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无支撑够物动作协调性的肢体间差异。

Interlimb differences in coordination of unsupported reaching movements.

作者信息

Schaffer Jacob E, Sainburg Robert L

机构信息

The Pennsylvania State University, Department of Kinesiology, United States.

The Pennsylvania State University, Department of Kinesiology, United States; Penn State Milton S. Hershey College of Medicine, Department of Neurology, United States.

出版信息

Neuroscience. 2017 May 14;350:54-64. doi: 10.1016/j.neuroscience.2017.03.025. Epub 2017 Mar 24.

Abstract

Previous research suggests that interlimb differences in coordination associated with handedness might result from specialized control mechanisms that are subserved by different cerebral hemispheres. Based largely on the results of horizontal plane reaching studies, we have proposed that the hemisphere contralateral to the dominant arm is specialized for predictive control of limb dynamics, while the non-dominant hemisphere is specialized for controlling limb impedance. The current study explores interlimb differences in control of 3-D unsupported reaching movements. While the task was presented in the horizontal plane, participant's arms were unsupported and free to move within a range of the vertical axis, which was redundant to the task plane. Results indicated significant dominant arm advantages for both initial direction accuracy and final position accuracy. The dominant arm showed greater excursion along a redundant axis that was perpendicular to the task, and parallel to gravitational forces. In contrast, the non-dominant arm better impeded motion out of the task-plane. Nevertheless, non-dominant arm task errors varied substantially more with shoulder rotation excursion than did dominant arm task errors. These findings suggest that the dominant arm controller was able to take advantage of the redundant degrees of freedom of the task, while non-dominant task errors appeared enslaved to motion along the redundant axis. These findings are consistent with a dominant controller that is specialized for intersegmental coordination, and a non-dominant controller that is specialized for impedance control. However, the findings are inconsistent with previously documented conclusions from planar tasks, in which non-dominant control leads to greater final position accuracy.

摘要

先前的研究表明,与利手相关的肢体间协调差异可能源于不同大脑半球所支持的专门控制机制。主要基于水平面伸展研究的结果,我们提出优势手臂对侧的半球专门用于肢体动力学的预测控制,而非优势半球则专门用于控制肢体阻抗。当前的研究探讨了三维无支撑伸展运动控制中的肢体间差异。虽然任务呈现在水平面,但参与者的手臂无支撑且可在垂直轴范围内自由移动,该垂直轴与任务平面冗余。结果表明,优势手臂在初始方向准确性和最终位置准确性方面均具有显著优势。优势手臂在垂直于任务且平行于重力的冗余轴上表现出更大的移动幅度。相比之下,非优势手臂能更好地阻止偏离任务平面的运动。然而,非优势手臂的任务误差随肩部旋转移动的变化幅度明显大于优势手臂的任务误差。这些发现表明,优势手臂控制器能够利用任务的冗余自由度,而非优势手臂的任务误差似乎受限于沿冗余轴的运动。这些发现与专门用于节段间协调的优势控制器以及专门用于阻抗控制的非优势控制器相一致。然而,这些发现与先前平面任务中记录的结论不一致,在平面任务中,非优势控制会带来更高的最终位置准确性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9e3a/5489756/a240c27679f5/nihms862680f1.jpg

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本文引用的文献

1
Convergent models of handedness and brain lateralization.惯用手和大脑偏侧性的汇聚模型。
Front Psychol. 2014 Oct 8;5:1092. doi: 10.3389/fpsyg.2014.01092. eCollection 2014.
2
Handedness can be explained by a serial hybrid control scheme.利手可以用一种串行混合控制方案来解释。
Neuroscience. 2014 Oct 10;278:385-96. doi: 10.1016/j.neuroscience.2014.08.026. Epub 2014 Aug 28.
6
Sensorimotor performance asymmetries predict hand selection.感觉运动性能的不对称性预测手的选择。
Neuroscience. 2013 Jan 3;228:349-60. doi: 10.1016/j.neuroscience.2012.10.046. Epub 2012 Oct 27.
8
Motor lateralization is characterized by a serial hybrid control scheme.运动侧化的特点是采用串行混合控制方案。
Neuroscience. 2011 Nov 24;196:153-67. doi: 10.1016/j.neuroscience.2011.08.039. Epub 2011 Aug 25.
10
Unconstrained three-dimensional reaching in rhesus monkeys.恒河猴无约束的三维伸展。
Exp Brain Res. 2011 Mar;209(1):35-50. doi: 10.1007/s00221-010-2514-x. Epub 2010 Dec 19.

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