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Qualitative and quantitative assessment of magnetic vestibular stimulation in humans

Dewey, Rebecca S; Gomez, Rachel; Degg, Chris; Baguley, David M; Glover, Paul

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Authors

Rachel Gomez

Chris Degg

David M Baguley

PAUL GLOVER paul.glover@nottingham.ac.uk
Associate Professor



Abstract

The sensation of phantom motion or exhibition of bodily sway is often reported in the proximity of an MR scanner. It is proposed that the magnetic field stimulates the vestibular system. There are a number of possible mechanisms responsible, and the relative contributions of susceptibility on the otolithic receptors and the Lorentz force on the cupulae have not yet been explored. This exploratory study aims to investigate the impact of being in the proximity of a 7.0 T MR scanner. The modified clinical test of sensory interaction on balance (mCTSIB) was used to qualitatively ascertain whether or not healthy control subjects who passed the mCTSIB in normal conditions 1) experienced subjective sensations of dizziness, vertigo or of leaning or shifting in gravity when in the magnetic field and 2) exhibited visibly increased bodily sway whilst in the magnetic field compared to outside the magnetic field. Condition IV of the mCTSIB was video recorded outside and inside the magnetic field, providing a semi-quantitative measure of sway.
For condition IV of the mCTSIB (visual and proprioceptive cues compromised), all seven locations/orientations around the scanner yielded significantly more sway than at baseline (p

Journal Article Type Article
Acceptance Date Nov 8, 2020
Online Publication Date Dec 16, 2020
Publication Date Dec 16, 2020
Deposit Date Nov 10, 2020
Publicly Available Date Dec 16, 2020
Journal Journal of Vestibular Research
Print ISSN 0957-4271
Electronic ISSN 1878-6464
Publisher IOS Press
Peer Reviewed Peer Reviewed
Volume 30
Issue 6
Pages 353-361
DOI https://doi.org/10.3233/VES-201538
Keywords vestibular; magnetic resonance imaging
Public URL https://nottingham-repository.worktribe.com/output/5032717
Publisher URL https://content.iospress.com/articles/journal-of-vestibular-research/ves201538

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