Figure 3
From: Detection of the 40 Hz auditory steady-state response with optically pumped magnetometers
Grand-average waveforms and time–frequency representations during the 40 Hz auditory steady-state response. (a) Grand-average waveforms recorded by the six OPM sensors show that the magnetoencephalographic fields were modulated by the repetitive auditory stimuli at 40 Hz. (b) Grand-average time–frequency representations show that the relative power increased in the 40 Hz gamma band compared to baseline power. Upper panels show the mean power changes of the gamma frequency band at 38–42 Hz. The 40 Hz gamma power increased for 1 s when 40 Hz auditory steady-state response stimuli were presented.
