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Spatial learning, monoamines and oxidative stress in rats exposed to 900MHz 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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Cell phone frequency radiation impaired rats' natural learning behavior and altered brain chemistry in memory centers.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to 900 MHz radiofrequency radiation (the same frequency used by many cell phones) and tested their learning and memory abilities. The EMF-exposed rats showed impaired performance on tasks requiring natural exploration behavior and had altered brain chemistry, particularly in the hippocampus (a key memory center). Interestingly, adding iron overload to the brain didn't make the EMF effects worse, suggesting the radiation alone was sufficient to cause these cognitive changes.

Why This Matters

This study adds important evidence to our understanding of how cell phone radiation affects brain function, particularly memory and learning processes. The 900 MHz frequency tested is identical to what GSM cell phones emit, making these findings directly relevant to human exposure. What's particularly concerning is that the cognitive impairments occurred in tasks involving spontaneous exploration - the kind of natural behavior that mirrors how we navigate and learn in daily life. The fact that EMF exposure alone altered brain chemistry in the hippocampus, without needing additional stressors like iron overload, suggests that radiofrequency radiation can independently affect critical brain regions. While this study used rats, the hippocampus functions similarly across mammals, and the cognitive processes tested are fundamental to human learning and memory formation.

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

Study Details

To examine this hypothesis, Long-Evans rats submitted to 900 MHz exposure or combined 900 MHz EMF and iron overload treatments were tested in various spatial learning tasks (navigation task in the Morris water maze, working memory task in the radial-arm maze, and object exploration task involving spatial and non spatial processing).

Biogenic monoamines and metabolites (dopamine, serotonin) and oxidative stress were measured.

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 900MHz electromagnetic field in combination with iron overload. Behav Brain Res. 2013 Oct 18. pii: S0166-4328(13)00624-4. doi: 10.1016/j.bbr.2013.10.016.
Show BibTeX
@article{k_2013_spatial_learning_monoamines_and_2395,
  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 900MHz electromagnetic field in combination with iron overload.},
  year = {2013},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/24144546/},
}
PubMed: 24144546

Cited By (64 papers)

View all 64 citing papers on Semantic Scholar

Quick Questions About This Study

Yes, a 2013 study found that rats exposed to 900 MHz radiofrequency radiation showed impaired performance on object exploration tasks. The EMF exposure specifically affected their natural exploratory behavior, while navigation and working memory tasks remained unaffected.
Research shows that 900 MHz radiation exposure alters monoamine neurotransmitter levels in the hippocampus, the brain's primary memory center. These brain chemistry changes occurred alongside impaired exploratory behavior in exposed rats, suggesting EMF impacts specific brain functions.
No, a 2013 study found that combining iron overload with 900 MHz EMF exposure did not worsen brain effects. Rats receiving both treatments showed no greater behavioral or neurochemical deficits than those exposed to EMF alone.
No, research found that 900 MHz radiofrequency radiation exposure did not produce global oxidative stress in rat brains. Despite causing behavioral changes and altered brain chemistry, the EMF exposure did not increase harmful oxidative damage markers.
Tasks requiring spontaneous exploratory activity are most vulnerable to 900 MHz EMF effects. While navigation and working memory remained intact, rats showed significant impairment in object exploration tasks that rely on natural curiosity and investigation behaviors.