Figure 6From: Standardizing therapeutic parameters of acupuncture for pain suppression in rats: preliminary study Sequential pain responses in the formalin test related to needle diameter. The needle was inserted 5 minutes after pain induction. The black bar labeled "Acupuncture" indicates the 5 minute time interval during which the 3 minute treatment occurred for all mice. All data are presented as mean ± SE. *p < 0.05 and **p < 0.01 when compared to the control group.Back to article page