Dynamic proprioceptive target matching behavior in the upper limb: Effects of speed, task difficulty and arm/hemisphere asymmetries
Dynamic proprioceptive target matching behavior in the upper limb: Effects of speed, task difficulty and arm/hemisphere asymmetries
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DOI：
10.1016/j.bbr.2008.11.034
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发表时间：
2009-06-08
影响因子：
2.7
通讯作者：
Brown, Susan H.
中科院分区：
文献类型：
--
作者：
Goble, Daniel J.;Brown, Susan H.
虽然本体感觉由静态(即位置)和动态(即运动)两部分组成，但大多数关于本体感觉靶点匹配的研究仅集中在位置上。此外，这些位置匹配研究最近表明，本体感觉能力受到几个因素的影响，包括任务难度和手臂偏好。因此，本研究的目的是量化不同匹配条件下动态本体感觉靶手臂动作的匹配情况。使用力矩电机驱动的机械手，11名蒙眼的右撇子成年人在两种不同的峰值速度(30度/S或60度/S)下经历了三角形速度曲线，首选和非首选肘部。然后，受试者将这些目标运动的动态与相同(同侧记住)或相反(对侧记住)的肘部相匹配。对于难度更大的对侧记忆任务，与同侧记忆任务相比，配对错误通常更大，并且目标速度条件更高。结果发现，在同侧记忆条件下，在匹配平均目标加速度时，一个臂的差异表明非优先臂优势。总体而言，这些结果表明，动态本体感觉反馈匹配绩效受到多个因素的影响，包括峰值速度、任务难度和肢体偏好。(C)2008爱思唯尔B.V.保留所有权利。
Although proprioception consists of static (i.e. position) and dynamic (i.e. movement) components, most studies regarding the matching of proprioceptive targets have focused only on position. Further, these position-matching studies have recently indicated that proprioceptive ability is influenced by several factors including task difficulty and arm preference. The purpose of the present study, therefore, was to quantify the matching of dynamic proprioceptive target arm movements under different matching conditions. Using torque motor-driven manipulanda, 11 blindfolded, right-handed adults experienced triangular velocity profiles at 2 different peak speeds (30 degrees/s or 60 degrees/s) with the preferred and non-preferred elbow. Subjects then matched the dynamics of these target movements with either the same (ipsilateral remembered) or opposite (contralateral remembered) elbow. Matching errors were generally larger for the more difficult, contralateral remembered versus ipsilateral remembered task, and for greater target speed conditions. One arm difference was found indicating a non-preferred arm advantage for the matching of average target acceleration in the ipsilateral remembered condition. Overall, these results demonstrate that dynamic proprioceptive feedback-matching performance is influenced by several factors including peak speed, task difficulty and limb preference. (C) 2008 Elsevier B.V. All rights reserved.