Table 2 Latencies (in milliseconds) and amplitudes (μV) of VEPs in migraine patients’ groups undergoing real or sham transcranial direct current stimulation (tDCS) before and after intervention
Electrophysiological parameters | Real (n = 18) |  | Sham (n = 18) |  |
|---|---|---|---|---|
| Â | Before | After | Before | After |
N1 | 80.3 ± 5.7 | 78.9 ± 6.4 | 78.4 ± 2.0 | 78.5 ± 3.1 |
P1 | 105.5 ± 6.1 | 105.2 ± 5.8 | 105.1 ± 4.3 | 106.7 ± 4.7 |
N2 | 146.1 ± 8.9 | 146.9 ± 9.7 | 150.7 ± 6.7 | 151.1 ± 6.8 |
N1-P1 1st amplitude block (μV) | 8.3 ± 3.1 | 8.9 ± 3.6 | 7.2 ± 2.7 | 6.7 ± 2.4 |
N1-P1 amplitude slope | 0.112 ± 0.315 | - 0.236 ± 0.339 ** | 0.059 ± 0.241 | 0.038 ± 0.182 |
P1-N2 1st amplitude block (μV) | 8.3 ± 3.1 | 8.9 ± 4.2 | 6.4 ± 3.4 | 6.3 ± 2.9 |
P1-N2 amplitude slope | 0.055 ± 0.507 | - 0.345 ± 0.569 | 0.039 ± 0.272 | - 0.001 ± 0.269 |