Fig. 2From: Effects of transcutaneous electrical nerve stimulation in the Management of Post-Injection Sciatic Pain in a non-randomized controlled clinical trial in Nnewi, NigeriaShowing the second tens electrode placement of on the same subject. The electrode was placed in such a way to cover the area of pain perception. Treatment lasted for 20 min and electrode placement was changed to reflect what is obtained in Fig. 3Back to article page