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Experimental Study of Adaptation and Postural Control after Sleep Deprivation

Almbladh, Per (2005) In MSc Theses
Department of Automatic Control
Abstract
This thesis investigates the influence of sleep deprivation on the human's postural control and conceptions of adaptation. Seventeen subjects were investigated with posturography after 24 h and 36 h of sleep deprivation, and a control posturography trial was performed either one week before or one week after the sleep deprivation trials. Stabilizing torques and forces were recorded by a force platform and the body sway was recorded by a 3D ultrasonic positioning system. Stimulation according to a pseudo random binary sequence (PRBS) was applied using two vibrators attached to the calf muscles of the subjects. Posturographic tests were performed with eyes open and eyes closed. Subspace based modeling was used to assess postural control... (More)
This thesis investigates the influence of sleep deprivation on the human's postural control and conceptions of adaptation. Seventeen subjects were investigated with posturography after 24 h and 36 h of sleep deprivation, and a control posturography trial was performed either one week before or one week after the sleep deprivation trials. Stabilizing torques and forces were recorded by a force platform and the body sway was recorded by a 3D ultrasonic positioning system. Stimulation according to a pseudo random binary sequence (PRBS) was applied using two vibrators attached to the calf muscles of the subjects. Posturographic tests were performed with eyes open and eyes closed. Subspace based modeling was used to assess postural control after sleep deprivation. Also, quantitative variance and correlation analysis were applied to the recorded data. The results of the investigation showed that it is possible to identify MIMO models with stimulus as input signal and torques and body sway as output signals. When body sway is characterized by the variance of the position data, statistical evidence was found for an increase of body sway after 24 hours of sleep deprivation. Also, sleep deprivation impairs postural adaptation. (Less)
Please use this url to cite or link to this publication:
author
Almbladh, Per
supervisor
organization
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
Postural control, sleep deprivation, adaptation, subspace identification, posturography
publication/series
MSc Theses
report number
TFRT-5755
ISSN
0280-5316
language
English
id
8847950
date added to LUP
2016-03-18 09:54:16
date last changed
2016-03-18 09:54:16
@misc{8847950,
  abstract     = {{This thesis investigates the influence of sleep deprivation on the human's postural control and conceptions of adaptation. Seventeen subjects were investigated with posturography after 24 h and 36 h of sleep deprivation, and a control posturography trial was performed either one week before or one week after the sleep deprivation trials. Stabilizing torques and forces were recorded by a force platform and the body sway was recorded by a 3D ultrasonic positioning system. Stimulation according to a pseudo random binary sequence (PRBS) was applied using two vibrators attached to the calf muscles of the subjects. Posturographic tests were performed with eyes open and eyes closed. Subspace based modeling was used to assess postural control after sleep deprivation. Also, quantitative variance and correlation analysis were applied to the recorded data. The results of the investigation showed that it is possible to identify MIMO models with stimulus as input signal and torques and body sway as output signals. When body sway is characterized by the variance of the position data, statistical evidence was found for an increase of body sway after 24 hours of sleep deprivation. Also, sleep deprivation impairs postural adaptation.}},
  author       = {{Almbladh, Per}},
  issn         = {{0280-5316}},
  language     = {{eng}},
  note         = {{Student Paper}},
  series       = {{MSc Theses}},
  title        = {{Experimental Study of Adaptation and Postural Control after Sleep Deprivation}},
  year         = {{2005}},
}