Kinematic and behavioral analyses of protective stepping strategies and risk for falls among community living older adults.
Kinematic and behavioral analyses of protective stepping strategies and risk for falls among community living older adults.
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保护策略的运动学和行为分析以及生活老年人社区中跌倒风险的风险。
DOI：
10.1016/j.clinbiomech.2016.04.015
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发表时间：
2016-07
期刊：
影响因子：
--
通讯作者：
Rogers MW
中科院分区：
文献类型：
--
作者：
Bair WN;Prettyman MG;Beamer BA;Rogers MW
由外部施加的侧向扰动引起的保护性踏步揭示了福尔斯的平衡缺陷。然而，缺乏关于与扰动的幅度有关的不同步进策略的控制的全面信息限制了对与年龄和跌倒状态有关的平衡控制的理解。本研究的目的是探讨不同的保护性步策略和他们的运动学和行为控制特性，以应对不同幅度的横向腰部拉老年人之间的秋天和非秋天。52个社区居住的老年人（16名跌倒者）自然反应，以保持平衡，以应对五个级别的横向腰部拉。平衡公差限制（BTL，腰拉幅度保护步骤从单一过渡到多个步骤），第一步控制特性（步进频率和计数，时空运动学，和躯干位置在着陆）的四个自然选择的保护步骤类型之间的秋天和非秋天在和以上BTL进行了比较。跌倒者最常采取中间步，而非跌倒者最常采取交叉后步。只有非fallers改变他们的步数和第一步控制参数的步骤类型的瞬间步骤开始（起始时间）和终止（躯干位置），而两组调制步骤执行参数（单站持续时间和步长）的步骤类型。组间差异通常在高于BTL时表现得更好。跌倒者主要使用生物力学上不太有效的中间步进策略，这可能部分由身体感觉减少来解释。跌倒者在第一步开始和结束时没有通过步骤类型来调节他们的步骤参数，这种情况特别容易受到不稳定性的影响，这反映了他们在保护性踏步过程中平衡控制的局限性。
Protective stepping evoked by externally applied lateral perturbations reveals balance deficits underlying falls. However, a lack of comprehensive information about the control of different stepping strategies in relation to the magnitude of perturbation limits understanding of balance control in relation to age and fall status. The aim of this study was to investigate different protective stepping strategies and their kinematic and behavioral control characteristics in response to different magnitudes of lateral waist-pulls between older fallers and non-fallers. Fifty-two community-dwelling older adults (16 fallers) reacted naturally to maintain balance in response to five magnitudes of lateral waist-pulls. The balance tolerance limit (BTL, waist-pull magnitude where protective steps transitioned from single to multiple steps), first step control characteristics (stepping frequency and counts, spatial–temporal kinematic, and trunk position at landing) of four naturally selected protective step types were compared between fallers and non-fallers at- and above-BTL. Fallers took medial-steps most frequently while non-fallers most often took crossover-back-steps. Only non-fallers varied their step count and first step control parameters by step type at the instants of step initiation (onset time) and termination (trunk position), while both groups modulated step execution parameters (single stance duration and step length) by step type. Group differences were generally better demonstrated above-BTL. Fallers primarily used a biomechanically less effective medial-stepping strategy that may be partially explained by reduced somato-sensation. Fallers did not modulate their step parameters by step type at first step initiation and termination, instances particularly vulnerable to instability, reflecting their limitations in balance control during protective stepping.
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DOI：
10.1093/gerona/gls149
发表时间：
2012-11-01
影响因子：
5.1
作者：
Carty, Christopher P.;Barrett, Rod S.;Mills, Peter M.
通讯作者：
Mills, Peter M.
影响因子：
2.4
作者：
Maki, BE;McIlroy, WE;Perry, SD
通讯作者：
Perry, SD
影响因子：
2
作者：
Meyer, PF;Oddsson, LIE;De Luca, CJ
通讯作者：
De Luca, CJ
DOI：
10.1016/j.apmr.2008.01.023
发表时间：
2008-09-01
影响因子：
4.3
作者：
Hilliard, Marjorie Johnson;Martinez, Katherine M.;Rogers, Mark W.
通讯作者：
Rogers, Mark W.
影响因子：
2.4
作者：
Pidcoe, PE;Rogers, MW
通讯作者：
Rogers, MW