Using low levels of stochastic vestibular stimulation to improve locomotor stability

Frontiers in Systems Neuroscience
A P MulavaraJ J Bloomberg

Abstract

Low levels of bipolar binaural white noise based imperceptible stochastic electrical stimulation to the vestibular system (stochastic vestibular stimulation, SVS) have been shown to improve stability during balance tasks in normal, healthy subjects by facilitating enhanced information transfer using stochastic resonance (SR) principles. We hypothesize that detection of time-critical sub-threshold sensory signals using low levels of bipolar binaural SVS based on SR principles will help improve stability of walking during support surface perturbations. In the current study 13 healthy subjects were exposed to short continuous support surface perturbations for 60 s while walking on a treadmill and simultaneously viewing perceptually matched linear optic flow. Low levels of bipolar binaural white noise based SVS were applied to the vestibular organs. Multiple trials of the treadmill locomotion test were performed with stimulation current levels varying in the range of 0-1500 μA, randomized across trials. The results show that subjects significantly improved their walking stability during support surface perturbations at stimulation levels with peak amplitude predominantly in the range of 100-500 μA consistent with the SR phenomenon....Continue Reading

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Citations

Jun 10, 2016·Journal of the Royal Society, Interface·John MiltonTamás Insperger
Oct 12, 2018·PloS One·Vincent KoppelmansRachael D Seidler
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Jul 10, 2021·The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques·Amitabh BhattacharyaKaviraja Udupa

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