Does Acupuncture Needling Induce Analgesic Effects Comparable to Diffuse Noxious Inhibitory Controls?

Figure 2

Comparison of pain threshold elevation at the end of acupuncture, NPSA, and DNIC test. PPDT: pressure pain detection threshold, NPSA: nonpenetrating sham acupuncture, DNIC: diffuse noxious inhibitory control. Acupuncture and NPSA are significantly different from DNIC test at 0 and 2 minutes. ^§𝑃<0.001, *𝑃<0.001, ⁺𝑃=0.05, ^#𝑃<0.001.