Steady-state visually evoked potential recording

Prior work comparing functional MRI (fMRI) and visually evoked potential (VEP) suggests that steady-state visually evoked potentials (ssVEPs) are generated predominantly from early visual cortical areas and area MT (Di Russo et al., 2007). We recorded ssVEPs with a single active electrode over Oz based on the 10–20 international criteria for electroencephalogram (EEG) placement over early visual cortex. A ground and reference electrode were placed on each mastoid. The ssVEP signal was recorded using a biopac (Goleta, CA) ERS100c amplifier with a maximum bandwidth of 1 Hz to 10 kHz at a 2 kHz sampling rate.