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Effect of chronic intermittent exposure to AM radiofrequency field on responses to various types of noxious stimuli in growing rats.

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Mathur R · 2008

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Chronic RF exposure during development altered pain processing in rats at 0.4 W/kg SAR, suggesting developing nervous systems are vulnerable.

Plain English Summary

Summary written for general audiences

Researchers exposed growing rats to AM radio frequency fields (similar to some communication systems) for 2 hours daily over 45 days and tested their pain responses. The exposed rats showed altered pain processing - they became more emotionally reactive to short-term pain but less sensitive to long-term pain. This suggests that chronic RF exposure during development can rewire how the nervous system processes different types of pain signals.

Why This Matters

This study reveals something particularly concerning about EMF exposure during development: it doesn't just affect pain sensitivity, it fundamentally alters how the developing nervous system processes pain signals. The rats were exposed to 73.5 MHz amplitude-modulated RF at 0.4 W/kg SAR - a level within the range of some wireless communication devices. What makes this research significant is that it demonstrates differential effects on pain processing mechanisms, with increased emotional reactivity to acute pain alongside decreased sensitivity to chronic pain. This suggests EMF exposure during critical developmental periods may create lasting changes in neurological function. The science demonstrates that even relatively low-level chronic exposures can alter fundamental nervous system responses. What this means for you is that the developing brain appears particularly vulnerable to RF field effects, adding to the growing body of evidence that children may face greater risks from wireless technology exposure than adults.

Exposure Details

SAR
0.4 W/kg
Power Density
1.33 µW/m²
Source/Device
73.5 MHz
Exposure Duration
2 h/day for 45 days

Exposure Context

This study used 1.33 µW/m² for radio frequency:

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: 1.33 µW/m²Extreme Concern - 1,000 uW/m2FCC Limit - 10M uW/m2Effects observed in the Slight Concern rangeFCC limit is 7,518,797x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 73.5 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 73.5 MHzPower lines50/60 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

To study nociceptive responses to different noxious stimuli in growing rats exposed to a chronic intermittent radiofrequency field

We studied the pattern of nociceptive responses to various noxious stimuli in growing rats exposed t...

The TFL was not affected, HPL was decreased (p < 0.01), and the thresholds of TF and VD were not af...

The data suggest that amplitude modulated RF field differentially affects the mechanisms involved in the processing of various noxious stimuli.

Cite This Study
Mathur R (2008). Effect of chronic intermittent exposure to AM radiofrequency field on responses to various types of noxious stimuli in growing rats. Electromagn Biol Med. 27(3):266-276, 2008.
Show BibTeX
@article{r_2008_effect_of_chronic_intermittent_1193,
  author = {Mathur R},
  title = {Effect of chronic intermittent exposure to AM radiofrequency field on responses to various types of noxious stimuli in growing rats.},
  year = {2008},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/18821202/},
}
PubMed: 18821202

Cited By (13 papers)

View all 13 citing papers on Semantic Scholar

Quick Questions About This Study

Research shows that chronic radio frequency exposure during development can alter pain processing in the nervous system. A 2008 study found that growing rats exposed to AM radio waves became more emotionally reactive to short-term pain but less sensitive to long-term pain, suggesting developmental impacts on pain perception.
AM radio frequency exposure can affect nervous system function, particularly pain processing mechanisms. Research on developing rats showed that 45 days of exposure to 73.5 MHz AM signals altered how the brain responds to different types of painful stimuli, indicating neurological changes from chronic exposure.
Studies suggest radio frequency fields can impact developing nervous systems. Research found that growing rats exposed to AM radio waves for 45 days showed altered pain responses, becoming more emotionally reactive to some pain types while less sensitive to others, indicating developmental vulnerability.
RF radiation can differentially affect pain processing mechanisms in the nervous system. A study showed that chronic AM radio wave exposure increased emotional responses to short-term pain while decreasing sensitivity to long-term pain, suggesting RF fields can rewire pain pathways during development.
Radio wave exposure during development may alter nervous system function, particularly pain processing. Research found that chronic AM radio frequency exposure changed how rats responded to different pain types, increasing emotional reactivity to some stimuli while reducing sensitivity to others, indicating potential neurological impacts.