Table 3 Grand-average somatosensory evoked potentials (SSEPs) latencies and amplitudes in migraine patients’ groups undergoing real or sham transcranial direct current stimulation (tDCS) before and after intervention

9.5 ± 0.6

9.7 ± 0.8

9.5 ± 0.6

9.6 ± 0.6

13.2 ± 0.8

13.3 ± 0.8

13.1 ± 0.7

13.2 ± 0.7

18.8 ± 0.9

19.0 ± 0.8

18.6 ± 1.1

18.8 ± 1.1

23.6 ± 2.2

23.9 ± 2.1

22.9 ± 2.2

23.2 ± 2.2

31.5 ± 2.6

31.5 ± 1.6

31.9 ± 2.1

31.5 ± 1.3

4.1 ± 1.6

3.8 ± 1.4

3.5 ± 1.4

3.5 ± 1.9

2.0 ± 0.8

2.0 ± 0.6

2.0 ± 0.6

1.8 ± 0.7

2.3 ± 1.3

2.4 ± 1.5

2.3 ± 0.7

2.1 ± 0.9

1.3 ± 0.5

1.3 ± 0.9

1.2 ± 0.5

1.0 ± 0.5

2.4 ± 1.1

2.2 ± 1.2

2.3 ± 0.7

2.2 ± 0.6

0.448 ± 0.710

0.315 ± 0.543

0.234 ± 0.406

0.213 ± 0.481