Average induced amplitude spectra. A: average induced EEG amplitudes at right parietal electrode (spontaneous: n = 14,337 trials; evoked: n = 13,774 trials). B: average induced amplitudes across all LFP channels (spontaneous: n = 14,337 trials; evoked: n = 13,774 trials). Shading represents ±1 SE, although SE may appear narrower than line width, especially at high frequencies.