Cortical evoked potentials used for placement of a laminotomy lead array: a case report.

Objective: We describe a technique for placement of a cervical spinal cord electrode under general anesthesia using the contacts as cortical evoked potential stimulating electrodes. Methods: A 37-year-old man required revision of the percutaneous lead of a spinal cord stimulator system placed for right upper extremity pain. A Resume-TL (R) laminotomy lead was inserted at the C5-6 interspace in the prone position under general anesthesia. The contacts were functionally over the right dorsal column by evoked potential recording, despite the apparent midline position of the lead. Results: Postoperatively, the patient had excellent coverage and pain relief at the right shoulder and extremity. There was no stimulation perceived on the left side of the body. Conclusion: This technique allows for intraoperative testing under general anesthesia in laminotomy lead placement to localize the optimal position of the lead.