Influence of galvanic vestibular stimulation on postural recovery during sudden falls.

Experimental Brain Research
S B BortolamiJ R Lackner

Abstract

To assess vestibular influences on recovery of balance during sudden falls, we measured the postural responses of five healthy subjects to a hold and release perturbation coupled with galvanic vestibular stimulation (GVS). Two electrode pairs were located with the anterior electrode of each pair over the mastoid process and the posterior electrode over the trapezius muscle on the same side. Bilateral unipolar GVS was generated 60 ms after a holding force against the sternum was released by individually driving left and right electrode pairs as cathode or anode at 1 mA for 12 s or 2 mA for 6 s. We computed the frequency and damping parameters of a multi-link inverted pendulum model of the body which best fit the transient postural oscillations after release for each subject. These parameters did not differ significantly across conditions indicating the GVS did not modify the preset overall strategy of postural recovery. The intensity and polarity of GVS significantly biased both the postural lean during the oscillatory period and the resting postural stance achieved during stimulation, deviating them forward for cathodal stimulation and backward for anodal. The residuals of the multi-link fit, the frequency spectra of the actual...Continue Reading

References

Jun 8, 1999·The Journal of Physiology·R C FitzpatrickJ L Taylor
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Aug 13, 2002·Advances in Experimental Medicine and Biology·Brian L DayJonathan Cole
Aug 17, 2002·Brain : a Journal of Neurology·Brian L Day, Jonathan Cole
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Dec 25, 2002·Neuroreport·Richard C FitzpatrickBrian L Day
Jun 18, 2003·Experimental Brain Research·S B BortolamiJ R Lackner
May 11, 2004·Journal of Applied Physiology·Richard C Fitzpatrick, Brian L Day
Oct 19, 2004·Experimental Brain Research·Anatol G Feldman, Mark L Latash
Aug 8, 2006·Current Biology : CB·Richard C FitzpatrickBrian L Day

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Citations

Apr 4, 2019·Journal of Neurophysiology·Avijit BakshiJames R Lackner
Oct 1, 2020·Journal of Neurophysiology·Avijit BakshiJames R Lackner

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