Fig 2 -

Grand average ERPs and difference waves for central orientation (A) and contrast (B) stimuli. ERPs for standard (green), deviant (orange), and control (purple) trials at the left (L), midline (M), and right (R) parieto-occipital (PO) regions. The lighter green and purple around the deviant-minus-standard (dashed purple) and deviant-minus-control (dashed green) difference wave, respectively, show the 95% confidence interval. Typical PO ERP components are shown at the R PO region of interest (ROI).