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Brain & Nervous System

Effects of 50 Hz electromagnetic fields on rat cortical synaptosomes

No Effects Found

Aldinucci C, Carretta A, Maiorca SM, Leoncini S, Signorini C, Ciccoli L, Pessina GP · 2009

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Even magnetic fields 2,000 times stronger than household levels showed no effects on rat brain cells' basic functions.

Plain English Summary

Summary written for general audiences

Italian researchers exposed rat brain nerve terminals (synaptosomes) to 50 Hz magnetic fields at 2 milliTesla for 2 hours to study effects on basic cellular functions. They found no changes in energy production, calcium levels, membrane function, or oxidative stress markers. This suggests that power-frequency magnetic fields at this intensity don't disrupt fundamental brain cell processes.

Why This Matters

This study provides important data on how extremely low frequency (ELF) magnetic fields affect brain cells at the most basic level. The 2 milliTesla exposure used here is roughly 2,000 times stronger than typical household magnetic field exposures, which range from 0.5 to 4 milliGauss (0.05 to 0.4 milliTesla) near common appliances. The fact that even this intense exposure produced no measurable effects on synaptosomal function offers some reassurance about everyday ELF exposures. However, this is an isolated study using a specific cell preparation, and synaptosomes represent only one aspect of brain function. The science demonstrates that EMF effects can be highly dependent on exposure parameters, cell types, and biological endpoints measured. What this means for you is that while this research suggests ELF fields may not directly damage basic brain cell machinery, it doesn't address longer-term effects or more complex neurological processes.

Exposure Details

Magnetic Field
2 mT
Source/Device
50 Hz
Exposure Duration
2-h

Exposure Context

This study used 2 mT 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: 2 mTExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Extreme Concern range (Building Biology)This level is 10 times the FCC limit
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 present study examined the effect of a 2-h exposure of synaptosomes on a system generating a peak magnetic field of 2 mT.

We evaluated the changes of the synaptosomal mitochondrial respiration rate and ATP production, memb...

The intrasynaptosomal Ca2+ concentration decreased slowly and no depolarization of the synaptosomal...

These results indicate that the physiological behavior of cortical synaptosomes was unaffected by weak pulsed EMFs.

Cite This Study
Aldinucci C, Carretta A, Maiorca SM, Leoncini S, Signorini C, Ciccoli L, Pessina GP (2009). Effects of 50 Hz electromagnetic fields on rat cortical synaptosomes Toxicol Ind Health. 25(4-5):249-252, 2009.
Show BibTeX
@article{c_2009_effects_of_50_hz_2822,
  author = {Aldinucci C and Carretta A and Maiorca SM and Leoncini S and Signorini C and Ciccoli L and Pessina GP},
  title = {Effects of 50 Hz electromagnetic fields on rat cortical synaptosomes},
  year = {2009},
  doi = {10.1177/0748233709103031},
  url = {https://journals.sagepub.com/doi/abs/10.1177/0748233709103031},
}
DOI: 10.1177/0748233709103031

Cited By (17 papers)

Quick Questions About This Study

No, Italian researchers found that 2-hour exposure to 50 Hz magnetic fields at 2 milliTesla caused no damage to rat brain nerve terminals (synaptosomes). Energy production, calcium levels, membrane function, and oxidative stress markers all remained normal after exposure.
A 2009 study found that 50 Hz magnetic fields at 2 milliTesla did not significantly affect calcium concentrations in rat brain nerve terminals. The intrasynaptosomal calcium decreased slowly but showed no abnormal depolarization of cell membranes.
No, exposure to 2 milliTesla 50 Hz magnetic fields for 2 hours did not increase oxidative stress in rat brain tissue. Researchers found no changes in free iron release or F2-isoprostanes, key markers of cellular damage.
Research on rat cortical synaptosomes exposed to weak pulsed 50 Hz electromagnetic fields showed no physiological changes. Basic cellular functions including energy production, membrane stability, and calcium regulation remained unaffected after 2-hour exposure at 2 milliTesla.
Italian scientists found that rat brain nerve terminals maintain normal function during 50 Hz magnetic field exposure. After 2 hours at 2 milliTesla, synaptosomes showed no changes in fundamental processes like energy metabolism or membrane integrity.