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

Belavý, Daniel L., Ng, Joseph K. F., Wilson, Stephen J., Armbrecht, Gabriele, Stegeman, Dick F., Rittweger, Jorn, Felsenberg, Dieter and Richardson, Carolyn A. 2010, Influence of prolonged bed-rest on spectral and temporal electromyographic motor control characteristics of the superficial lumbo-pelvic musculature, Journal of electromyography and kinesiology, vol. 20, no. 1, pp. 170-179, doi: 10.1016/j.jelekin.2009.03.006.

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Title Influence of prolonged bed-rest on spectral and temporal electromyographic motor control characteristics of the superficial lumbo-pelvic musculature
Author(s) Belavý, Daniel L.ORCID iD for Belavý, Daniel L. orcid.org/0000-0002-9307-832X
Ng, Joseph K. F.
Wilson, Stephen J.
Armbrecht, Gabriele
Stegeman, Dick F.
Rittweger, Jorn
Felsenberg, Dieter
Richardson, Carolyn A.
Journal name Journal of electromyography and kinesiology
Volume number 20
Issue number 1
Start page 170
End page 179
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2010-02
ISSN 1873-5711
Keyword(s) Science & Technology
Life Sciences & Biomedicine
Neurosciences
Physiology
Rehabilitation
Sport Sciences
Neurosciences & Neurology
REHABILITATION, SCI
Spaceflight
Spine
Berlin bed-rest study
Median frequency
Motor control
NEUROMUSCULAR ACTIVATION PATTERNS
RESISTIVE VIBRATION EXERCISE
ISOMETRIC AXIAL ROTATION
MUSCLE-ACTIVITY
LUMBAR SPINE
SURFACE-EMG
SKILL ACQUISITION
TREADMILL WALKING
POSTURAL CONTROL
TRUNK MUSCLES
Summary 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.
Language eng
DOI 10.1016/j.jelekin.2009.03.006
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
Socio Economic Objective 920299 Health and Support Services not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2010, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30071040

Document type: Journal Article
Collection: School of Exercise and Nutrition Sciences
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