Fig. 2.

HHT time–frequency spectrum of the CST EEG. Data for analysis from all trials were time-locked to the target onset (the target was always presented for a fixed interval of 200 ms). A contrast between incongruent and congruent trials was carried out for the HMLA (A) and LMHA (2B) groups and a contrast between the two groups were also performed for the difference in power between incongruent trials and congruent trials (2C). (The white circles indicate the regions of significance, P < 0.05 CBnPP).