@article{Christe:9318,
      recid = {9318},
      author = {Christe, Guillaume and Aussems, Camille and Jolles,  Brigitte M. and Favre, Julien},
      title = {Patients with chronic low back pain have an individual  movement signature : a comparison of angular amplitude,  angular velocity and muscle activity across multiple  functional tasks},
      journal = {Frontiers in bioengineering and biotechnology},
      address = {2021-11},
      number = {ARTICLE},
      pages = {13 p.},
      abstract = {Despite a large body of evidence demonstrating spinal  movement alterations in individuals with chronic low back  pain (CLBP), there is still a lack of understanding of the  role of spinal movement behavior on LBP symptoms  development or recovery. One reason for this may be that  spinal movement has been studied during various functional  tasks without knowing if the tasks are interchangeable,  limiting data consolidation steps. The first objective of  this cross-sectional study was to analyze the influence of  the functional tasks on the information carried by spinal  movement measures. To this end, we first analyzed the  relationships in spinal movement between various functional  tasks in patients with CLBP using Pearson correlations.  Second, we compared the performance of spinal movement  measures to differentiate patients with CLBP from  asymptomatic controls among tasks. The second objective of  the study was to develop task-independent measures of  spinal movement and determine the construct validity of the  approach. Five functional tasks primarily involving  sagittal-plane movement were recorded for 52 patients with  CLBP and 20 asymptomatic controls. Twelve measures were  used to describe the sagittal-plane angular amplitude and  velocity at the lower and upper lumbar spine as well as the  activity of the erector spinae. Correlations between tasks  were statistically significant in 91 out of 99 cases (0.31  ≤ r ≤ 0.96, all p < 0.05). The area under the curve (AUC)  to differentiate groups did not differ substantially  between tasks in most of the comparisons (82% had a  difference in AUC of ≤0.1). The task-independent measures  of spinal movement demonstrated equivalent or higher  performance to differentiate groups than functional tasks  alone. In conclusion, these findings support the existence  of an individual spinal movement signature in patients with  CLBP, and a limited influence of the tasks on the  information carried by the movement measures, at least for  the twelve common sagittal-plane measures analysed in this  study. Therefore, this work brought critical insight for  the interpretation of data in literature reporting  differing tasks and for the design of future studies. The  results also supported the construct validity of  task-independent measures of spinal movement and encouraged  its consideration in the future.},
      url = {http://arodes.hes-so.ch/record/9318},
      doi = {https://doi.org/10.3389/fbioe.2021.767974},
}