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Exposure to extremely low-frequency magnetic field restores spinal cord injury-induced tonic pain and its related neurotransmitter concentration in the brain

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Kumar S, Jain S, Velpandian T, Petrovich Gerasimenko Y, D Avelev V, Behari J, Behari M, Mathur R. · 2013

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Controlled magnetic field exposure restored normal pain responses and brain chemistry in spinal-injured rats, showing EMF effects depend entirely on dose and context.

Plain English Summary

Summary written for general audiences

Researchers exposed rats with spinal cord injuries to extremely low-frequency magnetic fields (50 Hz, similar to power line frequencies) for 2 hours daily over 8 weeks. The magnetic field exposure restored normal pain responses and corrected abnormal brain chemical levels that had developed after the spinal injury. This suggests that specific EMF exposures might have therapeutic potential for certain neurological conditions.

Why This Matters

This study reveals something remarkable about EMF exposure that challenges the typical narrative of harm. The researchers found that chronic exposure to 50 Hz magnetic fields at 17.96 microTesla actually restored normal brain function in rats with spinal cord injuries. What makes this particularly interesting is the exposure level - roughly equivalent to what you might experience standing very close to high-voltage power lines, but delivered in controlled therapeutic doses. The science demonstrates that EMF effects aren't simply 'good' or 'bad' - they're highly dependent on frequency, intensity, duration, and biological context. This research adds to a growing body of evidence showing that certain EMF parameters can have beneficial biological effects, particularly in neurological conditions. While this doesn't mean you should seek out EMF exposure for health benefits, it does underscore why the EMF health debate requires nuanced understanding rather than blanket statements about safety or danger.

Exposure Details

Magnetic Field
0.01796 mG
Source/Device
50 Hz
Exposure Duration
2 h/day × 8 weeks)

Exposure Context

This study used 0.01796 mG for magnetic fields:

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: 0.01796 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the No Concern rangeFCC limit is 111,359x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 50 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 50 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

We report the effect of magnetic field (MF; 17.96 μT, 50 Hz) on tonic pain behavior and related neurotransmitters in the brain of complete thoracic (T13) SCI rats at week 8.

Adult male Wistar rats were divided into Sham, SCI and SCI+MF groups. Formalin-pain behavior was com...

Session-PR, block-PR and number of flinches were significantly lower, while time spent in categories...

We suggest beneficial effect of chronic (2 h/day × 8 weeks) exposure to MF (50 Hz, 17.96 μT) on tonic pain that is mediated by 5-HT, GABA and NE in complete SCI rats.

Cite This Study
Kumar S, Jain S, Velpandian T, Petrovich Gerasimenko Y, D Avelev V, Behari J, Behari M, Mathur R. (2013). Exposure to extremely low-frequency magnetic field restores spinal cord injury-induced tonic pain and its related neurotransmitter concentration in the brain Electromagn Biol Med. 32(4):471-483, 2013.
Show BibTeX
@article{s_2013_exposure_to_extremely_lowfrequency_270,
  author = {Kumar S and Jain S and Velpandian T and Petrovich Gerasimenko Y and D Avelev V and Behari J and Behari M and Mathur R. },
  title = {Exposure to extremely low-frequency magnetic field restores spinal cord injury-induced tonic pain and its related neurotransmitter concentration in the brain},
  year = {2013},
  doi = {10.3109/15368378.2012.743907},
  url = {https://www.tandfonline.com/doi/abs/10.3109/15368378.2012.743907},
}
DOI: 10.3109/15368378.2012.743907

Cited By (16 papers)

Quick Questions About This Study

Research suggests electromagnetic fields might help certain pain conditions. A 2013 study found that 50 Hz magnetic field exposure restored normal pain responses in rats with spinal cord injuries. The treatment corrected abnormal brain chemical levels over 8 weeks of daily exposure.
Power line frequency (50 Hz) can influence brain neurotransmitter levels. Research on spinal cord-injured rats showed that magnetic field exposure at this frequency normalized serotonin, GABA, and norepinephrine concentrations that had become imbalanced after injury.
A 2013 study suggests 50 Hz magnetic fields aren't necessarily harmful and may have therapeutic benefits. Researchers found this frequency helped restore normal brain chemistry and pain responses in rats with spinal cord injuries when applied consistently.
Electromagnetic fields can alter pain perception by changing brain chemistry. Research shows 50 Hz magnetic field exposure reduced excessive pain sensitivity in spinal cord-injured rats by restoring normal levels of serotonin and other key neurotransmitters in the brain.
Magnetic field therapy may help restore normal neurological function after injury. A controlled study found that 50 Hz magnetic field exposure for 2 hours daily corrected pain abnormalities and brain chemical imbalances in rats with spinal cord damage.