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Analysis of short- and long-term effects of adaptation in human postural control.

Fransson, Per-Anders LU ; Tjernström, Fredrik LU ; Hafström, Anna LU ; Magnusson, Måns LU and Johansson, Rolf LU (2002) In Biological Cybernetics 86(5). p.355-365
Abstract
The short-term (i.e., days) and long-term (i.e., months) effects of adaptation to posturography examinations were investigated in 12 normal subjects who were repeatedly examined for five consecutive days and again after 90 days. The examinations were conducted both with eyes open and closed, and the perturbations were evoked by a pseudorandomly applied vibration stimulation to the calf muscles. The evoked anteroposterior responses were analyzed with a method considering adaptation in the slow changes in posture and in the stimulus-response relationship. Repetition of examinations on a daily basis revealed a gradual improvement of postural-control performance. The body sway induced by the stimulation was significantly reduced and the... (More)
The short-term (i.e., days) and long-term (i.e., months) effects of adaptation to posturography examinations were investigated in 12 normal subjects who were repeatedly examined for five consecutive days and again after 90 days. The examinations were conducted both with eyes open and closed, and the perturbations were evoked by a pseudorandomly applied vibration stimulation to the calf muscles. The evoked anteroposterior responses were analyzed with a method considering adaptation in the slow changes in posture and in the stimulus-response relationship. Repetition of examinations on a daily basis revealed a gradual improvement of postural-control performance. The body sway induced by the stimulation was significantly reduced and the dynamical properties changed. Most of the improvements remained after 90 days, but some parameters such as the complexity of the control system used were increased to the initial level. The results confirm previous observations that postural control contains several partially independent adaptive processes, observed in terms of alteration of posture and as a progressive reduction of body sway induced by stimulation. The method used for the adaptation analysis in this study could be applied to analyze biological systems with multiple individual adaptive processes with different time courses or characteristics, or where the adaptation processes are related to multiple internal or external factors. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biological Cybernetics
volume
86
issue
5
pages
355 - 365
publisher
Springer
external identifiers
  • wos:000176047600003
  • pmid:11984650
  • scopus:0036583449
ISSN
1432-0770
DOI
10.1007/s00422-001-0305-y
language
English
LU publication?
yes
id
abcba8cf-dc4c-4267-9448-f387f8ce7208 (old id 107924)
alternative location
http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11984650&dopt=Abstract
date added to LUP
2007-06-21 14:30:31
date last changed
2017-01-01 04:53:18
@article{abcba8cf-dc4c-4267-9448-f387f8ce7208,
  abstract     = {The short-term (i.e., days) and long-term (i.e., months) effects of adaptation to posturography examinations were investigated in 12 normal subjects who were repeatedly examined for five consecutive days and again after 90 days. The examinations were conducted both with eyes open and closed, and the perturbations were evoked by a pseudorandomly applied vibration stimulation to the calf muscles. The evoked anteroposterior responses were analyzed with a method considering adaptation in the slow changes in posture and in the stimulus-response relationship. Repetition of examinations on a daily basis revealed a gradual improvement of postural-control performance. The body sway induced by the stimulation was significantly reduced and the dynamical properties changed. Most of the improvements remained after 90 days, but some parameters such as the complexity of the control system used were increased to the initial level. The results confirm previous observations that postural control contains several partially independent adaptive processes, observed in terms of alteration of posture and as a progressive reduction of body sway induced by stimulation. The method used for the adaptation analysis in this study could be applied to analyze biological systems with multiple individual adaptive processes with different time courses or characteristics, or where the adaptation processes are related to multiple internal or external factors.},
  author       = {Fransson, Per-Anders and Tjernström, Fredrik and Hafström, Anna and Magnusson, Måns and Johansson, Rolf},
  issn         = {1432-0770},
  language     = {eng},
  number       = {5},
  pages        = {355--365},
  publisher    = {Springer},
  series       = {Biological Cybernetics},
  title        = {Analysis of short- and long-term effects of adaptation in human postural control.},
  url          = {http://dx.doi.org/10.1007/s00422-001-0305-y},
  volume       = {86},
  year         = {2002},
}