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Effects of exposure to 50 Hz magnetic field of 1 mT on the performance of detour learning task by chicks

Bioeffects Seen

Che Y, Sun H, Cui Y, Zhou D, Ma Y. · 2007

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Chicks exposed to a 50 Hz magnetic field for 20 hours a day showed impaired detour learning, while 50 minutes a day had no effect.

Plain English Summary

Summary written for general audiences

Researchers examined the effects of a 50 Hz magnetic field at 1 mT intensity on learning and memory in Lohmann brown domestic chicks using a detour learning task. Chicks exposed for 20 hours per day showed a significant impairment in detour learning, while those exposed for 50 minutes per day showed no effect.

Why This Matters

The study used Lohmann brown domestic chicks as its animal model and tested their ability to learn a detour task after magnetic field exposure. The results suggest that the duration of daily exposure mattered: a longer daily exposure of 20 hours was associated with impaired learning, whereas a shorter exposure of 50 minutes was not.

Exposure Details

Magnetic Field
1 mT
Source/Device
50 Hz
Exposure Duration
20 h/day and 50 min/day

Exposure Context

This study used 1 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 mTExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Extreme Concern range (Building Biology)This level is 5 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

In the present study, we examined the effects of exposure to an extremely low-frequency magnetic field of 1 mT intensity on learning and memory in Lohmann brown domestic chicks using detour learning task.

These results show that 20 h/day exposure to a low-frequency magnetic field induces a significant im...

Cite This Study
Che Y, Sun H, Cui Y, Zhou D, Ma Y. (2007). Effects of exposure to 50 Hz magnetic field of 1 mT on the performance of detour learning task by chicks Brain Res Bull. 74(1-3):178-182, 2007.
Show BibTeX
@article{y_2007_effects_of_exposure_to_228,
  author = {Che Y and Sun H and Cui Y and Zhou D and Ma Y.},
  title = {Effects of exposure to 50 Hz magnetic field of 1 mT on the performance of detour learning task by chicks},
  year = {2007},
  
  url = {https://www.sciencedirect.com/science/article/abs/pii/S0361923007001955},
}

Quick Questions About This Study

The study used Lohmann brown domestic chicks.
The magnetic field was set at 1 mT intensity.
Exposure for 20 hours per day caused a significant impairment in detour learning, while 50 minutes per day had no effect.
The chicks were tested on a detour learning task.