Fig. 5.
Effects of lead position on kilohertz frequency spinal cord stimulation activation thresholds. (A) Minimum dorsal column (DC) and dorsal root (DR) fiber activation thresholds as a function of the distance between the dorsal surface of the dura and the spinal cord stimulation lead. Activation thresholds were calculated at distances of 0.0, 0.2, 0.4, 0.8, and 1.2 mm. (B) Minimum DC and DR fiber activation thresholds as a function of distance between the spinal cord midline and the center of the spinal cord stimulation lead. Activation thresholds were calculated at distances of 0.0, 1.0, 2.0, and 3.0 mm. In this analysis, DC fibers had a diameter of 11.5 μm.