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首页> 外文期刊>Journal of Biomechanics >Effect of sensory-motor latencies and active muscular stiffness on stability for an ankle-hip model of balance on a balance board
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Effect of sensory-motor latencies and active muscular stiffness on stability for an ankle-hip model of balance on a balance board

机译：感觉 - 电动机延迟的影响以及主动肌肉刚度对平衡板踝关节髋关节模型的稳定性

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To achieve human upright posture (UP) and avoid falls, the central nervous system processes visual, vestibular, and proprioceptive information to activate the appropriate muscles to accelerate or decelerate the body's center of mass. In this process, sensory-motor (SM) latencies and muscular deficits, even in healthy older adults, may cause falls. This condition is worse for people with chronic neuromuscular deficits (stroke survivors, patients with multiple sclerosis or Parkinson's disease). One therapeutic approach is to recover or improve quiet UP by utilizing a balance board (BB) (a rotating surface with a tunable stiffness and time delay), where a patient attempts to maintain UP while task difficulty is manipulated. While BBs are commonly used, it is unclear how UP is maintained or how changes in system parameters such as SM latencies and BB time delay affect UP stability. To understand these questions, it is important that mathematical models be developed with enough degrees-of-freedom to capture the many responses evoked during the maintenance of UP on a BB. This paper presents an ankle-hip model of balance on a BB, which is used to study the combined effect of SM latencies and active muscular stiffness of the ankle and hip joints, and the BB stiffness and time delay on UP stability. The analysis predicts that people with proprioceptive, visual, vestibular loss, or increased SM latencies may show either leaning postures or larger body-sway. The results show that the BB time delay and the visual and vestibular feedback have the largest impact on UP stability. (C) 2018 Elsevier Ltd. All rights reserved.
机译：为了实现人类直立姿势（向上）并避免跌落，中枢神经系统流程视觉，前庭和原企业信息，以激活适当的肌肉，以加速或减速身体的心脏中心。在这个过程中，感觉 - 电机（SM）延迟和肌肉缺陷，即使在健康的老年人中也可能导致跌倒。对于慢性神经肌肉缺陷（中风幸存者，患有多发性硬化症或帕金森病的患者）的人来说，这种情况更糟。一种治疗方法是通过利用平衡板（BB）（具有可调谐刚度和时间延迟）的平衡板（旋转表面）来恢复或改善安静，其中患者在操纵任务难度时试图保持上升。虽然常用BBS，但目前尚不清楚如何维持UP或系统参数的变化，例如SM延迟和BB时间延迟影响稳定性。要了解这些问题，重要的是，数学模型具有足够的自由度来捕获在BB上维护期间诱捕的许多响应。本文介绍了BB上的踝关节平衡模型，用于研究踝关节和髋关节的SM延迟和主动肌肉刚度的组合效果，以及BB刚度和时间延迟稳定性。该分析预测，具有预先存在，视觉，前庭损失或增加SM延迟的人们可以显示倾斜姿势或更大的身体摇摆。结果表明，BB时间延迟和视觉和前庭反馈对稳定性的影响最大。 （c）2018年elestvier有限公司保留所有权利。

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