Finger inter-dependence: Linking the kinetic and kinematic variables
Finger inter-dependence: Linking the kinetic and kinematic variables
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DOI：
10.1016/j.humov.2007.08.005
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发表时间：
2008-06-01
影响因子：
2.1
通讯作者：
Latash, Mark L.
中科院分区：
文献类型：
--
作者：
Kim, Sun Wook;Shim, Jae Kun;Latash, Mark L.
我们研究了自愿运动之间的依赖性的手指和压力所产生的提示，其他手指的手。参与者移动右手的一个手指（任务手指），试图以不同的频率跟随一个周期性的、斜坡状的弯曲延伸模板。其他手指（从指）被限制移动，他们的屈曲力进行了记录和分析。食指运动引起的最小的力生产的从手指。较大的部队产生的邻居的任务手指，这些部队表现出强烈的调制范围内的运动的任务手指。与伸展阶段相比，在运动周期的屈曲阶段期间的受控力更高。奴役的指数表示N/弧度较高时，通过更弯曲的姿势移动的任务手指。奴役的范围和方向的任务手指运动的依赖性提出了问题的手指协调分析方法的基础上假设的通用矩阵的手指相互依存。(C)2007 Elsevier B. V.保留所有权利。
We studied the dependence between voluntary motion of a finger and pressing forces produced by the tips of other fingers of the hand. Participants moved one of the fingers (task finger) of the right hand trying to follow a cyclic, ramp-like flex ion-extension template at different frequencies. The other fingers (slave fingers) were restricted from moving; their flexion forces were recorded and analyzed. Index finger motion caused the smallest force production by the slave fingers. Larger forces were produced by the neighbors of the task finger; these forces showed strong modulation over the range of motion of the task finger. The enslaved forces were higher during the flexion phase of the movement cycle as compared to the extension phase. The index of enslaving expressed in N/rad was higher when the task finger moved through the more flexed postures. The dependence of enslaving on both range and direction of task finger motion poses problems for methods of analysis of finger coordination based on an assumption of universal matrices of finger interdependence. (C) 2007 Elsevier B.V. All rights reserved.