Similarities in the harmonic structure of EEG activity provoked by intermittent photic stimulation in epileptic and healthy subjects.

The goal of the present study was to analyze the power spectra for two groups of subjects: epileptic patients and healthy subjects in order to investigate the harmonic structure of resonance provoked by Intermittent Photic Stimulation (IPS) in the range between 6 Hz and 33 Hz in 3 Hz steps. Electroencephalogram data were recorded from 11 female subjects at the age between 15 and 25. The harmonic structure of frequencies observed in the power spectra of EEG in the epileptic patients and healthy subjects is similar. A possible explanation to those results is the fact, that epilepsy is a functional disorder, which under specific clinical conditions can be provoked by IPS. If there is no epileptic reaction to the IPS, the brain of an epileptic subject behaves like in a healthy one.