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Table 1 This table shows the results of the electrophysiological study: Pattern Reversal-VEP initial amplitudes (N1P1 and P1N2, μV), and habituation slopes in healthy volunteers (HV) and episodic migraineurs (MoA), before, just after and 3 h after anodal tDCS

From: Transcranial Direct Current Stimulation (tDCS) of the visual cortex: a proof-of-concept study based on interictal electrophysiological abnormalities in migraine

Groups and VEP comparison First block amplitude (μV) Habituation slope (over six blocks)
  Before After + 3h Before After + 3h
Healthy volunteers       
(n=11)       
N1P1 6.1±2.0 6.8±2.6 6.3±2.2 -0.07±0.14 -0.21±0.14* -0.08±0.14
P1N2 6.6±2.1 6.5±2.0 6.0±1.6 -0.18±0.19 -0.14±0.16 -0.12±0.25
Episodic migraineurs       
(n=13)       
N1P1 7.1±2.9 7.3±3.1 7.2±2.7 -0.10±0.11 -0.24±0.18* -0.11±0.17
P1N2 6.6±2.6 6.4±2.9 6.8±2.5 -0.01±0.21 -0.17±0.24 -0.07±0.21
  1. The * mark corresponds to a significant change (p < 0.05).