Effects of exposure to extremely low-frequency electromagnetic fields on spatial and passive avoidance learning and memory, anxiety-like behavior and oxidative stress in male rats.
Karimi SA, Salehi I, Shykhi T, Zare S, Komaki A. · 2019
View Original AbstractELF-EMF exposure improved memory but increased anxiety and cellular damage in rats at levels comparable to some household appliances.
Plain English Summary
Researchers exposed male rats to extremely low-frequency electromagnetic fields (ELF-EMF) for 2 hours daily over 60 days at various intensities. They found that certain exposure levels improved memory retention and passive learning, but also increased anxiety-like behaviors and oxidative stress (cellular damage from unstable molecules). This suggests ELF-EMF exposure creates a complex mix of both beneficial and harmful effects on brain function.
Why This Matters
This study reveals the complexity of ELF-EMF effects on brain function, showing that these fields can simultaneously enhance certain cognitive abilities while causing anxiety and cellular damage. The exposure levels tested (1 to 2000 microTesla) span from extremely low to moderately high compared to typical household appliances, which typically emit 0.1 to 10 microTesla. What makes this research particularly significant is that it demonstrates EMF effects aren't simply 'good' or 'bad' - they're nuanced, with the same exposure potentially improving memory while increasing stress responses. The finding that oxidative stress increased at relatively low exposure levels (100 microTesla) is concerning, as this level is within range of some common household sources. The reality is that your brain's response to EMF exposure involves multiple biological pathways that can be affected differently, creating a complex risk-benefit profile that regulatory agencies have yet to fully address.
Exposure Details
- Magnetic Field
- 0.001, 0.1, 0.5, 2 mG
- Exposure Duration
- 60 days (2 h/day)
Exposure Context
This study used 0.001, 0.1, 0.5, 2 mG for magnetic fields:
- 50x above the Building Biology guideline of 0.2 mG
- 10x above the BioInitiative Report recommendation of 1 mG
Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.
Where This Falls on the Concern Scale
Study Details
In the present study, we explored the effects of ELF-EMF on oxidative stress and behaviors of rats.
Seventy-two adult male Wistar rats were randomly divided into following groups, control, sham exposu...
During spatial reference memory test, animals in ELF-EMF exposure groups (100, and 2000 μT) spent mo...
Our results may allow the conclusion that exposure to ELF-EMFs can improve memory retention (but not acquisition) in the adult male rats. Although exposure to ELF-EMFs could be a factor in the development of anxious state or oxidative stress.
Show BibTeX
@article{sa_2019_effects_of_exposure_to_395,
author = {Karimi SA and Salehi I and Shykhi T and Zare S and Komaki A.},
title = {Effects of exposure to extremely low-frequency electromagnetic fields on spatial and passive avoidance learning and memory, anxiety-like behavior and oxidative stress in male rats.},
year = {2019},
url = {https://www.sciencedirect.com/science/article/abs/pii/S016643281831074X},
}