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Spatial learning, monoamines and oxidative stress in rats exposed to 900 MHz electromagnetic field in combination with iron overload

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Maaroufi K, Had-Aissouni L, Melon C, Sakly M, Abdelmelek H, Poucet B, Save E. · 2013

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Rats exposed to 900 MHz EMF were impaired in object exploration but not in navigation or working memory, and combined EMF with iron overload did not produce greater deficits.

Plain English Summary

Summary written for general audiences

Researchers exposed Long-Evans rats to 900 MHz EMF alone or combined with iron overload and tested them in spatial learning tasks including the Morris water maze, radial-arm maze, and object exploration. EMF-exposed rats were impaired in the object exploration task but not in the navigation or working memory tasks. Combined EMF and iron overload did not produce greater behavioral or neurochemical deficits than EMF alone, and neither treatment caused global oxidative stress.

Why This Matters

The study aimed to test whether combined EMF and iron overload would produce greater cognitive and biochemical effects than either treatment alone. EMF exposure altered monoamine content in several brain areas, primarily the hippocampus. The authors concluded that EMF impacts brain and cognitive processes only in tasks exploiting spontaneous exploratory activity, and there were no synergistic effects with high brain iron.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 900 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 900 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study. The study examined exposure from: 900 MHz Duration: 1 hour per day for 21 consecutive days

Study Details

The objective of the study was thus to examine whether combined 900 MHz EMF exposure and systemic iron overload produces greater cognitive and brain biochemical effects than each treatment separately.

To examine the hypothesis, Long-Evans rats submitted to 900 MHz exposure or combined 900 MHz EMF and...

Rats exposed to EMF were impaired in the object exploration task but not in the navigation and worki...

These results show that there is an impact of EMF on the brain and cognitive processes but this impact is revealed only in a task exploiting spontaneous exploratory activity. In contrast, there are no synergistic effects between EMF and a high content of iron in the brain.

Cite This Study
Maaroufi K, Had-Aissouni L, Melon C, Sakly M, Abdelmelek H, Poucet B, Save E. (2013). Spatial learning, monoamines and oxidative stress in rats exposed to 900 MHz electromagnetic field in combination with iron overload Behav Brain Res. 2013 Oct 18;doi: 10.1016/j.bbr.2013.10.016.
Show BibTeX
@article{k_2013_spatial_learning_monoamines_and_1561,
  author = {Maaroufi K and Had-Aissouni L and Melon C and Sakly M and Abdelmelek H and Poucet B and Save E. },
  title = {Spatial learning, monoamines and oxidative stress in rats exposed to 900 MHz electromagnetic field in combination with iron overload},
  year = {2013},
  
  url = {https://www.sciencedirect.com/science/article/abs/pii/S0166432813006244},
}

Quick Questions About This Study

The study aimed to examine whether combined 900 MHz EMF exposure and systemic iron overload produces greater cognitive and brain biochemical effects than each treatment separately.
Rats exposed to EMF were impaired in the object exploration task but not in the navigation or working memory tasks.
Rats that received combined treatment did not show greater behavioral and neurochemical deficits than EMF-exposed rats.
None of the two treatments produced global oxidative stress.
The results show that EMF impacts the brain and cognitive processes only in a task exploiting spontaneous exploratory activity, and there are no synergistic effects between EMF and high brain iron content.