Laboratoire de Physiologie de l'Exercice - EA 4338, Faculté de Médecine 15 rue Ambroise Paré 42023 Saint-Etienne Cedex 2, France.
Neurosci Lett. 2013 Feb 8;534:264-8. doi: 10.1016/j.neulet.2012.12.022. Epub 2012 Dec 27.
Our study meant to determine, for idiopathic scoliosis patients, the biomechanical processes involved in postural regulation when self-imposed disturbances occur in seated position in both directions during successive trials. 12 female adolescents with right thoracic scoliosis (SG) and 15 control adolescents (CG) were included in this study. Ground reaction forces were studied using a force platform while the subjects were maintaining their balance in sitting position on a seesaw. Every test is recorded with eyes opened, arms on shoulders and legs free. The force platform data (AP and ML forces data) obtained were processed to determine the following normalized force parameters: delta value (difference between maxima and minima), maximal and minimal force values (peak and occurrence), and the variability of AP and ML forces. We used a variance analysis (ANOVA test) to analyze and compare 3 trials and groups. Our results show that, whatever the directions of destabilization (AP versus ML), SG was always in a learning situation. Indeed, the first test is always less stable than the second and third trials. However, for CG, adaptability between the tests is only highlighted during ML imbalance. Significant differences of strategies between the groups are only visible for the AP force component. For all conditions imposed, scoliotic patients perform specific trunk balance strategies. Clinical tests and rehabilitation methods should include the learning effect within the spatio-temporal adaptation to ground reaction forces.
我们的研究旨在确定特发性脊柱侧凸患者在坐姿中自我施加的前后方向的干扰下，在连续试验中进行姿势调节的生物力学过程。 本研究纳入了 12 名右胸脊柱侧凸的女性青少年（SG）和 15 名对照组青少年（CG）。受试者坐在跷跷板上保持平衡时，使用力平台研究地面反作用力。每次测试均在睁眼、手臂放在肩膀上和腿部自由的情况下进行记录。平台数据（AP 和 ML 力数据）进行处理以确定以下标准化力参数：差值（最大值和最小值之间的差异）、最大和最小力值（峰值和出现），以及 AP 和 ML 力的可变性。我们使用方差分析（ANOVA 检验）分析和比较了 3 次试验和组间的差异。我们的结果表明，无论失稳方向（AP 还是 ML）如何，SG 始终处于学习状态。实际上，第一次测试总是不如第二和第三次测试稳定。然而，对于 CG，只有在 ML 不平衡时才会强调测试之间的适应性。仅在 AP 力分量上才能看到组间策略的显著差异。对于所有施加的条件，脊柱侧凸患者都表现出特定的躯干平衡策略。临床测试和康复方法应将学习效果纳入到对地面反作用力的时空适应中。
