Figure 4: Average waveforms and topographical plots.
From: EEG, behavioural and physiological recordings following a painful procedure in human neonates

Group average waveforms at Cz and corresponding topographic maps for each ERP following heel lance (top), sham control (middle), and auditory control (bottom) stimulation. Stimulus onset at 0 ms is marked by the vertical black dashed line. Standard deviation is represented by the grey dashed lines.