Fig. 2

Examples of EEG features in motor decoding. EEG features from one of the subject from the BCI Competition IV 2a dataset [214]. a The time course of the change in band power of the EEG signal filtered between 8-12Hz, in left hand and right hand motor imagery, compared to a reference period (0-3s). The shaded regions show the standard deviation of the changes across different trials. The experimental paradigm is also shown below. b The frequency spectrum of the EEG signal during the fixation and motor imagery (c) the topography of the ERD/ERS distribution in different types of motor imagery