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Brain & Nervous System

Histopathological examinations of rat brains after long-term exposure to GSM-900 mobile phone radiation.

No Effects Found

Grafström G, Nittby H, Brun A, Malmgren L, Persson BR, Salford LG, Eberhardt J. · 2008

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Long-term intermittent cell phone radiation at typical usage levels showed no detectable brain tissue damage in this rat study.

Plain English Summary

Summary written for general audiences

Swedish researchers exposed rats to GSM-900 cell phone radiation once weekly for over a year at power levels similar to what humans experience during phone calls. When they examined the rats' brains afterward, they found no signs of damage including blood-brain barrier leakage, cell death, or aging-related changes. This suggests that intermittent cell phone radiation exposure at typical usage levels may not cause detectable brain tissue damage.

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

The study examined exposure from: 900 MHz Duration: once weekly in a 2-h period

Study Details

We have investigated in a rat model the effects of repeated exposures under a long period to Global System for Mobile Communication-900 MHz (GSM-900) radiation.

Out of a total of 56 rats, 32 were exposed once weekly in a 2-h period, for totally 55 weeks, at dif...

In this study, no significant alteration of any these histopathological parameters was found, when c...

Cite This Study
Grafström G, Nittby H, Brun A, Malmgren L, Persson BR, Salford LG, Eberhardt J. (2008). Histopathological examinations of rat brains after long-term exposure to GSM-900 mobile phone radiation. Brain Res Bull.77(5):257-263, 2008.
Show BibTeX
@article{g_2008_histopathological_examinations_of_rat_3046,
  author = {Grafström G and Nittby H and Brun A and Malmgren L and Persson BR and Salford LG and Eberhardt J.},
  title = {Histopathological examinations of rat brains after long-term exposure to GSM-900 mobile phone radiation.},
  year = {2008},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/18782606/},
}
PubMed: 18782606

Cited By (67 papers)

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Quick Questions About This Study

No, Swedish researchers found no brain tissue damage in rats exposed to GSM-900 radiation once weekly for over a year. The study detected no blood-brain barrier leakage, cell death, or aging-related changes compared to unexposed control rats, suggesting intermittent exposure at typical usage levels may not cause detectable brain damage.
This 2008 study found no blood-brain barrier leakage in rats exposed to GSM-900 radiation once weekly for over a year. The intermittent exposure pattern at power levels similar to human phone calls did not compromise the protective barrier between blood and brain tissue in the tested animals.
Brain cells showed no signs of damage after long-term GSM-900 exposure in this rat study. Researchers found no cell death, structural changes, or aging-related alterations in brain tissue after weekly radiation exposure for over a year at levels comparable to human cell phone use.
No detectable brain aging occurred in rats exposed to GSM-900 radiation weekly for over a year. The Swedish study found no aging-related changes in brain tissue histology, suggesting that intermittent cell phone radiation exposure at typical usage levels may not accelerate brain aging processes.
No histopathological brain changes were detected from weekly 900 MHz radiation exposure in this rat study. After over a year of intermittent GSM-900 exposure at human-relevant power levels, researchers found no significant alterations in brain tissue structure or cellular integrity compared to control animals.