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Brain & Nervous System

Disturbance of the magnetic field did not affect spatial memory.

No Effects Found

Li Y, Zhang C, Song T. · 2014

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This 90-day study found no memory impairment in rats exposed to 100 microT magnetic fields, levels similar to close appliance exposure.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to 50 Hz magnetic fields at 100 microT (similar to levels near some electrical appliances) for 90 days while testing their spatial memory and learning abilities using a water maze. The magnetic field exposure did not impair the rats' ability to learn or remember spatial tasks, nor did it interfere with improvements from previous training. This suggests that this level of extremely low frequency magnetic field exposure does not harm basic learning and memory functions.

Exposure Information

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

The study examined exposure from: 50 Hz Duration: 90 day

Study Details

This study aims to evaluate the effects of previous training and ELF-MF exposure on learning and memory using the Morris water maze (MWM).

Sprague-Dawley rats were subjected to MWM training, ELF-MF exposure (50 Hz, 100 microT), or ELF-MF e...

The data show that the rats exposed to training and ELF-MF with training performed better on spatial...

Cite This Study
Li Y, Zhang C, Song T. (2014). Disturbance of the magnetic field did not affect spatial memory. Physiol Res 2014; 63 (3): 377-385.
Show BibTeX
@article{y_2014_disturbance_of_the_magnetic_2829,
  author = {Li Y and Zhang C and Song T.},
  title = {Disturbance of the magnetic field did not affect spatial memory.},
  year = {2014},
  
  url = {https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.445.1360&rep=rep1&type=pdf},
}

Quick Questions About This Study

A 2014 study found that 90-day exposure to 50 Hz magnetic fields at 100 microT did not impair spatial memory or learning in rats. The magnetic field exposure showed no significant differences compared to control groups in water maze tests.
Research shows that 50 Hz electromagnetic field exposure does not interfere with learning improvements from previous training. Rats maintained their enhanced spatial acquisition abilities even after 90 days of continuous magnetic field exposure at household appliance levels.
A 90-day rat study found that 100 microT magnetic field exposure (similar to levels near electrical appliances) did not harm basic learning and memory functions. Spatial memory performance remained unchanged compared to unexposed control animals.
Researchers safely exposed rats to 50 Hz magnetic fields for 90 continuous days without observing memory impairment. This extended exposure period at 100 microT showed no significant effects on spatial learning or memory retention capabilities.
Magnetic field levels similar to those near household electrical appliances (100 microT at 50 Hz) did not affect rat brain function in spatial memory tests. The 2014 study found no cognitive impairment after three months of exposure.