Figure 1

Example images of time–frequency representation of EEG signal of a responder subject (left) and a non-responder subject (right). The vertical (Y) axis represents the frequency in Hertz and the horizontal (X) axis shows the time in seconds.

Example images of time–frequency representation of EEG signal of a responder subject (left) and a non-responder subject (right). The vertical (Y) axis represents the frequency in Hertz and the horizontal (X) axis shows the time in seconds.