[Effects of chronic exposure of power frequency magnetic field on neurobehavior in rats]
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Updated: Jun 12, 2026
Long-term Behavioral and Reproductive Consequences of Embryonic Exposure to Low-dose Toxicants
Published on: March 6, 2018
Tong-tong Liu1, Sheng Wang, Li-hua He
1Department of Occupational & Environmental Health, Peking University School of Public Health, Beijing 100191, China.
Objective:
To observe the effect of chronic exposure to extremely low frequency magnetic field on neurobehavioral of adult rats.
Methods:
Fifty Hz sinusoidal extremely low frequency magnetic field (ELF-MF) was used in this experimental procedure and the strength of magnetic field was fixed at 2 mT. Thirty male adult rats were divided randomly into 3 groups: (1) no ELF MF exposure (control group, n=10); (2) exposure to ELF MF 1 h/day (MF1h group, n=10); (3) exposure to ELF MF 4 h/day (MF4h group, n=10). The neurobehavioral changes of rats were detected by the open field test, elevated plus maze test and light/dark box test.
Results:
Compared with controls, no significant difference was found in rats of MF1h group in any test. Rats in MF4h group showed increased thigmotaxis, more grooming in the open field test; less time spent in open arms, central part and more time spent in closed arms. However, no significant difference was observed in the light/dark test in MF1h or MF4h group.
Conclusion:
Chronic ELF MF exposure has an anxiogenic effect on rats, which is dependent on the daily exposure duration.
