A Study to Investigate High-density Spinal Cord Stimulation in Virgin-back Patients

* Male and female patients between 18-75 years of age who have lumbar radiculopathy who have not undergone any spinal surgery. * Patients with intractable neuropathic pain due to undergo Percutaneous Spinal Cord Stimulation as part of their standard treatment for lumbar neuropathic pain as per NICE HTA guidance 159 at Barts Health NHS Hospitals. The decision would be made by the multidisciplinary team by reviewing the history, MRI scans and patient choice. * Patients who have given their written informed consent. * Female patients of childbearing potential must be using adequate contraception (i.e. using oral or IM contraception or an IUCD) and must have a negative urine pregnancy test. Exclusion Criteria: * Patients with diabetes or any underlying neurological condition. * Patients known to have a condition that in the investigator's judgement precludes participation in the study. * Patients who have received an investigational drug or have used an investigational device in the 30 days preceding study entry. * Patients unable to comply with the study assessments and to complete the questionnaires.