Neurophysiological Evidence for a Compensatory Activity during a Simple Oddball Task in Adolescents with Type 1 Diabetes Mellitus

Figure 2

ERP and VEP grand averages in patients and controls. The patient and control grand average ERPs are plotted as the thick and thin lines, respectively; the between-group ERP difference is the gray area in the whole figure. The two horizontal gray lines show the level of variability, pointwise calculated as the mean plus 2.5 times the standard deviation of values in the first 60 ms for ERPs and 30 ms for VEPs. The first row depicts ERPs to target (left plot) and nontarget (right plot) stimuli in the oddball cognitive task, evaluated from the parietal derivation. The second row shows the cumulative distribution function of pressing the response button—the reaction time in response to the target stimulus. The pattern-reversal VEP PR-VEP 40 (left plot) and PR-VEP 20 (right plot), recorded in the central occipital derivation, are shown in the third row; motion-onset VEPs from the periphery (M-VEP 20°, left plot) and the central visual field (M-VEP C8°, right plot), recorded from the parietal derivation, are shown in the fourth row.