active period of interest was defined as the continuously moving 250 ms windows from stimulus onset to 1000 ms after stimulus onset.By means of group analysis using SnPM, the statistically significant oscillatory changes were visualized as lateral (R-LAT and L-LAT), superior (SUP), anterior (ANT), and posterior (POST) images of three-dimensional images (family-wise correction error (FWE) p<0.05). Sagittal images (R-MED and L-MED) were obtained with SPM 8 (FWE p<0.05).
