Conclusions
In this study, we applied STFT to decompose single-channel
EEG signal into the time-frequency domain to construct multi-
channel information. Based on these reconstructed data, we used
CSP combined with a SVM to obtain equivalent high classification
accuracies from both the sensorimotor and forehead areas, which
suggests that motor imagery can be detected with a single channel
not only from the traditional sensorimotor area but also from the
forehead area.