Figure 3
From: Pre-motor versus motor cerebral cortex neuromodulation for chronic neuropathic pain
Pain reduction effect of chronic subdural cortex stimulation. Reduction of pain with chronic subdural cortical stimulation presented here in three groups, based on electrodes location. 1st group: patients 1–6 with permanent grid implantation over both premotor and motor cortex; 2nd group: patients 7–8 with permanent grid implanted over premotor cortex; 3rd group: patient 9 for whom permanent grid implanted over motor, premotor and sensory cortex. Pie charts illustrate proportion of electrodes over particular cortex area. Line charts represent variation of pain level in patients after permanent grid implantation. PO—preoperation pain level; PI—permanent grid post-implantation pain level (PI1- within 2 weeks after permanent grid implantation; PI2—pain level during 6 months to 1-year period of observation).
