Fig. 5

Acupuncture needle torque developed by skin tissue resistance against uni-directional rotation of the needle (total three times of rotation) were measured by using Acusensor®. Manipulation of deeply scraped needle (ACU200) significantly increased the torque as the rotation number increased. ^**p < 0.01 versus one time of rotation; ^#p < 0.05, ^##p < 0.01 versus ACU group