Effect of Mobile Phone Radiation on EEG

The electroencephalogram (EEG) is a record of the oscillations of brain electric potentials. The EEG provides a convenient window on the mind, revealing synaptic action that strongly co-relate with brain state. Fractal dimension, the measure of signal complexity can be used to characterize the physiological conditions of the brain. As the EEG signal is non linear, non stationary and noisy, non linear methods will be suitable for the analysis. In this paper Higuichi´s fractal dimension analysis is applied to find the fractal dimension of EEG. EEGs of 10 volunteers were recorded at rest and on exposure to radio frequency (RF) emissions from mobile phones having different SAR values. Mobile phones were positioned first at the auricle and then next to Cz position. Fractal dimensions for all conditions are calculated and analyzed using F-test, In most of the cases, null hypothesis is rejected with 95% confidence. This statistical result shows that there are some changes in the FD while using mobile phone, which demonstrate transformation in the activities of brain due to radiation.