LATERAL STABILITY DURING INDUCED STEPPING IN THE ELDERLY

描述：(改编自调查者摘要)这项计划的长期目标 研究是为了了解运动控制过程中潜在的保护 为老年人的人体平衡恢复迈出一步。老龄化似乎呈现出 控制横向稳定性的具体问题。能力受损 产生快速和受控的内收-外展肌力和姿势 运动可能使许多老年人容易发生侧向不稳定和跌倒。 本项目侧重于如何在以下条件下生成维持平衡的步骤 不同方向的扰动平衡。具体地说，它将比较 年轻人和积极健康的社区居住老年人的方式 根据不同的姿势方向控制他们的身体动作 骚乱。作者提出，额叶的年龄差异 平面保护性步进模式将表明站姿的侧向不稳定， 而这些差异将预示着下跌的风险。这 横向不稳定可能与生产能力降低有关。 有效的髋关节外展-内收肌力矩-时间响应控制额部 平面身体运动和踏步。这可能反映在神经肌肉受损上。 肌肉收缩的激活过程和/或内在变化 机械装置。确定关键的马达控制过程基础保护 作为年龄和未来跌倒风险的函数的踩踏行为将得到改善 我们对致残的发病机制的认识。

DESCRIPTION: (adapted from Investigator's abstract) The long-term goal of this study is to understand the motor control processes underlying protective stepping for human balance recovery in older persons. Aging appears to present specific problems in controlling lateral stability. Impaired ability to generate rapid and controlled adductor-abductor muscular forces and postural movements may predispose many older persons to lateral instability and falls. This project focuses on the ways steps are generated to maintain balance under different directions of perturbed balance. Specifically, it will compare the ways younger individuals and active healthy community dwelling older persons control their body movements in response to different directions of postural disturbances. The authors propose that age-associated differences in frontal plane protective stepping patterns will indicate lateral instability in stance, and that these differences will be predictive of the risk of falling. This lateral instability may be associated with a reduced capacity to produce effective hip joint abductor-adductor torque-time responses to control frontal plane body motion and stepping. This may be reflected in impaired neuromuscular activation processes and/or in intrinsic changes in muscle contraction mechanisms. Identifying key motor control processes underlying protective stepping behavior as a function of age and future risk of falls will improve our understanding of the pathogenesis of disablement.