Electrode number

Number of patients

ESRT

1

26

19.24 ± 4.82

2

26

19.62 ± 5.32

3

26

19.82 ± 4.81

4

26

18.99 ± 4.38

5

26

19.70 ± 4.78

6

26

21.20 ± 5.58

7

8

9

10

11

12

25

25

24

24

23

20

20.76 ± 4.86

21.22 ± 4.24

21.18 ± 3.69

21.03 ± 4.35

22.10 ± 5.46

21.76 ± 5.39