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首页> 外文期刊>The European Journal of Neuroscience >Visuomotor control of ankle joint using position vs. force
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Visuomotor control of ankle joint using position vs. force

机译：使用位置与力控制踝关节的遮挡件控制

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Ankle joint plays a critical role in daily activities involving interactions with environment using force and position control. Neuromechanical dysfunctions (e.g., due to stroke or brain injury), therefore, have a major impact on individuals' quality of life. The effective design of neuro-rehabilitation protocols for robotic rehabilitation platforms relies on understanding the control characteristics of the ankle joint in interaction with external environment using force and position, as the findings in upper limb may not be generalizable to the lower limb. This study aimed to characterize the skilled performance of ankle joint in visuomotor position and force control. A two-degree-of-freedom (DOF) robotic footplate was used to measure individuals' force and position. Healthy individuals (n = 27) used ankle force or position for point-to-point and tracking control tasks in 1-DOF and 2-DOF virtual game environments. Subjects' performance was quantified as a function of accuracy and completion time. In contrast to comparable performance in 1-DOF control tasks, the performance in 2-DOF tasks was different and had characteristic patterns in the position and force conditions, with a significantly better performance for position. Subjective questionnaires on the perceived difficulty matched the objective experimental results, suggesting that the poor performance in force control was not due to experimental set-up or fatigue but can be attributed to the different levels of challenge needed in neural control. It is inferred that in visuomotor coordination, the neuromuscular specialization of ankle provides better control over position rather than force. These findings can inform the design of neuro-rehabilitation platforms, selection of effective tasks and therapeutic protocols.
机译：踝关节在涉及使用力和位置控制的涉及与环境交互的日常活动中起着关键作用。因此，神经力学功能障碍（例如，由于中风或脑损伤）对个人的生活质量产生了重大影响。用于机器人康复平台的神经康复协议的有效设计依赖于了解使用力和位置与外部环境相互作用的踝关节的控制特性，因为上肢的发现可能不完全达到下肢。本研究旨在表征踝关节在体瓜素位置和力控制中的技术性能。使用两自由度（DOF）机器人脚踏板来测量个人的力和位置。健康的个人（n = 27）使用脚踝力或位置，用于1-DOF和2-DOF虚拟游戏环境中的点对点和跟踪控制任务。受试者的性能被量化为准确性和完成时间的函数。与1-DOF控制任务中的可比性相比，2-DOF任务中的性能不同，位置和力条件具有特征模式，具有明显更好的位置性能。关于感知难度的主观问卷符合客观实验结果，表明，在力量控制中的性能差不归因于实验性设置或疲劳，但可以归因于神经控制所需的不同挑战。推断出在游体协调中，踝关节的神经肌肉专业化可以更好地控制位置而不是力量。这些调查结果可以为神经康复平台设计，选择有效任务和治疗方案。

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