ABSTRACT
Twenty four female rats divided into two groups [each group consists of twelve rats] were used in this study in a real exposure experiment in the point of maximum field of the cellular base station radiation field. Five epidural electrodes were implanted in the skull of the first group of rats, two in the frontal region [right and left hemispheres], two in the occipital region [right and left hemispheres], and one in a reference point in the nose. The first group was exposed to microwave radiation and EEG was recorded weekly [monoplolar and bipolar] on the same day and at same time of week for eight weeks. The rats of the second group were exposed at the same place of the maximum field intensity as the first group, and the neurotransmitter serotonin was assayed weekly