Determining the direction of vestibular-evoked balance responses using stochastic vestibular stimulation.

J Physiol

Sobell Department of Motor Neuroscience and Movement Disorders, University College London Institute of Neurology, 33 Queen Square, London WC1N 3BG, UK.

Published: June 2009

AI Article Synopsis

  • Stochastic vestibular stimulation (SVS) is a promising method for studying vestibulo-motor function, outperforming galvanic vestibular stimulation in certain aspects.
  • There is a significant gap in techniques to extract directional information from the motor responses triggered by SVS, which is crucial for understanding brain spatial transformation processes.
  • The authors propose a new method to determine the direction of SVS-evoked balance responses by analyzing the correlation between a random current waveform and ground-reaction shear force.

Article Abstract

As a tool for investigating vestibulo-motor function, stochastic vestibular stimulation (SVS) has some advantages over galvanic vestibular stimulation. However, there is no technique currently available for extracting direction information from SVS-evoked motor responses. It is essential to be able to measure the direction of response if one wishes to investigate the operation of key spatial transformation processes in the brain. Here we describe and validate a technique for determining the direction of SVS-evoked balance responses based on the correlation between a random waveform of stimulating current and ground-reaction shear force.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2718246PMC
http://dx.doi.org/10.1113/jphysiol.2009.171256DOI Listing

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