The radiation emitted from mobile phones has various deleterious effects on human health. This study was conducted to evaluate the effects of exposure to the 900-MHz radiation electromagnetic fields (EMF) emitted by mobile phones on Ammon's horn and the dentate gyrus (DG) in the hippocampus and cerebellum of male Wistar albino rats. We also investigated the neuroprotective effects of the antioxidants Boswellia sacra (BS) and folic acid (FA) against exposure to EMF. Twenty-four adult male rats were randomly divided into four groups of six animals each, an EMF group, an EMF + FA exposure group (EFA), an EMF + BS exposure group (EBS) and a control group (Cont). The EMF, EFA and EBS groups were exposed to 900-MHz EMF radiation inside a tube once daily over 21 days (60 min/day). The Cont group was not exposed to 900-MHz EMF. The results showed that EMF caused a significant decrease in total pyramidal and granular cell numbers in the hippocampus, and DG and in Purkinje cell numbers in the cerebellum in the EMF group compared to the other groups (p < 0.05). BS and FA attenuated the neurodegenerative effects of EMF in the hippocampus and cerebellum. Significant differences were also determined between the numbers of neurons in the EFA and EMF groups, and between the EBS and EMF groups (p < 0.05). However, there were no significant differences among Cont, EFA and EBS (p > 0.05). Our results may contribute to ongoing research into the effects of 900-MHz EMF exposure. Abbreviations: BS, Boswellia sacra; CA, cornu ammonis; CAT, catalase; CE, coefficient of error; CV, coefficient of variation; DG, dentate gyrus; DNA, deoxyribonucleic acid; EMF, electromagnetic field; EBS, the group that is exposed to EMF and received a single daily gavage of BS (500 mg/kg/day) during 21 days; EEG, electroencephalogram; EFA, the group that is exposed to EMF and received a single daily gavage of folic acid (50 mg/kg/day) during 21 days; FA, folic acid; gr, granular layer; H₂O₂, hydrogen peroxide; MHz, Megahertz; ml, molecular layer; RF, radiofrequency; ROS, reactive oxygen specimens; SEM, standard error of the mean.

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