Fig. 2.

Comparison of flinching number between groups. The formalin-induced paw flinching number was divided into two phases (early phase, 0~10 min; late phase, 10~60 min). Experimental groups were classified as follows: formalin-only (formalin-injection only); ST36-For (manual acupuncture treatment at ST36 before formalin injection); SP9-For (manual acupuncture treatment at SP9 before formalin injection); BL60-For (manual acupuncture treatment at BL60 before formalin injection); NA-For (manual acupuncture treatment at a non-acupoint before formalin injection). In the early phase, there was no marked change between any groups. In the late phase, however, the BL60-For group had a significantly suppressed paw-flinching number induced by the intraplantar formalin injection. Each bar represents the group mean±SEM (^*p<0.05, one-way ANOVA followed by Dunnett's post-hoc multiple comparison).