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Short and long-term postural learning to withstand galvanic vestibular perturbations.

Tjernström, Fredrik LU ; Bagheri, Ali; Fransson, Per-Anders LU and Magnusson, Måns LU (2010) In Journal of Vestibular Research: Equilibrium and Orientation 20(6). p.407-417
Abstract
We investigated changes of postural responses to repeated bipolar galvanic vestibular stimulation on 5 consecutive days and once again after 3 months. Subjects consisted of 21 healthy volunteers. Except for the first day did the induced torque variance in response to galvanic vestibular stimulation not decrease {within} each test session, but there was a major reduction {from day to day} (p< 0.001) reflecting a continued processing of the postural experience gained during the stimulation. The decreased end level magnitude of postural responses after 5 days was retained after 3 months. The galvanic stimulation failed to induce larger torque variance compared to quiet stance toward the end of the 5 days as well as after 3 months,... (More)
We investigated changes of postural responses to repeated bipolar galvanic vestibular stimulation on 5 consecutive days and once again after 3 months. Subjects consisted of 21 healthy volunteers. Except for the first day did the induced torque variance in response to galvanic vestibular stimulation not decrease {within} each test session, but there was a major reduction {from day to day} (p< 0.001) reflecting a continued processing of the postural experience gained during the stimulation. The decreased end level magnitude of postural responses after 5 days was retained after 3 months. The galvanic stimulation failed to induce larger torque variance compared to quiet stance toward the end of the 5 days as well as after 3 months, indicating a down-regulation of a repeated erroneous vestibular stimulation by the postural control system - i.e. sensory reweighting. This argues that a major adaptation effect to galvanic vestibular perturbation takes place after the exposure to the stimulation - similar to the concept of the consolidation process involved in motor learning. This should be considered when repeatedly assessing vestibular function both clinically and in studies. It implies that sensory training involved in rehabilitation from vestibular diseases/deficiencies should be executed with spaced intervals in order to procure more efficient learning processes and in the end, a better function. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Vestibular Research: Equilibrium and Orientation
volume
20
issue
6
pages
407 - 417
publisher
IOS Press
external identifiers
  • WOS:000285808400002
  • PMID:21248403
  • Scopus:79551715699
ISSN
1878-6464
DOI
10.3233/VES-2010-0391
language
English
LU publication?
yes
id
915514d4-6b05-43cf-ad00-d69951fef704 (old id 1777280)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/21248403?dopt=Abstract
date added to LUP
2011-02-01 15:02:25
date last changed
2016-11-10 14:30:32
@misc{915514d4-6b05-43cf-ad00-d69951fef704,
  abstract     = {We investigated changes of postural responses to repeated bipolar galvanic vestibular stimulation on 5 consecutive days and once again after 3 months. Subjects consisted of 21 healthy volunteers. Except for the first day did the induced torque variance in response to galvanic vestibular stimulation not decrease {within} each test session, but there was a major reduction {from day to day} (p&lt; 0.001) reflecting a continued processing of the postural experience gained during the stimulation. The decreased end level magnitude of postural responses after 5 days was retained after 3 months. The galvanic stimulation failed to induce larger torque variance compared to quiet stance toward the end of the 5 days as well as after 3 months, indicating a down-regulation of a repeated erroneous vestibular stimulation by the postural control system - i.e. sensory reweighting. This argues that a major adaptation effect to galvanic vestibular perturbation takes place after the exposure to the stimulation - similar to the concept of the consolidation process involved in motor learning. This should be considered when repeatedly assessing vestibular function both clinically and in studies. It implies that sensory training involved in rehabilitation from vestibular diseases/deficiencies should be executed with spaced intervals in order to procure more efficient learning processes and in the end, a better function.},
  author       = {Tjernström, Fredrik and Bagheri, Ali and Fransson, Per-Anders and Magnusson, Måns},
  issn         = {1878-6464},
  language     = {eng},
  number       = {6},
  pages        = {407--417},
  publisher    = {ARRAY(0x876f158)},
  series       = {Journal of Vestibular Research: Equilibrium and Orientation},
  title        = {Short and long-term postural learning to withstand galvanic vestibular perturbations.},
  url          = {http://dx.doi.org/10.3233/VES-2010-0391},
  volume       = {20},
  year         = {2010},
}