Fig. 2From: Characterization of the planarian surface electroencephalogramOverview of the data of one planarian recorded during darkness along different processing stages. Raw data was imported into Matlab. In the next step, the raw data were filtered between 0.1 and 23 Hz to remove line noise artifacts. Subsequently, the data were cut into 6 s-segments, and noisy segments were removed. Finally, data were transformed into the frequency domain between 0.5 and 20 HzBack to article page