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首页> 外文会议>2014 IEEE Conference on Biomedical Engineering and Sciences >Balance process during repeated surface perturbation: Adaptation response of joint stiffness and muscle activation
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Balance process during repeated surface perturbation: Adaptation response of joint stiffness and muscle activation

机译：反复的表面扰动过程中的平衡过程：关节僵硬和肌肉激活的适应性反应

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It is believed that humans are keen to learn and initiate more efficient and less energy consumption strategies, especially when they desire repetitive work or motion. However, in human's balancing process, the ability to adapt a repeated surface movement and its response towards imbalance, due to less sensory input, is still unclear. In this study, adaptation behaviours of joint stiffness pattern and muscle activation were observed during limited sensory inputs. Seven young subjects participated in this study. Two different surface perturbations (tilt up-tilt (TT) down and translation (T)) at four different sensory manipulation conditions (include vision and vestibular system) were introduced to the subject. Then, they were asked to maintain their position as long as possible. The results have shown that amplitude of joint stiffness decreased by almost 1.2 percent at the ankle over 10 cycles. However, there is almost no adaptation at the hip. Even though average the adaptation percentage increased as sensory inputs became better (r>0.3), no significant difference between sensory conditions was recorded (p>0.05). Meanwhile, different adaptation patterns were observed among five different muscles at both types of perturbation, with adaptation at almost 1 percent on average. The findings have shown that adaptation behaviour is able to describe motor learning functions of the balancing process in humans. It helps to enhance human posture control model and muscle dynamic model especially related to continuous repeated motion or force applied to the system.
机译：人们相信，人们热衷于学习和发起更有效，能耗更低的策略，尤其是当他们需要重复的工作或运动时。然而，在人类的平衡过程中，由于较少的感官输入，适应反复的表面运动及其对不平衡的反应的能力仍不清楚。在这项研究中，在有限的感觉输入过程中观察到关节僵硬模式和肌肉激活的适应行为。七个年轻的受试者参加了这项研究。向受试者介绍了在四种不同的感官操作条件（包括视觉和前庭系统）下的两种不同的表面扰动（上下倾斜（TT）向下和平移（T））。然后，他们被要求保持尽可能长的位置。结果表明，在10个周期内，踝关节的关节僵硬幅度下降了近1.2％。但是，髋关节几乎没有适应性。即使平均适应百分比随着感觉输入的改善而增加（r> 0.3），但在感觉状态之间未发现明显差异（p> 0.05）。同时，在两种类型的扰动下，五种不同的肌肉之间观察到不同的适应模式，平均适应率几乎为1％。研究结果表明，适应行为能够描述人类平衡过程中的运动学习功能。它有助于增强人体姿势控制模型和肌肉动力学模型，尤其是与连续重复运动或施加到系统的力有关的模型。

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