Transcranial direct current stimulation (tDCS) is a non-invasive neuromodulatory technique that can reduce pain. Its side effects are milder than those of pharmacological treatments, and its analgesic effect on chronic pain has been demonstrated. In this study we investigated 1) the effects of anodal tDCS on pain intensity and threshold, 2) the placebo component of tDCS analgesic effect, and 3) ...