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Dynamic performance of vibration induced anterior-posterior sway during upright posture in normal subjects

Magnusson, M LU and Johansson, R (1989) In Acta Oto-Laryngologica, Supplement 468. p.30-227
Abstract

Human postural control works as a dynamic feedback control system. The dynamic performance of postural control for anterior-posterior movements during upright posture are defined by three parameters. These parameters reflect the stiffness, the damping and the swiftness of a response to an induced perturbation. In the present study 23 normal subjects were investigated. Both with open and closed eyes, there was a negative correlation between swiftness and stiffness. With open eyes there was also a weak correlation between swiftness and damping. When the subjects were tested with open eyes there was a prominent and highly significant increase of stiffness and a reduction of swiftness of the responses. It was found that proprioceptive... (More)

Human postural control works as a dynamic feedback control system. The dynamic performance of postural control for anterior-posterior movements during upright posture are defined by three parameters. These parameters reflect the stiffness, the damping and the swiftness of a response to an induced perturbation. In the present study 23 normal subjects were investigated. Both with open and closed eyes, there was a negative correlation between swiftness and stiffness. With open eyes there was also a weak correlation between swiftness and damping. When the subjects were tested with open eyes there was a prominent and highly significant increase of stiffness and a reduction of swiftness of the responses. It was found that proprioceptive information from the calf muscles contributes in postural control of movements up to 1 Hz and visual information is important for movements up to 0.05 Hz. The present findings suggest that postural control changes dynamic strategies depending on the available sensory feedback.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Adolescent, Adult, Feedback, Humans, Middle Aged, Postural Balance, Posture, Vibration, Vision, Ocular, Journal Article
in
Acta Oto-Laryngologica, Supplement
volume
468
pages
4 pages
publisher
Scandinavian University Press
external identifiers
  • scopus:0024805018
ISSN
0365-5237
language
English
LU publication?
yes
id
760a8e9e-2d5a-4b54-9301-828fe93f4919
date added to LUP
2017-05-03 12:56:27
date last changed
2017-05-23 08:51:13
@article{760a8e9e-2d5a-4b54-9301-828fe93f4919,
  abstract     = {<p>Human postural control works as a dynamic feedback control system. The dynamic performance of postural control for anterior-posterior movements during upright posture are defined by three parameters. These parameters reflect the stiffness, the damping and the swiftness of a response to an induced perturbation. In the present study 23 normal subjects were investigated. Both with open and closed eyes, there was a negative correlation between swiftness and stiffness. With open eyes there was also a weak correlation between swiftness and damping. When the subjects were tested with open eyes there was a prominent and highly significant increase of stiffness and a reduction of swiftness of the responses. It was found that proprioceptive information from the calf muscles contributes in postural control of movements up to 1 Hz and visual information is important for movements up to 0.05 Hz. The present findings suggest that postural control changes dynamic strategies depending on the available sensory feedback.</p>},
  author       = {Magnusson, M and Johansson, R},
  issn         = {0365-5237},
  keyword      = {Adolescent,Adult,Feedback,Humans,Middle Aged,Postural Balance,Posture,Vibration,Vision, Ocular,Journal Article},
  language     = {eng},
  pages        = {30--227},
  publisher    = {Scandinavian University Press},
  series       = {Acta Oto-Laryngologica, Supplement},
  title        = {Dynamic performance of vibration induced anterior-posterior sway during upright posture in normal subjects},
  volume       = {468},
  year         = {1989},
}