Time-to-contact and multiscale entropy identify differences in postural control in adolescent idiopathic scoliosis
Time-to-contact and multiscale entropy identify differences in postural control in adolescent idiopathic scoliosis
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DOI：
10.1016/j.gaitpost.2011.02.015
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发表时间：
2011-05-01
期刊：
影响因子：
2.4
通讯作者：
Hamill, Joseph
中科院分区：
文献类型：
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作者：
Gruber, Allison H.;Busa, Michael A.;Hamill, Joseph
以前关于青少年特发性脊柱侧凸（AIS）与健康对照组相比姿势控制变化的报道不一致。这可能表明压力中心（COP）摇摆参数不足以确定保持安静直立姿势的能力，这表明可能需要更复杂的措施来检查AIS中的姿势控制。本研究的目的是使用接触时间（TtC）、多尺度熵的复杂性指数（c）和COP摇摆参数比较不同严重程度AIS和健康对照之间的姿势控制。将36名AIS患者分为术前支具或术前，并与10名健康对照受试者进行比较。总体而言，AIS患者在内外侧方向上表现出显著更大的COP摆动，但仅通过接触时间和熵测量系统地识别了前后方向的缺陷。多尺度熵（c）结果表明，AIS患者在中外侧方向上采用了与健康对照不同的控制策略，该控制策略更具约束性，复杂性较低，适应性较低。AIS严重程度进一步降低了这种前后方向的适应性。这些结果表明，在研究AIS的姿势控制时，有必要检查两个运动平面。此外，还应考虑用于评估AIS中姿势控制变化性质的措施的应用。(C)2011爱思唯尔有限公司版权所有。
Previous reports on changes in postural control in adolescent idiopathic scoliosis (AIS) compared to healthy controls have been inconsistent. This may suggest center of pressure (COP) sway parameters are not sufficient for determining the ability to maintain quiet upright stance indicating more complex measures may be needed to examine postural control in AIS. The purpose of this investigation was to compare postural control between AIS of different severity levels and healthy controls using time-to-contact (TtC), the complexity index of multiscale entropy (c), and COP sway parameters. Thirty-six AIS patients were classified as pre-bracing or pre-operative and compared to 10 healthy control subjects. Overall, the AIS patients showed significantly greater COP sway in mediolateral direction, but deficits with respect to the anteroposterior direction were only systematically identified with the time-to-contact and entropy measures. The multiscale entropy (c) results indicate that those with AIS utilize a different control strategy from healthy controls in the mediolateral direction that is more constrained, less complex and less adaptable. AIS severity further reduced this adaptability in the anteroposterior direction. These results indicate it is necessary to examine both planes of motion when investigating postural control in AIS. Additionally, the application of the measures used to assess the nature of the postural control changes in AIS should also be considered. (C) 2011 Elsevier B.V. All rights reserved.