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European Journal of Applied Physiology

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01-12-2014 | Original Article

Trunk motor variability in patients with non-specific chronic low back pain

Authors: Jacques Abboud, François Nougarou, Isabelle Pagé, Vincent Cantin, Daniel Massicotte, Martin Descarreaux

Published in: European Journal of Applied Physiology | Issue 12/2014

Abstract

Purpose

To identify and characterize trunk neuromuscular adaptations during muscle fatigue in patients with chronic low back pain (LBP) and healthy participants.

Methods

Forty-six patients with non-specific chronic LBP and 23 healthy controls were asked to perform a trunk muscles fatigue protocol. Surface electromyography was recorded using two adhesive matrix of 64 electrodes applied bilaterally over the erector spinae. Pain score, kinesiophobia and physical disability were analyzed through different questionnaires. To characterize motor variability, dispersion of muscular activity center of gravity was computed. Motor variability between groups was compared using repeated-measures analyses of variance.

Results

Score of disability and kinesiophobia were significantly higher in patients with LBP. Results indicated a significant group effect characterized by an increased motor variability in the healthy group through the entire fatigue task on the left (p = 0.003) and right side (p = 0.048). Interestingly, increasing muscle fatigue led to increased motor variability in both groups (on both sides (p < 0.001) but with a greater increase in the healthy group.

Conclusion

Muscle recruitment is altered in patients with chronic LBP in the presence of muscle fatigue. Consequently, these patients exhibit changes in muscle recruitment pattern and intensity (lower levels of motor variability) during sustained isometric contraction that may be attributed to variation in the control of motor units within and between muscles. However, patients with LBP are able to increase their motor variability over time but with a lower increase compared to healthy participants.

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Title: Trunk motor variability in patients with non-specific chronic low back pain
Authors: Jacques Abboud
François Nougarou
Isabelle Pagé
Vincent Cantin
Daniel Massicotte
Martin Descarreaux
Publication date: 01-12-2014
Publisher: Springer Berlin Heidelberg
Published in: European Journal of Applied Physiology / Issue 12/2014
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-014-2985-8

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Trunk motor variability in patients with non-specific chronic low back pain

Abstract

Purpose

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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