Cellular phone electromagnetic field effects on bioelectric activity of human brain

24 volunteers participated in the experiments. The investigation of EEG rea ctions to cellular phone (EMF frequency 902.4 MHz and intensity 0.06 mW/cm( 2)) was conducted. Two experiments were performed with each subject - cellu lar phone exposure and Placebo. Duration of the experiment was 60 min: 15 m in - background: 15 min - EMF exposure or Placebo; 30 min - afterexposure. EEG was recorded in 16 standard leads with <<eyes open>> and <<eyes closed> >. Special software with non-linear dynamics was developed for EEG analyses . One parameter, multichannel (global) correlation dimension, was calculate d. The changes of these parameters can be evidence of brain functional stat e changes. As a result of EEG record processing, a significant increase of global correlation dimension during the exposure and afterexposure period w as discovered, more pronounced in the case of <<eyes closed>>. That can be viewed as the manifestation of cortex activation under phone EMF exposure.