Figure 1From: Transcranial Direct Current Stimulation (tDCS) of the visual cortex: a proof-of-concept study based on interictal electrophysiological abnormalities in migraine The time-dependent changes of N1P1 and P1N2 components of visual evoked potentials in a healthy subject. Over six blocks of 100 averaged single trial responses a reduction in amplitude of both components is shown, in the representative example.Back to article page