Effects of Arm Stiffness and Muscle Effort on Position Reproduction Error in the Horizontal Plane
Effects of Arm Stiffness and Muscle Effort on Position Reproduction Error in the Horizontal Plane
复制标题
手臂刚度和肌肉力量对水平面位置再现误差的影响
DOI：
10.2466/25.26.pms.114.3.757-773
复制
发表时间：
2012
影响因子：
1.6
通讯作者：
Kazuyoshi Fukuzawa
中科院分区：
文献类型：
--
作者：
Yoshihiro Itaguchi;Kazuyoshi Fukuzawa
本研究调查了二维手臂僵硬和维持水平手臂姿势所需的肌肉力量对位置再现误差的影响。12名受试者在没有视觉反馈的情况下完成了一项多关节位置再现任务。他们被要求用同侧手臂的指尖指示正确感觉记忆的目标位置。结果表明，在刚度椭圆的低刚度方向上，恒定误差和可变误差都大于高刚度方向。在位置感知过程中手臂被支撑的情况下，变量误差大于垂直不支撑时的变量误差。这些结果表明，本体感觉的精确度和精确度与椭圆表示的手臂僵硬的轴长呈正相关，施加肌肉力量以维持手臂免受重力的作用可能支持人类的本体感觉机制。
The present study investigated the effects of two-dimensional arm stiffness and muscle effort required to maintain horizontal arm posture on position-reproduction errors. 12 participants performed a multi-joint position-reproduction task without visual feedback. They were required to indicate a proprioceptively remembered target position with the fingertip of the ipsilateral arm. The results showed that both constant and variable errors were larger in the direction of lower stiffness rather than in the direction of higher stiffness in the stiffness ellipse. In the condition where participants' arm was supported during position perception, variable error was larger than when it was vertically unsupported. These results suggested that proprioceptive accuracy and precision are positively related to the axis length of elliptically represented arm stiffness, and that exerting muscle effort to maintain the arm against the force of gravity may be supportive of human proprioceptive mechanisms.