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Temporal patterns of extremely low frequency magnetic field-induced motor behavior changes in Mongolian gerbils of different age

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Janać B, Selaković V, Rauš S, Radenović L, Zrnić M, Prolić Z. · 2012

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Magnetic fields from power lines altered brain motor function in gerbils for days after exposure, with age determining sensitivity patterns.

Plain English Summary

Summary written for general audiences

Researchers exposed young and older gerbils to 50 Hz magnetic fields (power line frequency) for seven days. Both age groups showed significant changes in movement and activity levels that persisted for days after exposure ended, indicating brain motor centers are sensitive to electromagnetic fields.

Why This Matters

This study provides compelling evidence that extremely low frequency magnetic fields - the type generated by power lines, household wiring, and electrical appliances - can alter brain function in measurable ways. The magnetic field strengths tested (0.1 to 0.5 mT) are actually quite high compared to typical residential exposures, which usually range from 0.01 to 0.1 mT near power lines. However, the key finding is that these fields produced lasting neurological changes that persisted days after exposure ended. The age-dependent responses suggest developing and aging brains may be particularly vulnerable to EMF effects. What this means for you is that the brain's motor control systems can be influenced by magnetic field exposure, adding to the growing body of research showing EMF can affect nervous system function. While we can't directly extrapolate animal studies to humans, this research supports the need for precautionary approaches to EMF exposure, especially for children and older adults.

Exposure Details

Magnetic Field
0.1, 0.25 and 0.5 mG
Source/Device
50 Hz
Exposure Duration
seven days

Exposure Context

This study used 0.1, 0.25 and 0.5 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: 0.1, 0.25 and 0.5 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the No Concern rangeFCC limit is 20,000x 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

The aim of this study was to investigate the influence of extremely low frequency magnetic field (ELF-MF) on different behavior parameters (locomotion, stereotypy, and immobility) in 3- and 10-month-old male Mongolian gerbils.

The animals were continuously exposed to ELF-MF (50 Hz; 0.1, 0.25 and 0.5 mT) for seven days. Their ...

In 3-month-old gerbils, exposure to ELF-MF (0.1, 0.25 and 0.5 mT) increased motor behavior (locomot...

It can be proposed that the specific temporal patterns of ELF-MF-induced motor behavior changes in 3- and 10-month-old gerbils are a consequence of age-dependent morpho-functional differences in the brain structures responsible for a control of motor behavior.

Cite This Study
Janać B, Selaković V, Rauš S, Radenović L, Zrnić M, Prolić Z. (2012). Temporal patterns of extremely low frequency magnetic field-induced motor behavior changes in Mongolian gerbils of different age Int J Radiat Biol. 88(4):359-366, 2012.
Show BibTeX
@article{b_2012_temporal_patterns_of_extremely_264,
  author = {Janać B and Selaković V and Rauš S and Radenović L and Zrnić M and Prolić Z. },
  title = {Temporal patterns of extremely low frequency magnetic field-induced motor behavior changes in Mongolian gerbils of different age},
  year = {2012},
  doi = {10.3109/09553002.2012.652725},
  url = {https://www.tandfonline.com/doi/abs/10.3109/09553002.2012.652725},
}
DOI: 10.3109/09553002.2012.652725

Cited By (15 papers)

View all 15 citing papers on Semantic Scholar

Quick Questions About This Study

Yes, 50 Hz magnetic fields significantly altered movement patterns in Mongolian gerbils. Young gerbils showed increased activity and movement, while older gerbils had mixed responses depending on field strength. These behavioral changes persisted for days after exposure ended, indicating lasting effects on brain motor centers.
Research shows 50 Hz magnetic fields caused delayed behavioral effects in gerbils that appeared three days after exposure stopped. Both young and older animals experienced these delayed changes in movement and activity levels, suggesting the brain's motor control systems remain affected even after EMF exposure ends.
Yes, age significantly affects response to 50 Hz magnetic fields. Young 3-month-old gerbils consistently showed increased movement and activity, while 10-month-old gerbils had variable responses ranging from decreased to increased activity depending on the magnetic field strength used in the study.
Magnetic field strengths of 0.1, 0.25, and 0.5 millitesla (typical of power line environments) all caused behavioral changes in gerbils. The effects varied by age group and field strength, with 0.5 mT producing the most pronounced stimulation of motor behavior in older animals.
Power frequency EMF effects can persist for at least three days after exposure ends. Gerbils exposed to 50 Hz magnetic fields for seven days continued showing altered movement patterns and activity levels days later, indicating the brain's motor control systems experience lasting changes from EMF exposure.