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Brain & Nervous System

Measurement of visual evoked potential during and after periods of pulsed magnetic field exposure.

No Effects Found

Glover PM, Eldeghaidy S, Mistry TR, Gowland PA. · 2007

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Strong pulsed magnetic fields from MRI-level equipment showed no immediate effects on brain visual processing in this controlled study.

Plain English Summary

Summary written for general audiences

Researchers exposed seven people to strong pulsed magnetic fields (similar to those in MRI machines) while measuring their brain's visual processing responses. They found no significant changes in how the brain processed visual information during or after the 10-minute exposure. This contradicts some earlier studies that found effects from different types of magnetic field exposure.

Study Details

To study the effect of switched magnetic fields used in MR scanners on the visual evoked potential (VEP) in human subjects.

We have used an MRI gradient coil, remote from an MRI magnet to produce a time‐varying magnetic fiel...

In contradiction to studies previously reported in the literature for fields of 50 Hz and 60 mT, no ...

Switched magnetic fields of a level and frequency comparable to those used in MRI do not have a significant effect on primary retinal or visual processing

Cite This Study
Glover PM, Eldeghaidy S, Mistry TR, Gowland PA. (2007). Measurement of visual evoked potential during and after periods of pulsed magnetic field exposure. J Magn Reson Imaging. 26(5):1353-1356, 2007.
Show BibTeX
@article{pm_2007_measurement_of_visual_evoked_2827,
  author = {Glover PM and Eldeghaidy S and Mistry TR and Gowland PA.},
  title = {Measurement of visual evoked potential during and after periods of pulsed magnetic field exposure.},
  year = {2007},
  doi = {10.1002/jmri.21155},
  url = {https://onlinelibrary.wiley.com/doi/full/10.1002/jmri.21155},
}
DOI: 10.1002/jmri.21155

Cited By (12 papers)

Quick Questions About This Study

A 2007 study found that strong pulsed magnetic fields similar to those in MRI machines do not significantly affect how the brain processes visual information. Seven participants showed no changes in brain responses during or after 10-minute exposures to these magnetic fields.
Research indicates that pulsed magnetic fields at MRI-level strength do not impair visual processing in the brain. A controlled study measuring brain responses found no significant effects on how participants processed visual information during magnetic field exposure.
Current evidence suggests pulsed magnetic fields at MRI strength levels are not harmful to brain function. A 2007 study found no significant changes in visual brain responses when people were exposed to strong pulsed magnetic fields for 10 minutes.
Strong pulsed magnetic fields do not appear to affect primary visual processing, according to research. A study exposing participants to MRI-level magnetic fields found no significant impact on retinal function or visual brain responses during or after exposure.
Studies suggest minimal brain risks from strong pulsed magnetic fields like those in MRI machines. Research found no significant effects on visual brain processing when people were exposed to these fields, contradicting some earlier studies with different field types.