Spinal Cord Stimulation Research Study

Inclusion Criteria: * Be ambulatory * Be 18 years of age or older * Have chronic low back pain and/or leg pain due to neuropathic causes * Be implanted with the Restore or Restore Advanced system for greater than or equal to 3 months * Be implanted with percutaneous thoracic leads * Have stable pain control * Adjust stimulation parameters manually on a regular basis * Be willing and able to complete protocol requirements * Be willing and able to provide written informed consent * Be male or nonpregnant female Exclusion Criteria: * Plan to enroll in another clinical study during participation in this study, or currently enrolled in another clinical study * Be morbidly obese * Had pain-related surgery in the previous 12 weeks of enrollment or intend to undergo surgery during the period of the study