0.5–1 cun strictly vertically to the skin or obliquely in an inferior direction, with the patient’s back straight or flexed in order to avoid puncturing the spinal canal.
Oblique insertions should only be carried out by experienced practitioners, as in small persons, irrespective of their body weight, the spinal canal may be reached after only 1.25 cun.
The Liver controls the sinews and the upstirring Liver Wind is responsible for various disorders such as abnormal movement, muscle spasms, spine stiffness or contraction, tremor and epilepsy. Jinsuo is translated to 'Sinew contraction' or ‘Tendon spasm’ in Chinese. It is most used for soothes the Liver and pacifies the internal Wind so as to relieve spasm.