Pigeon P, Feldman A G
Institut de Génie Biomédical, Ecole Polytechnique de Montréal, Québec, Canada.
Brain Res. 1998 Aug 17;802(1-2):274-80. doi: 10.1016/s0006-8993(98)00616-7.
This study examined the influence of trunk recruitment on the kinematic characteristics of pointing movements. The distribution of final positions of the hand, the extent and direction of the hand trajectory was basically preserved when trunk movement was combined with arm pointing. These effects were observed during pointing not only with but also without vision. The results imply that two functionally independent units of coordination are used in pointing regardless of visual feedback-one producing arm movement to the target (the reaching synergy) and the other coordinating trunk and arm movements diminishing the influence of the trunk on the arm endpoint trajectory (the compensatory synergy).
本研究考察了躯干参与对指向运动运动学特征的影响。当躯干运动与手臂指向相结合时，手的最终位置分布、手轨迹的范围和方向基本保持不变。这些效应在有视觉和无视觉的指向过程中均被观察到。结果表明，无论有无视觉反馈，在指向过程中都使用了两个功能上独立的协调单元——一个产生手臂向目标的运动（伸手协同），另一个协调躯干和手臂运动以减少躯干对手臂端点轨迹的影响（补偿协同）。
