The influence of the dynamic transformation of a sliding lever on aiming errors

The influence of the dynamic transformation of a sliding lever on aiming errors
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滑动杆动态变换对瞄准误差的影响

DOI:
10.1016/j.neuroscience.2012.01.035
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发表时间:
--
期刊:
影响因子:
3.3
通讯作者:
Sülzenbrück
Sülzenbrück
中科院分区:
医学3区
文献类型:
--
作者:
Sülzenbrück

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人体运动会根据惯性负载的变化进行快速调整。然而,这种调整并不总是意味着完全补偿,因此运动学运动特性会发生变化。本实验旨在探讨一个复杂的动态转换,实现了一个滑动的一阶杠杆,对目标导向运动的端点分布的后果。而端点分布明显受到手臂的惯性各向异性的影响,杠杆的动态变换没有影响,既不对端点分布的参数,也不对连续运动的端点的协变(误差传播)。然而,当杠杆被使用时,手臂的惯性各向异性对运动幅度的影响被降低,伴随着整体较长的运动时间,特别是对于具有较高惯性负载的手臂的运动。这些观察结果表明,在存在可变惯性负载的情况下,使用内部模型和阻抗控制的相互作用。最有可能的是,滑动杆的动态变换的影响被增加的接头阻抗吸收,这也减小了臂的惯性各向异性的影响,否则该臂的惯性各向异性基于臂的动态变换的内部模型(不完全)被补偿。
Human movements are quickly adjusted to variations of inertial load. However, this adjustment does not always imply a full compensation, so that kinematic movement characteristics vary. The present experiment served to explore the consequences of a complex dynamic transformation, implemented by a sliding first-order lever, on the endpoint distributions of goal-directed movements. Whereas the endpoint distributions were clearly affected by the inertial anisotropy of the arm, there was no effect of the dynamic transformation of the lever, neither on the parameters of endpoint distributions nor on the covariations of endpoints of successive movements (error propagation). However, when the lever was used, the effect of the inertial anisotropy of the arm on movement amplitudes was reduced, accompanied by a longer movement time overall, in particular for movements with higher inertial load of the arm. These observations suggest an interaction of the use of internal models and impedance control in the presence of variable inertial loads. Most likely the influence of the dynamic transformation of the sliding lever is absorbed by increased joint impedance, which also reduces the influence of the inertial anisotropy of the arm which otherwise is (incompletely) compensated based on an internal model of the dynamic transformation of the arm.
不同速度的画圆运动:惯性各向异性的作用。
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发表时间: 2002
期刊: Journal of neurophysiology.
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