Fig. 2From: Machine learning and EEG can classify passive viewing of discrete categories of visual stimuli but not the observation of painAverage ERP waveforms and scalp isopotential maps for each comparison from the unique 91 subjects within samples one and two. A Brain responses to scene and face images. Left: Average ERP waveforms from electrodes 58 (P7) and 96 (P8) for each condition. Right: Average scalp potential for each condition between 150 and 190 ms. B Brain responses to neutral and pain scenes. Left: Average ERP waveforms from electrodes Cz, 55, and 62 (Pz). Right: Average scalp potential between 524 and 674 ms for each condition. (C) Brain responses to neutral and pain face images. Left: Average ERP waveforms at electrodes Cz, 55, and 62 (Pz). Right: Average scalp potential between 270 and 348 ms for each condition. White circles indicate electrode locations of the average ERP waveforms. Light grey bars denote significant differences at p < .05. Dark grey bars represent significant differences at p < .00001Back to article page