Dynamic gait stability index based on plantar pressures and fuzzy logic
Dynamic gait stability index based on plantar pressures and fuzzy logic
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DOI：
10.1016/j.jbiomech.2008.02.009
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发表时间：
2008-01-01
影响因子：
2.4
通讯作者：
Kofman, Jonathan
中科院分区：
文献类型：
--
作者：
Biswas, Ajoy;Lemaire, Edward D.;Kofman, Jonathan
运动过程中的稳定性或动态稳定性对于确保安全运动和高质量的生活至关重要。动态稳定性测量应易于在临床环境中应用，并且必须提供可用于在一系列任务和环境中进行比较的定量指标。由鞋内底传感器获取的足底压力数据有可能提供这样的测量。为了生成定量动态步态稳定性指数，从商业足底压力测量系统（F-Scan）提取六个步态参数：前后（A/P）力中心（CoF）运动、内侧-外侧（M/L）CoF运动、最大外侧位置、细胞触发、步幅时间（ST）和双支撑时间（DST）。模糊逻辑控制器结合这六个参数，并产生的指数。为了验证稳定性指数，15名健康受试者进行了四项旨在诱导增加不稳定性水平的任务。57步态参数组合进行了评估，以确定最有效的指数。A/P运动、M/L运动、最大侧向位置和细胞触发参数的组合是所有受试者中最一致的有效指标。然而，健全受试者的ST和DST的微小变化可能会降低这些指标在指数计算中的有效性。结合所有六个参数的指数应进一步调查残疾或病理步态的人群。(c)2008爱思唯尔有限公司保留所有权利。
Stability during locomotion, or dynamic stability, is critical to ensure safe locomotion and a high quality of life. A dynamic stability measure should be easily applied in a clinical setting and must provide a quantitative index that can be used for comparisons over a range of tasks and environments. Plantar foot pressure data acquired by shoe-insole sensors have potential to provide such a measure. To generate a quantitative dynamic gait stability index, six gait parameters were extracted from a commercial plantar pressure measurement system (F-Scan): anterior-posterior (A/P) center of force (CoF) motion, medial-lateral (M/L) CoF motion, maximum lateral position, cell triggering, stride time (ST), and double support time (DST). A fuzzy logic controller combined these six parameters and generated the index. To validate the stability index, 15 healthy subjects performed four tasks intended to induce increasing levels of instability. Fifty-seven gait parameter combinations were assessed to determine the most effective index. A combination of A/P motion, M/L motion, maximum lateral position, and cell triggering parameters was the most consistently effective index across all subjects. However, small changes in ST and DST for able-bodied subjects may have reduced the effectiveness of these measures in the index calculation. The index combining all six parameters should be investigated further with populations with disabilities or pathological gait. (c) 2008 Elsevier Ltd. All rights reserved.