Greater reliance on impedance control in the nondominant arm compared with the dominant arm when adapting to a novel dynamic environment
Greater reliance on impedance control in the nondominant arm compared with the dominant arm when adapting to a novel dynamic environment
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DOI：
10.1007/s00221-007-1017-x
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发表时间：
2007-10-01
影响因子：
2
通讯作者：
Lum, Peter S.
中科院分区：
文献类型：
--
作者：
Schabowsky, Christopher N.;Hidler, Joseph M.;Lum, Peter S.
这项研究调查了 16 名天真的右利手、神经系统完好的受试者的优势臂和非优势臂之间对新动态环境的适应差异。受试者握住机器人操作器的手柄，并按照伪随机目标序列在水平面内执行到达动作。机器人电机施加卷曲场扰动，我们比较了主导臂和非主导臂之间的适应速度和质量。在适应时间过程的早期阶段，双臂之间的运动适应率相似，但非优势臂的平均峰值和图形误差明显小于优势臂。此外，非优势肢体的后遗症明显小于优势手臂。因此，在适应新的动态环境时，非优势肢体的控制器似乎比优势肢体更大程度地依赖阻抗控制。这项研究的结果表明，个体的两条手臂之间的动态适应存在差异。
This study investigated differences in adaptation to a novel dynamic environment between the dominant and nondominant arms in 16 naive, right-handed, neurologically intact subjects. Subjects held onto the handle of a robotic manipulandum and executed reaching movements within a horizontal plane following a pseudo-random sequence of targets. Curl field perturbations were imposed by the robot motors, and we compared the rate and quality of adaptation between dominant and nondominant arms. During the early phase of the adaptation time course, the rate of motor adaptation between both arms was similar, but the mean peak and figural error of the nondominant arm were significantly smaller than those of the dominant arm. Also, the nondominant limb's aftereffects were significantly smaller than in the dominant arm. Thus, the controller of the nondominant limb appears to have relied on impedance control to a greater degree than the dominant limb when adapting to a novel dynamic environment. The results of this study imply that there are differences in dynamic adaptation between an individual's two arms.