Projection of the steady state visual evoked potentials on prefrontal cortex

The aim of this experiment was to investigate the impact of steady-state visual stimulation on electrophysiology of the human brain. The study was performed on 6 subjects and the measurements were made by the non-invasive technique, EEG (electroencephalography). The changes in the electrophysiological brain signals that had been obtained by EEG during visual stimulation were analyzed. The amount of changes in the recorded signals exhibited dependencies to the frequency of the applied visual stimulation. In this study, the frequency dependent electrophysiological response of the frontal cortex of the brain was analyzed and compared with the response of the occipital cortex. In both occipital and prefrontal cortices, the highest EEG signal energy was observed at the 10-13 Hz stimulation band. Other than this frequency band, there were no similarities between the two regions in terms of local maximum and minimum signal energy values. On the other hand, when the EEG response to the whole stimulation frequency was considered, the correlation coefficient of the signal powers of both regions was found to be 0.84.