This trial is designed to preliminary evaluate the efficacy and safety of NIBS system for evaluation and treatment of neuropathic pain. The NIBS system evaluates brain neuronal network activity and customizes a personalized treatment utilizing low current non invasive brain stimulation technology for neuropathic pain with central component. this is single meeting trial which includes brain activity evaluation and a single treatment and sham treatment. The goal of the study is to evaluate the central brain component of neuropathic pain subjects, and the effect of conventional tDCS treatment.