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Influence of prolonged bed-rest on spectral and temporal electromyographic motor control characteristics in the superficial lumbo-pelvic musculature

Belavy, Daniel Ludovic and Ng, Joseph K.-F. and Wilson, Stephen J. and Armbrecht, Gabriele and Stegeman, Dick and Rittweger, Jörn and Felsenberg, Dieter and Richardson, Carolyn A. (2010) Influence of prolonged bed-rest on spectral and temporal electromyographic motor control characteristics in the superficial lumbo-pelvic musculature. Journal of Electromyography and Kinesiology, 20 (1), pp. 170-179.

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Abstract

Little is known about the motor control of the lumbo-pelvic musculature in microgravity and its simulation (bed-rest). Analysis of spectral and temporal electromyographic variables can provide information on motor control relevant for normal function. This study examined the effect of 56-days of bed-rest with 1-year follow-up in 10 male subjects on the median frequency and the activation timing in surface electromyographic recordings from five superficial lumbo-pelvic muscles during a repetitive knee movement task. Trunk fat mass (from whole body-composition measurements) and movement accuracy as possible explanatory factors were included. Increased median frequency was observed in the lumbar erector spinae starting late in bed-rest, but this was not seen in its synergist, the thoracic erector spinae (p < .0001). These changes persisted up to 1-year after bed-rest and were independent of changes in body-composition or movement accuracy. Analysis suggested decreases of median frequency (p < .0001) in the abdominal and gluteal muscles to result from increased (p < .01) trunk fat levels during and after bed-rest. No changes in lumbo-pelvic muscle activation timing were seen. The results suggest that bed-rest particularly affects the shorter lumbar erector spinae and that the temporal sequencing of superficial lumbo-pelvic muscle activation is relatively robust

Document Type:Article
Title:Influence of prolonged bed-rest on spectral and temporal electromyographic motor control characteristics in the superficial lumbo-pelvic musculature
Authors:
AuthorsInstitution or Email of Authors
Belavy, Daniel LudovicCharité Campus Benjamin Franklin
Ng, Joseph K.-F.Hong Kong Polytechnic University
Wilson, Stephen J.University of Queensland
Armbrecht, GabrieleCharité Campus Benjamin Franklin
Stegeman, DickRadboud University Nijmegen
Rittweger, JörnManchester Metropolitan University
Felsenberg, DieterCharité Campus Benjamin Franklin
Richardson, Carolyn A.University of Queensland
Date:2010
Journal or Publication Title:Journal of Electromyography and Kinesiology
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:20
Page Range:pp. 170-179
Status:Published
Keywords:Spaceflight, Spine, Berlin bed-rest study, Median frequency, Motor control
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Integrative Studien (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Space Physiology
Deposited By: Jörn Rittweger
Deposited On:28 Apr 2010 12:23
Last Modified:07 Feb 2013 20:12

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