Differently from the delta band, the theta band does not seem to have a clear behavior regarding frequency amplitude: there were certain channels in figure \ref{fig:Tha} (and even specific frequency regions) in which the task block amplitude was greater than the rest block amplitude and vice versa. Besides, the frequency response for both blocks was much more similar than in the delta band.
Electrodes F5 and FFC3 seem to have presented some interesting differences (the first one in particular). From about 5.5 Hz to about 7.5 Hz, F5 electrode showed greater frequency amplitude at the rest blocks. Task blocks had a similar response regarding the shape of the signal, but with a smaller frequency amplitude. Something analogous occurred to the FFC3 electrode from about 6 Hz. Again, as in the delta band, both of the electrodes that had a more apparent difference in their signals were located in the left side of the scalp.
Furthermore, the electrodes located above the right side of the scalp showed greater contributions to the theta band frequencies in the range between 4.5 and 6 Hz. Whereas for most of these electrodes there were frequency peaks at about 6 Hz, for their counterparts electrodes, on the left side of the scalp, the frequency amplitude decreased at this same frequency.