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Moffat SD Mobile phone exposure and spatial memory.

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Wiholm C, Lowden A, Kuster N, Hillert L, Arnetz BB, Akerstedt T · 2009

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Mobile phone radiation at typical use levels produced opposite cognitive effects in sensitive versus non-sensitive users, highlighting individual variation in EMF responses.

Plain English Summary

Summary written for general audiences

Researchers exposed participants to mobile phone radiation at 1.4 W/kg (similar to real phone use) for 2.5 hours while they performed spatial memory tasks on a computer. Surprisingly, people who reported symptoms from phone use actually performed better during radiation exposure, while those without symptoms showed no change. This unexpected finding challenges assumptions about how phone radiation affects brain function.

Why This Matters

This study reveals the complexity of EMF effects on brain function. The 1.4 W/kg exposure level matches what your brain experiences during typical mobile phone calls, making these findings directly relevant to daily phone use. What's particularly intriguing is the differential response between symptomatic and non-symptomatic users - those already experiencing EMF-related symptoms actually showed improved spatial memory during exposure. This paradoxical result suggests our understanding of how radiofrequency radiation affects cognitive function is far from complete. The science demonstrates that EMF exposure doesn't produce uniform effects across all individuals, and factors like pre-existing sensitivity may play crucial roles in determining biological responses.

Exposure Details

SAR
1.4 W/kg
Source/Device
884 MHz
Exposure Duration
2 1/2 hours

Exposure Context

This study used 1.4 W/kg for SAR (device absorption):

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 Exposure Level in ContextStudy Exposure Level in ContextThis study: 1.4 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern rangeFCC limit is 1x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 884 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 884 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

This study investigated the effects of a 2 1/2 h RF exposure (884 MHz) on spatial memory and learning, using a double-blind repeated measures design.

The exposure was designed to mimic that experienced during a real-life mobile phone conversation. Th...

Results revealed a main effect of RF exposure and a significant RF exposure by group effect on dista...

Until this new finding is further investigated, we can only speculate about the cause.

Cite This Study
Wiholm C, Lowden A, Kuster N, Hillert L, Arnetz BB, Akerstedt T (2009). Moffat SD Mobile phone exposure and spatial memory. Bioelectromagnetics.30(1):59-65, 2009.
Show BibTeX
@article{c_2009_moffat_sd_mobile_phone_1430,
  author = {Wiholm C and Lowden A and Kuster N and Hillert L and Arnetz BB and Akerstedt T},
  title = {Moffat SD Mobile phone exposure and spatial memory.},
  year = {2009},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/18792947/},
}
PubMed: 18792947

Cited By (50 papers)

View all 50 citing papers on Semantic Scholar

Quick Questions About This Study

A 2009 study found that cell phone radiation at typical exposure levels produced unexpected effects on spatial memory. People who reported phone sensitivity actually performed better on memory tasks during radiation exposure, while those without symptoms showed no change in performance.
One study surprisingly found that mobile phone radiation improved spatial memory performance in people who reported electromagnetic sensitivity symptoms. However, researchers emphasized this unexpected finding needs further investigation before drawing conclusions about cognitive enhancement effects.
Research on 884 MHz radiation (similar to cell phone frequencies) shows mixed effects on brain function. A 2009 study found it improved memory performance in sensitive individuals but had no effect on others, challenging simple assumptions about harm.
Current research suggests cell phone radiation effects on memory are more complex than expected. A controlled study found radiation exposure actually improved spatial memory in people with electromagnetic sensitivity, while showing no negative effects in non-sensitive individuals.
Phone radiation at 1.4 W/kg exposure levels produced surprising results in spatial memory testing. People with electromagnetic sensitivity traveled shorter distances to complete memory tasks during radiation exposure, indicating improved performance rather than impairment.