Paired Acute Invasive/Non-invasive Stimulation Trial

Inclusion Criteria: * Patients who are willing and able to give consent to the study. * Male or Female, aged 18 years or above with diagnoses of chronic pain. * Treatment includes Spinal Cord Stimulation, Dorsal Root Ganglion stimulation, or peripheral analgesic stimulation. Exclusion Criteria: * Patients who do not wish to be in the study. * Patients with metallic intracranial implants. * Patients with extreme language barrier that cannot understand the purpose of the study despite the use of an interpreter