Method for evoking a trip-like response using a treadmill-based perturbation during locomotion
Method for evoking a trip-like response using a treadmill-based perturbation during locomotion
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DOI：
10.1016/j.jbiomech.2013.10.035
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发表时间：
2014-01-03
影响因子：
2.4
通讯作者：
Kaufman, Kenton
中科院分区：
文献类型：
--
作者：
Sessoms, Pinata H.;Wyatt, Marilynn;Kaufman, Kenton
由于绊倒相关的福尔斯占截肢患者和老年人福尔斯的很大比例，因此在实验室环境中反复可靠地模拟绊倒或引起类似绊倒反应的能力具有潜在的实用性，可作为评估绊倒相关跌倒风险的工具和降低跌倒风险的培训工具。本文介绍了一种基于mill-based的方法，用于在运动过程中提供姿势扰动，以引起类似旅行的反应，并作为地上旅行的替代品。受试者在计算机辅助康复环境（CAREN）中以标准化速度行走。在单肢站立期间，跑步机带速度迅速改变，从而要求受试者执行补偿性步进反应以避免跌倒。与福尔斯相关的响应相比，与恢复相关的响应在扰动后的初始代偿步骤期间的躯干屈曲角度峰值和躯干屈曲速度峰值较小。这些关键的跌倒预测变量与老年人实验室诱导旅行的结果一致。这种扰动技术还表明，这种重复但随机传递扰动的方法可以引起一致的受试者内反应。(C)2013爱思唯尔有限公司保留所有权利。
Because trip-related falls account for a significant proportion of falls by patients with amputations and older adults, the ability to repeatedly and reliably simulate a trip or evoke a trip-like response in a laboratory setting has potential utility as a tool to assess trip-related fall risk and as a training tool to reduce fall risk. This paper describes a treadmill-based method for delivering postural perturbations during locomotion to evoke a trip-like response and serve as a surrogate for an overground trip. Subjects walked at a normalized velocity in a Computer Assisted Rehabilitation Environment (CAREN). During single-limb stance, the treadmill belt speed was rapidly changed, thereby requiring the subject to perform a compensatory stepping response to avoid falling. Peak trunk flexion angle and peak trunk flexion velocity during the initial compensatory step following the perturbation were smaller for responses associated with recoveries compared to those associated with falls. These key fall prediction variables were consistent with the outcomes observed for laboratory-induced trips of older adults. This perturbation technique also demonstrated that this method of repeated but randomly delivered perturbations can evoke consistent, within-subject responses. (C) 2013 Elsevier Ltd. All rights reserved.