Evaluation of an inertial sensor system for analysis of timed-up-and-go under dual-task demands
Evaluation of an inertial sensor system for analysis of timed-up-and-go under dual-task demands
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DOI：
10.1016/j.gaitpost.2015.03.009
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发表时间：
2015-05-01
期刊：
影响因子：
2.4
通讯作者：
Lanovaz, Joel L.
中科院分区：
文献类型：
--
作者：
Coulthard, Jason T.;Treen, Tanner T.;Lanovaz, Joel L.
功能测试，如定时起身（TUG），通常用于筛查移动性问题和跌倒风险。虽然TUG易于管理和评估，但其单一的完成时间结果可能无法区分不同的流动挑战。可穿戴传感器提供了在临床测试期间收集各种附加变量的机会。本研究的目的是评估一种新的可穿戴惯性传感器系统（iTUG），通过调查的影响，认知任务的双任务范式的时空和运动学变量在TUG。没有以前的研究都着眼于时空变量和运动学在双任务TUG测试。20名健康的年轻参与者（10名男性）进行了总共15次TUG试验，有两种不同的认知任务和正常对照条件。总时间，沿着与时空步态参数和运动学的所有TUG子任务（坐到站，步行，转身，转身坐），使用惯性传感器进行测量。iTUG的完成时间与同时手动计时高度相关。时空变量在步行过程中显示控制和认知的双重任务之间的预期差异，而躯干运动学似乎表现出更敏感的双重任务比以前报道的直线行走。非步行拖船子任务显示只有轻微的变化，在双任务条件下，表明可能的注意力转移远离认知任务。步幅和一些变异性措施显着不同的两个认知任务之间的能力区分任务。总体而言，iTUG系统的使用允许使用易于在临床环境中使用的方案收集传统变量和可能更具区分性的变量。(C)2015爱思唯尔B.V.保留所有权利。
Functional tests, such as the timed-up-and-go (TUG), are routinely used to screen for mobility issues and fall risk. While the TUG is easy to administer and evaluate, its single time-to-completion outcome may not discriminate between different mobility challenges. Wearable sensors provide an opportunity to collect a variety of additional variables during clinical tests. The purpose of this study was to assess a new wearable inertial sensor system (iTUG) by investigating the effects of cognitive tasks in a dual-task paradigm on spatiotemporal and kinematic variables during the TUG. No previous studies have looked at both spatiotemporal variables and kinematics during dual-task TUG tests. 20 healthy young participants (10 males) performed a total 15 TUG trials with two different cognitive tasks and a normal control condition. Total time, along with spatiotemporal gait parameters and kinematics for all TUG subtasks (sit-to-stand, walking, turn, turn-to-sit), were measured using the inertial sensors. Time-to-completion from iTUG was highly correlated with concurrent manual timing. Spatiotemporal variables during walking showed expected differences between control and cognitive dual-tasks while trunk kinematics appeared to show more sensitivity to dual-tasks than reported previously in straight line walking. Non-walking TUG subtasks showed only minor changes during dual-task conditions indicating a possible attentional shift away from the cognitive task. Stride length and some variability measures were significantly different between the two cognitive tasks suggesting an ability to discriminate between tasks. Overall, the use of the iTUG system allows the collection of both traditional and potentially more discriminatory variables with a protocol that is easily used in a clinical setting. (C) 2015 Elsevier B.V. All rights reserved.