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Impact of extremely low-frequency magnetic fields on human postural control

  • Sebastien Villard
  • Alicia Allen
  • Nicolas Bouisset
  • Michael Corbacio
  • Alex Thomas
  • Michel Guerraz
  • Alexandre Legros
Research Article
  • 46 Downloads

Abstract

Studies have found that extremely low-frequency (ELF, < 300 Hz) magnetic fields (MF) can modulate standing balance; however, the acute balance effects of high flux densities in this frequency range have not been systematically investigated yet. This study explores acute human standing balance responses of 22 participants exposed to magnetic induction at 50 and 100 mTrms (MF), and to 1.5 mA alternating currents (AC). The center of pressure displacement (COP) was collected and analyzed to investigate postural modulation. The path length, the area, the velocity, the power spectrum in low (< 0.5 Hz) and medium (0.5–2 Hz) bands have computed and showed the expected effect of the positive control direct current (DC) electric stimulation but failed to show any significant effect of the time-varying stimulations (AC and MF). However, we showed a significant biased stabilization effect on postural data from the custom experimental apparatus employed in this work, which might have neutralized the hypothesized results.

Keywords

ELF MF Humans Postural control Acute effect 

Abbreviations

AC

Alternative current

ANOVA

Analysis of variance

BPPV

Benign paroxysmal positional vertigo

COP

Center of pressure

DC

Direct current

E-fields

Electric field

ELF

Extremely low-frequency

GVS

Galvanic vestibular stimulation

HFB

High frequency band

ICES

International Committee on Electromagnetic Safety

ICNIRP

International Commission for Non-Ionizing Radiation Protection

IEEE

Institute of Electrical and Electronics Engineers

LFB

Low frequency band

MF

Magnetic field

MFB

Medium frequency band

Notes

Acknowledgements

The authors thank Mr. Lynn Keenliside for his technical assistance and Mr. Rob Kavet for his expertise and assistance in the revision of this manuscript. This project was supported by: Hydro-Québec (Canada) EDF-RTE (France), NationalGrid and Energy Network Association (UK), Electric Power Research Institute (EPRI–USA) and Lawson Internal Research funding. This work was also supported by MITACS through the MITACS-Accelerate Program. The funders had no role in study design, data collection and analysis, decision to publish, study approvals, or preparation of the manuscript.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Lawson Health Research Institute, St. Joseph HospitalLondonCanada
  2. 2.Medical BiophysicsWestern UniversityLondonCanada
  3. 3.School of KinesiologyWestern UniversityLondonCanada
  4. 4.Laboratoire de Psychologie et NeurocognitionUniversité Savoie Mont-BlancChambéryFrance
  5. 5.EuroMov, Université de MontpellierMontpellierFrance

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