fig4

Figure 4. Surgical Approach. Left: Neural interface. Electrode A is an active electrode capable of delivering sensory stimulation signals. Electrode B is an active electrode, which detects sensory stimulation delivered by Electrode A. Electrode C is a stabilizing electrode. Ruler in image 1 measures millimeters. Right: Image of surgical dissection, as described in text. Electrode A is intramedullary in this photo. Electrode C is not included in this surgical demonstration. Ruler in image 2 measures centimeters.