tendon of m. flexor carpi ulnaris, 1.0 cun above the transverse crease of the wrist. ( Fig.9 )
 
[Regional Anatomy] Skin→subcutaneous tissue→between the flexor carpi radialis and the flexor digitorum superficialis→flexor digitorum profundus→pronator quadratus. Superficial layer, the medial antebrachial cutaneous nerve, and the subordinatial branches of the basilis vein; deep layer, the ulnar artery and vein. and the ulnar nerve.