.Xu et al. reported a selective decrease in excitatory synaptic activity and the number of excitatory synapses in
cultured rat hippocampal neurons after exposure to Global System for Mobile Communications (GSM) 1800
MHz micro- waves (Xu et al., 2006). In addition, EMF exposure caused a decrease in the number of granule
cells in the dentate gyrus and a decrease in the total pyramidal cell number in the cornu ammonis (CA) of rats
following prenatal exposure to 900 MHz EMF (Bas et al., 2009b; Odaci et al., 2008). Taken together, these
studies suggest that EMF may affect hippocampal function and damage neuronal cells.