Fig. 2From: Evoked potentials after painful cutaneous electrical stimulation depict pain relief during a conditioned pain modulationTime course of PCES-pain (a) and PCES-EP-amplitude (b) in sequence A (firstly 24 °C cold water; then 10 °C cold water as conditioning stimulus) and B (firstly 10 °C cold water; then 24 °C cold water as conditioning stimulus)Back to article page