Table 1 Friedman’s test for ITPC for each window of interest under stimulation conditions

− 600 to − 400 ms,

7 to 13 Hz

χ² = 0.88, p = 0.64

χ² = 0.88, p = 0.64

χ² = 4.88, p = 0.09

− 400 to − 200 ms,

7 to 13 Hz

χ² = 2.63, p = 0.27

χ² = 1.63, p = 0.44

χ² = 4.88, p = 0.09

− 200 to 0 ms,

7 to 13 Hz

χ² = 0.88, p = 0.64

χ² = 2.38, p = 0.31

χ² = 0.13, p = 0.94

− 600 to − 400 ms,

70 to 90 Hz

χ² = 3.5, p = 0.17

χ² = 4.63, p = 0.1

χ² = 1.63, p = 0.44

− 400 to − 200 ms,

70 to 90 Hz

χ² = 4.63, p = 0.1

χ² = 1.63, p = 0.44

χ² = 1.44, p = 0.14

− 200 to 0 ms,

70 to 90 Hz

χ² = 0.38, p = 0.83

χ² = 5.38, p = 0.068

χ² = 1.63, p = 0.44