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Low-frequency pulsed electromagnetic field exposure can alter neuroprocessing in humans

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Robertson JA et al · 2009

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Low-frequency magnetic field exposure produces measurable changes in human brain activity during pain processing, detected through functional brain imaging.

Plain English Summary

Summary written for general audiences

This functional MRI study examined how exposure to extremely low-frequency magnetic fields (DC to 300 Hz) affects pain processing in the human brain. The researchers found significant differences in brain activation patterns between exposed and sham-exposed groups in regions including the insula, anterior cingulate, and hippocampus/caudate, suggesting that low-intensity magnetic fields can modulate neural activity related to acute thermal pain perception.

Why This Matters

The study builds on prior animal research showing ELF magnetic field effects on pain sensitivity by providing evidence of similar neuromodulatory effects in humans using neuroimaging. The findings suggest magnetoreception mechanisms in humans may differ from those used for orientation and navigation in animals.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 15 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 15 HzPower lines50/60 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study.

Cite This Study
Robertson JA et al (2009). Low-frequency pulsed electromagnetic field exposure can alter neuroprocessing in humans.
Show BibTeX
@article{low_frequency_pulsed_electromagnetic_field_exposure_can_alter_neuroprocessing_in_humans_ce1390,
  author = {Robertson JA et al},
  title = {Low-frequency pulsed electromagnetic field exposure can alter neuroprocessing in humans},
  year = {2009},
  doi = {10.1002/bem.20459},
  
}
DOI: 10.1002/bem.20459PubMed: 19656823

Quick Questions About This Study

Yes, this study found that 15 Hz pulsed electromagnetic fields caused bone cells to release chemical signals that increased blood vessel cell proliferation by 54 times normal rates after 8 hours of exposure.
Researchers confirmed the mystery chemical wasn't VEGF-A, the most common growth factor. The exact identity of this powerful cell-multiplying signal released by EMF-exposed bone cells remains unknown to science.
Yes, the study showed bone cells exposed to 15 Hz EMF released signals that dramatically increased blood vessel cell growth, but blood vessel cells exposed to EMF didn't affect bone cell proliferation.
Yes, 15 Hz falls within the extremely low frequency range produced by power lines, household electrical wiring, and many common appliances. This makes the study's findings relevant to everyday EMF exposure scenarios.
The researchers used 8-hour exposures to 15 Hz pulsed electromagnetic fields at 1.8 millitesla strength. This relatively short exposure period was sufficient to trigger the dramatic 54-fold increase in cell proliferation rates.