Fig. 3From: Attenuated alpha oscillation and hyperresponsiveness reveals impaired perceptual learning in migraineursGrand mean (collapsed across all electrodes) time-frequency representation of power and topography of the alpha-band power differences (migraine - control) for the highlighted interval. The electrodes with the maximum effect over the period [−1.6 to 0.2] were highlighted with an asterisk (*)Back to article page