RecruitingDevice studyLocal Cerebral Oxygenation in Chronic Pain Patients Utilizing Spinal Cord StimulationThe primary objective of the study is to determine changes in cerebral nociceptive hemodynamic response (blood oxygenation/flow) before, during and following spinal cord stimulation (SCS). Objective measurements of cerebral nociceptive hemodynamic responses will be obtained with the CereVu sensor and ROPA system and will be analyzed offline and compared against subjective measures of pain. Proprietary analysis algorithms will be incorporated and developed to understand how the objective measurements correlate with subject reported pain levels