Article Text

other Versions

PDF
Disrupted Working Body Schema Of The Trunk In People With Back Pain.
  1. Helen Bray1,
  2. G. Lorimer Moseley2,*
  1. 1 Royal Free and University College Medical School, University College London, London, United Kingdom;
  2. 2 Prince of Wales Medical Research Institute, Australia
  1. Correspondence to: Lorimer Moseley, Prince of Wales Medical Research Institute, Corner Easy & Barker Streets, Randwick, NSW 2031, Australia; lorimer.moseley{at}gmail.com

Abstract

Background: To test whether working body schema of the trunk is disrupted in people with back pain using a motor imagery task in which one decides whether a pictured model has their trunk rotated to the left or to the right. We hypothesised that chronic back pain is associated with reduced accuracy of left/right trunk rotation judgements.

Methods: Twenty-one patients with back pain and 14 controls completed two tasks, each involving two trials of 40 images: a left/right hand judgement task, which was used as a control task, and the left/right trunk rotation judgement task. Two (task) x three (group: bilateral back pain, unilateral back pain, control) ANOVAs were undertaken on mean RT and accuracy.

Results: RT was similar across participants and tasks (n.s.). Accuracy was not. Patients with bilateral back pain made more mistakes on the left/right trunk rotation task than patients with unilateral back pain did, who in turn made more mistakes on that task than controls did (Body Part x Group interaction; p<0.001). The mean (95% confidence interval) accuracy for left/right trunk rotation judgements was 53.4% (44.5 – 62.3%) for bilateral back pain patients, 67.2% (60.2 – 74.1%) for unilateral back pain patients and 87% (75 – 98%) for control participants. This pattern was not observed on the left/right hand judgement task, on which all three groups made correct judgements about 83% of the time (n.s.).

Discussion: Chronic back pain is associated with disruption of the working body schema of the trunk. This might be an important contributor to motor control abnormalities seen in this population.

Statistics from Altmetric.com

Footnotes

    Request permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.