Anticipating load torques produced by voluntary movements.
Anticipating load torques produced by voluntary movements.
复制标题
预测随意运动产生的负载扭矩。
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
S. Lederman
中科院分区：
文献类型：
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作者：
A. Wing;S. Lederman
手指和拇指之间握持的物体的稳定性取决于垂直于接触面的握力所产生的摩擦力，以克服切向负载力。以往的研究表明，在举起物体时，随着手的重量，握力随着重力载荷的增加而增加；在移动物体时，握力会被调整以满足运动诱导的惯性负载力。这些结果证明了握力与负载力协调的预期性。本研究探讨握力是否能预测负载力矩。当参与者被限制使用抓取轴明显远离物体质心的抓取点时，研究发现，他们在预期负载扭矩的情况下进行握力调整，这些扭矩往往会因为举起或移动物体而使其不稳定。这些调整意味着在运动规划中使用关于对象重心的信息。
The stability of an object held between the finger and thumb depends on friction developed by grip force, normal to the contact surfaces, to overcome tangential load force. Previous research has shown that in lifting an object, grip force rises with the increase in gravitational load force as the hand takes the weight and that in moving an object, grip force is adjusted to meet movement-induced inertial load force. Those results demonstrated the anticipatory nature of coordination of grip force with load force. Whether grip force anticipates load torque was studied in this research. When participants were constrained to use grasp points where the grasp axis was manifestly distant from object center of mass, it was found that they made grip force adjustments in anticipation of load torques that tended to destabilize an object as a result of lifting or moving it. These adjustments imply use of information about object center of mass in movement planning.