Movement paths in operating hand-held tools: tests of distal-shift hypotheses.
Movement paths in operating hand-held tools: tests of distal-shift hypotheses.
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操作手持工具的运动路径：远端移位假设的检验
DOI：
10.1152/jn.01101.2012
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发表时间：
2013
影响因子：
2.5
通讯作者：
Sülzenbrück
中科院分区：
文献类型：
--
作者：
Sülzenbrück
用工具伸展身体可能意味着手部运动的特征成为工具有效部分运动的特征。最近的研究表明，这种远端位移受到边界条件的影响。在这里，我们提出了三个约束的存在：策略约束，运动特性的约束，和控制模式的约束。我们调查他们的有效性的曲率的横向运动的目标，同时使用一个滑动的一阶杠杆。参与者移动真实的或虚拟杠杆的力臂的尖端，以控制显示器上代表杠杆的负载臂的尖端的移动的光标。利用该工具，直线横向手部运动与工具尖端的路径的凹曲率相关联。与终端视觉反馈和目标时，提出了手，手的路径是轻微的凹在没有动态变换的工具和轻微的凸在其存在。当目标呈现为杠杆的尖端时，手路径的凹曲率和凸曲率都变得更强。最后，随着杠杆尖端的连续视觉反馈，手部路径的曲率变成凸形，并且杠杆尖端的路径的凹曲率减小。此外，动力学变换对曲率的影响被衰减。这些研究结果支持的概念，远端移位受到至少三个建议的限制。
Extending the body with a tool could imply that characteristics of hand movements become characteristics of the movement of the effective part of the tool. Recent research suggests that such distal shifts are subject to boundary conditions. Here we propose the existence of three constraints: a strategy constraint, a constraint of movement characteristics, and a constraint of mode of control. We investigate their validity for the curvature of transverse movements aimed at a target while using a sliding first-order lever. Participants moved the tip of the effort arm of a real or virtual lever to control a cursor representing movements of the tip of the load arm of the lever on a monitor. With this tool, straight transverse hand movements are associated with concave curvature of the path of the tip of the tool. With terminal visual feedback and when targets were presented for the hand, hand paths were slightly concave in the absence of the dynamic transformation of the tool and slightly convex in its presence. When targets were presented for the tip of the lever, both the concave and convex curvatures of the hand paths became stronger. Finally, with continuous visual feedback of the tip of the lever, curvature of hand paths became convex and concave curvature of the paths of the tip of the lever was reduced. In addition, the effect of the dynamic transformation on curvature was attenuated. These findings support the notion that distal shifts are subject to at least the three proposed constraints.
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影响因子：
3.4
作者：
Collins, Therese;Schicke, Tobias;Roder, Brigitte
通讯作者：
Roder, Brigitte
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
3.3
作者：
Sülzenbrück
通讯作者：
Sülzenbrück