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Brain & Nervous System

Effects of sinusoidal electromagnetic fields on histopathology and structures of brains of preincubated white leghorn chicken embryos

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Lahijani MS, Bigdeli MR, Kalantary S. · 2011

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Sinusoidal electromagnetic fields increased apoptotic cells and tissue degeneration in the brains of exposed chicken embryos.

Plain English Summary

Summary written for general audiences

Researchers investigated the effects of sinusoidal electromagnetic fields on the brain histopathology and structures of preincubated white leghorn chicken embryos. Three hundred fertilized eggs were divided into experimental, control, and sham groups, with the experimental eggs exposed to three different field intensities of 1.33, 2.66, and 7.32 mT for 24 hours before incubation. The results suggested that the electromagnetic fields induce brain damages at different levels.

Why This Matters

All eggs were incubated at 38 ± 0.5°C with 60% humidity for 14 days, after which embryo brains were removed and examined. Brain tissue was stained with H&E and TUNEL assay to study histopathology and the process of apoptosis. Additional embryo brains were prepared for examination under a Scanning Electron Microscope. The sham group was placed inside the same coil as the experimental group but received no exposure, serving as a comparison to isolate the effect of the field itself.

Exposure Details

Magnetic Field
1.33 , 2.66, 7.32 mT
Source/Device
50 Hz
Exposure Duration
continuous for 24 h before incubation

Exposure Context

This study used 1.33 , 2.66, 7.32 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: 1.33 , 2.66, 7.32 mTExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Extreme Concern range (Building Biology)This level is 7 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

Effects of sinusoidal electromagnetic fields on histopathology and structures of brains of preincubated white leghorn hen eggs were investigated.

Three hundred healthy fresh fertilized eggs (55–65 gr) were divided into three groups of experimenta...

Results showed electromagnetic fields have toxic effects on brain cells by increasing the number of ...

These findings suggest that the electromagnetic fields induce brain damages at different levels.

Cite This Study
Lahijani MS, Bigdeli MR, Kalantary S. (2011). Effects of sinusoidal electromagnetic fields on histopathology and structures of brains of preincubated white leghorn chicken embryos Electromagn Biol Med. 30(3):146-157, 2011.
Show BibTeX
@article{ms_2011_effects_of_sinusoidal_electromagnetic_271,
  author = {Lahijani MS and Bigdeli MR and Kalantary S.},
  title = {Effects of sinusoidal electromagnetic fields on histopathology and structures of brains of preincubated white leghorn chicken embryos},
  year = {2011},
  doi = {10.3109/15368378.2011.596250},
  url = {https://www.tandfonline.com/doi/abs/10.3109/15368378.2011.596250},
}
DOI: 10.3109/15368378.2011.596250

Cited By (13 papers)

Quick Questions About This Study

Experimental eggs were exposed to three intensities: 1.33, 2.66, and 7.32 mT, for 24 hours before incubation.
The electromagnetic fields were found to have toxic effects on brain cells by increasing the number of apoptotic cells and causing degeneration of brain tissue.
Three hundred healthy fresh fertilized eggs were divided into an experimental group of 50, a control group of 75, and a sham group of 75.
Brains were fixed in 10% formalin and stained with H&E and TUNEL assay to study histopathology and apoptosis, while other brains were prepared for Scanning Electron Microscope examination.
The findings suggested that the electromagnetic fields induce brain damages at different levels.