H.S. MOHAMMED*, N.M. RADWAN**, NAWAL A. AHMED**

*Biophysics Department, Faculty of Science, Cairo University, Giza, Egypt
**Zoology Department, Faculty of Science, Cairo University, Giza, Egypt

Abstract. In the present study the effect of long-term exposure (1 hour/day for 4 months) to electromagnetic radiation field (EMF) (900 MHz, 0.02 mW/cm2, SAR: 1.165 W/kg) on the EEG of freely moving rat is investigated. The spectral analysis of the EEG bands was done after 1, 2 and 4 months of daily EMF irradiation and after 1 month of stopping irradiation that extended daily for 4 months. The quantitative analysis of EEG revealed a clear shift from high frequency (beta) to lower frequency (delta) in irradiated animals as compared to unexposed animals, which indicated the change in the animal arousal. The cumulative effect of non-thermal EMF has been suggested for chronic exposure to radiation. It could be suggested that EMF cause changes in central cholinergic system that change the cortical excitability that reflected in slowing down of the EEG frequencies.
Key words: Electromagnetic, radiation, EEG, rat, freely moving.

Corresponding author’s e-mail: haitham_sharaf@yahoo.com

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