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Changes in multi-segmented body movements and EMG activity while standing on firm and foam support surfaces.

Fransson, Per-Anders LU ; Gomez, S; Patel, Mitesh LU and Johansson, L (2007) In European Journal of Applied Physiology 101(1). p.81-89
Abstract
Postural control ensures stability during both static posture and locomotion by initiating corrective adjustments in body movement. This is particularly important when the conditions of the support surface change. We investigated the effects of standing on a compliant foam surface using 12 normal subjects (mean age 26 years) in terms of: linear movements at the head, shoulder, hip and knee; EMG activity of the tibialis anterior and gastrocnemius muscles and torques towards the support surface. As subjects repeated the trials with eyes open or closed, we were also able to determine the effects of vision on multi-segmented body movements during standing upon different support surface conditions. As expected, EMG activity, torque variance... (More)
Postural control ensures stability during both static posture and locomotion by initiating corrective adjustments in body movement. This is particularly important when the conditions of the support surface change. We investigated the effects of standing on a compliant foam surface using 12 normal subjects (mean age 26 years) in terms of: linear movements at the head, shoulder, hip and knee; EMG activity of the tibialis anterior and gastrocnemius muscles and torques towards the support surface. As subjects repeated the trials with eyes open or closed, we were also able to determine the effects of vision on multi-segmented body movements during standing upon different support surface conditions. As expected, EMG activity, torque variance values and body movements at all measured positions increased significantly when standing on foam compared with the firm surface. Linear knee and hip movements increased more, relative to shoulder and head movements while standing on foam. Vision stabilized the head and shoulder movements more than hip and knee movements while standing on foam support surface. Moreover, vision significantly reduced the tibialis anterior EMG activity and torque variance during the trials involving foam. In conclusion, the foam support surface increased corrective muscle and torque activity, and changed the firm-surface multi-segmented body movement pattern. Vision improved the ability of postural control to handle compliant surface conditions. Several essential features of postural control have been found from recording movements from multiple points on the body, synchronized with recording torque and EMG. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
human standing, posturography, vision, firm, foam, EMG
in
European Journal of Applied Physiology
volume
101
issue
1
pages
81 - 89
publisher
Springer
external identifiers
  • wos:000249100000010
  • scopus:34548235785
ISSN
1439-6327
DOI
10.1007/s00421-007-0476-x
language
English
LU publication?
yes
id
4cb939e8-379b-4ac6-8164-96ec029ffaa9 (old id 168289)
date added to LUP
2007-07-13 14:08:04
date last changed
2017-07-02 03:35:04
@article{4cb939e8-379b-4ac6-8164-96ec029ffaa9,
  abstract     = {Postural control ensures stability during both static posture and locomotion by initiating corrective adjustments in body movement. This is particularly important when the conditions of the support surface change. We investigated the effects of standing on a compliant foam surface using 12 normal subjects (mean age 26 years) in terms of: linear movements at the head, shoulder, hip and knee; EMG activity of the tibialis anterior and gastrocnemius muscles and torques towards the support surface. As subjects repeated the trials with eyes open or closed, we were also able to determine the effects of vision on multi-segmented body movements during standing upon different support surface conditions. As expected, EMG activity, torque variance values and body movements at all measured positions increased significantly when standing on foam compared with the firm surface. Linear knee and hip movements increased more, relative to shoulder and head movements while standing on foam. Vision stabilized the head and shoulder movements more than hip and knee movements while standing on foam support surface. Moreover, vision significantly reduced the tibialis anterior EMG activity and torque variance during the trials involving foam. In conclusion, the foam support surface increased corrective muscle and torque activity, and changed the firm-surface multi-segmented body movement pattern. Vision improved the ability of postural control to handle compliant surface conditions. Several essential features of postural control have been found from recording movements from multiple points on the body, synchronized with recording torque and EMG.},
  author       = {Fransson, Per-Anders and Gomez, S and Patel, Mitesh and Johansson, L},
  issn         = {1439-6327},
  keyword      = {human standing,posturography,vision,firm,foam,EMG},
  language     = {eng},
  number       = {1},
  pages        = {81--89},
  publisher    = {Springer},
  series       = {European Journal of Applied Physiology},
  title        = {Changes in multi-segmented body movements and EMG activity while standing on firm and foam support surfaces.},
  url          = {http://dx.doi.org/10.1007/s00421-007-0476-x},
  volume       = {101},
  year         = {2007},
}