Figure 16From: Distinguishing low frequency oscillations within the 1/f spectral behaviour of electromagnetic brain signalsEvoked responses data normalised to reveal spectral peaks. (a) PSD of Channel C3, (b) PSD of Channel Cz, (c) PSD of Channel C4. Note the low peak apparent at 10 Hz corresponding to a weak P300 response in (b) and the clear prominent activity in the gamma band around 20–30 Hz in (a) and (c).Back to article page