Proprioceptive control of multijoint movement: unimanual circle drawing.
Proprioceptive control of multijoint movement: unimanual circle drawing.
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多关节运动的本体感觉控制：单手画圆。
DOI：
10.1007/s002210050787
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发表时间：
1999
影响因子：
2
通讯作者：
Dounskaia,NV
中科院分区：
文献类型：
--
作者：
Verschueren,SM;Swinnen,SP;Cordo,PJ;Dounskaia,NV
本实验探讨了本体感觉是否被中枢神经系统（CNS）用于控制单手画圆的空间和时间特性。画圈是一种多关节运动，其中肘部和肩部的肌肉依次激活。画圆的空间和时间特征取决于这些顺序激活模式的精确协调，本体感觉非常适合支持这种协调。被蒙住眼睛的人类受试者产生了逆时针圆形绘画运动（直径= 16厘米）与优势臂在1/s的重复率。在一些试验中，60 - 70 Hz的振动被施加到肱二头肌和/或前三角肌的肌腱。从手部运动数据测量的空间参数包括手在工作空间中的x轴和y轴直径、圆度和漂移。肱二头肌或前三角肌的振动导致受试者画圆直径减小，圆度变化，手有系统的漂移。这些扭曲的肌腱振动画圆表明，中枢神经系统使用本体感受信息来完成这个运动任务的空间特征。两块肌肉同时振动产生的漂移超过了单独的振动效果，这表明中枢神经系统结合了与肘部和肩部旋转相关的本体感受信息来控制手的运动。从关节角度数据量化画圆的时间特性。虽然振动没有显着影响肘关节和肩关节旋转之间的相对相位，相位关系的变异性显着增加，这表明本体感觉有助于相位稳定。在画圈过程中，肘关节屈伸运动是在肱二头肌有限活动的情况下产生的。然而，二头肌振动扭曲了圆圈的指标，这表明肌肉作为感觉传感器的重要性与其活动水平无关。
The present experiments addressed whether proprioception is used by the central nervous system (CNS) to control the spatial and temporal characteristics of unimanual circle drawing. Circle drawing is a multijoint movement, in which the muscles crossing the elbow and the shoulder are sequentially activated. The spatial and temporal characteristics of circle drawing depend on the precise coordination of these sequential activation patterns, and proprioception is ideally suited to support this coordination. Blindfolded human subjects produced a counterclockwise circular drawing motion (diameter = 16 cm) with the dominant arm at a repetition rate of 1/s. In some trials, 60–70 Hz vibration was applied to the tendons of the biceps brachii and/or the anterior deltoid. Spatial parameters measured from hand-movement data included the x- and y-axis diameters, circularity, and drift of the hand in the workspace. Vibration of either the biceps brachii or the anterior deltoid caused subjects to draw circles with decreased diameter, with changes in circularity, and with a systematic drift of the hand. These distortions to circle drawing by tendon vibration demonstrate that the CNS uses proprioceptive information to accomplish the spatial characteristics of this motor task. Simultaneous vibration of both muscles produced a drift that exceeded the individual vibration effects, which suggests that the CNS combined proprioceptive information related to elbow and shoulder rotation to control the movement of the hand. The temporal characteristics of circle drawing were quantified from joint angle data. While vibration did not significantly influence the relative phase between elbow and shoulder rotation, the variability of the phase relationship increased significantly, which suggests that proprioception contributes to phase stabilization. During circle drawing, elbow flexion-extension movements were produced with limited activation of the biceps. Nevertheless, biceps vibration distorted the circle metrics, suggesting that a muscle’s significance as a sensory transducer is independent of its activity level.