Topographies following the 3 MIs computed from 27-channel EEG data. (A-D) ERD/ERS for time points in the 8-13 Hz bands for all MIs and in the 25-35 Hz bands for feet MI. The thin curves are the data on the pre-training day and the thick curves are the data on the post-training day. The horizontal gray bar on the time axis indicates the duration of the MI and rest tasks. The filled bars at the bottom of the panel indicate significant differences of ERD/ERS between the 2 days (Wilcoxon signed-rank test, p < 0.01). (E-L) Topographical ERD/ERS maps on the pre- and post-training days. The magnitude of ERD/ERS was extracted from the 8-13 Hz and 25-35 Hz bands during 5.0-10.0 s. The set of electrodes used for these maps is shown to the right of panel L.