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Effect of 1.8 GHz radiofrequency electromagnetic radiation on novel object associative recognition memory in mice.

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Wang K, Lu JM, Xing ZH, Zhao QR, Hu LQ, Xue L, Zhang J, Mei YA. · 2017

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Even brief RF exposure can physically alter brain cell structure and memory function, proving electromagnetic fields are biologically active.

Plain English Summary

Summary written for general audiences

Researchers exposed mice to 1.8 GHz radiofrequency radiation (similar to cell phone signals) for 30 minutes and found it actually improved their memory performance on recognition tasks. The radiation changed brain cell structure and electrical activity in memory-related brain regions. However, the exposure level used was much higher than what people typically experience from everyday devices.

Why This Matters

This study presents an interesting paradox in EMF research - while most studies examining cognitive effects of radiofrequency radiation report impairments, this research found memory enhancement at high exposure levels. The 3.3 W/kg SAR used here is significantly higher than typical cell phone exposures (which average 0.5-1.5 W/kg during calls). What makes this particularly noteworthy is the documented physical changes in brain tissue - increased dendritic spine density and altered neuronal firing patterns. The reality is that any biological effect, whether seemingly positive or negative, demonstrates that RF radiation is bioactive and can modify brain function. The researchers themselves acknowledge the exposure levels were 'outside the range encountered in normal daily life,' but the fundamental finding remains: radiofrequency radiation measurably changes how brain cells operate. This adds to the growing body of evidence that dismissing EMF as biologically inert is scientifically untenable.

Exposure Details

SAR
>2.2 W/kg
Source/Device
1.8 GHz
Exposure Duration
30 minutes

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 2.23 µW/m²Extreme Concern - 1,000 uW/m2FCC Limit - 10M uW/m2Effects observed in the Slight Concern rangeFCC limit is 4,484,305x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 1.80 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 1.80 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

The aim of this study is to investigate Effect of 1.8 GHz radiofrequency electromagnetic radiation on novel object associative recognition memory in mice.

In this study, we examined the effects of single exposure to 1.8 GHz RF-EMR for 30 min on subsequent...

RF-EMR exposure at an intensity of >2.2 W/kg specific absorption rate (SAR) power density induced a ...

The SAR in this study (3.3 W/kg) was outside the range encountered in normal daily life, and its relevance as a potential therapeutic approach for disorders associated with recognition memory deficits remains to be clarified.

Cite This Study
Wang K, Lu JM, Xing ZH, Zhao QR, Hu LQ, Xue L, Zhang J, Mei YA. (2017). Effect of 1.8 GHz radiofrequency electromagnetic radiation on novel object associative recognition memory in mice. Sci Rep. 2017 Mar 17;7:44521. doi: 10.1038/srep44521.
Show BibTeX
@article{k_2017_effect_of_18_ghz_1423,
  author = {Wang K and Lu JM and Xing ZH and Zhao QR and Hu LQ and Xue L and Zhang J and Mei YA.},
  title = {Effect of 1.8 GHz radiofrequency electromagnetic radiation on novel object associative recognition memory in mice.},
  year = {2017},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/28303965/#:~:text=These%20results%20demonstrate%20that%20exposure,the%20hippocampus%20and%20prefrontal%20cortex.},
}
PubMed: 28303965

Cited By (40 papers)

Quick Questions About This Study

Yes, a 2017 study found that 30-minute exposure to 1.8 GHz radiofrequency radiation actually improved recognition memory in mice. However, the exposure level (3.3 W/kg SAR) was much higher than typical daily exposure from phones and devices.
Research shows 1.8 GHz radiation exposure increases dendritic spine density and length in hippocampal and prefrontal cortical neurons. These structural changes in brain cells correlated with improved memory performance, though at exposure levels far exceeding normal use.
The study used 3.3 W/kg specific absorption rate (SAR), which is significantly higher than normal daily exposure levels. Researchers noted this SAR level is outside the range people encounter in everyday life with phones and wireless devices.
Yes, 30-minute exposure to 1.8 GHz radiation altered resting membrane potential and action potential frequency in hippocampal and prefrontal cortical neurons. These changes in brain electrical activity occurred alongside the observed memory improvements in mice.
While the study showed memory improvements in mice, researchers noted the relevance as a potential therapeutic approach for recognition memory deficits remains unclear. The extremely high exposure levels used make practical application questionable.