Spinal Cord Corticospinal Tract

Use same protocol as dorsal column mapping, stimulate within spinal cord as tumor is being removed but at low intensity, 1 mA. assuming same calibration holds within spinal cord as for subcortical CST, response at 1 mA = 1 mm from CST, prudent to halt further diessection at this site. Best way to accomplish this may be with electrified Frazier suction.