FIGURE 2.

Electroencephalography processing pipeline. First, we applied a notch filter to dismiss the power line artifact. Next, we used a bandpass filter to retain only the desired EEG spectral content. Then, we resampled the filtered signal to match the expected span of the phase under processing. Subsequently, we divided the EEG signals into 2-s epochs. We performed artifact removal, detrending, and standardization at epoch level, and finally we extracted spectral features and smoothed them through a moving-average filter.