Trunk control during repetitive sagittal movements following a real-time tracking task in people with chronic low back pain
Trunk control during repetitive sagittal movements following a real-time tracking task in people with chronic low back pain
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DOI：
10.1016/j.jelekin.2021.102533
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发表时间：
2021-02-20
影响因子：
2.5
通讯作者：
Falla, D.
中科院分区：
文献类型：
--
作者：
Alsubaie, A. M.;Martinez-Valdes, E.;Falla, D.
树干运动的精度通常是通过测试定位精度来检验的，而不是评估跟踪动态运动的精度。在这项研究中，我们使用3d运动捕捉系统来提供一种新颖的实时跟踪任务，以评估患有和不患有慢性非特异性腰痛（LBP）的人在不同运动速度下的躯干运动控制。11名无症状志愿者和15名慢性非特异性LBP患者在实时视觉反馈下进行了12个连续的躯干屈伸循环，在此期间，使用8台光电红外摄像机测量躯干运动。两组间反馈与实际躯干运动时间差异显著（P = 0.001）。两组在跟踪反馈时具有相似的跟踪准确性变异性（P < 0.05）。然而，慢速跟踪变异性与LBP患者的恐惧回避信念问卷（FABQ）得分相关（P = 0.03; r = 0.55）。本研究表明，无症状者和LBP患者均表现出预期行为，然而，与无症状组相比，LBP患者在跟踪视觉反馈方面的反应始终延迟。此外，在重复跟踪周期中跟踪准确性的可变性程度与LBP患者对运动的恐惧程度有关。
Precision of trunk movement has commonly been examined by testing relocation accuracy rather than evaluating accuracy of tracking dynamic movement. In this study we used a 3-D motion capture system to provide a novel real-time tracking task to assess trunk motor control at varying movement speeds between people with and without chronic non-specific low back pain (LBP). Eleven asymptomatic volunteers and 15 participants with chronic non-specific LBP performed 12 continuous cycles of trunk flexion-extension following real time visual feedback, during which, trunk motion was measured using eight optoelectronic infrared cameras. Significant time differences between the feedback and actual trunk motion were found between groups (P = 0.001). Both groups had similar variability of tracking accuracy when following the feedback (P > 0.05). However, tracking variability at a slow speed correlated (P = 0.03; r = 0.55) with the Fear-Avoidance Beliefs Questionnaire (FABQ) scores in those with LBP. This study shows that both asymptomatic people and individuals with LBP displayed anticipatory behaviour, however, the response of those with LBP was consistently delayed in tracking the visual feedback compared to the asymptomatic group. Additionally, the extent of variability of tracking accuracy over repeated tracking cycles was associated with the degree of fear of movement in people with LBP.