Figure 4
Schema illustrating the recording of motion-onset visual evoked potentials (M-VEPs) from the right eye fixating the red cross (left from the pattern) in patient #8. Such was the way the crossed fibers were examined. Active electrodes (O1, Oz, O2 and Pz) and the reference electrode (A2) were placed according to the 10–20 electroencephalographic system. The different wave forms represent preoperative (red line) and different postoperative (at 1 week, 3 months and 6 months) M-VEPs in PZ–A2 (a). Distribution of the N160 amplitude in M-VEPs between patients with grade of compression 0–1 and 2–4. The grade was not a significant factor (p = 0.696). For the description of the boxplot parameters, see the legend of Fig. 1b (b).
