Department of Work and Cognitive Psychology, RWTH Aachen University, Jägerstraße 17-19, 52066, Aachen, Germany.
Exp Brain Res. 2012 Nov;223(3):353-65. doi: 10.1007/s00221-012-3264-8. Epub 2012 Sep 19.
The present study aims to address a novel aspect of visuomotor adaptation and its generalization. It is based on the assumption that the spatial structure of the distal action space is crucial for generalization. In the experiments, the distal action spaces could manifest either a symmetric or parallel structure. The imposed visuomotor rotations in the adaptation and the following generalization were either the same or opposing each other. In the generalization phase, motor bias resulting from prior adaptation was observed, and it turned out to substantially depend on the property of the workspace. In Experiment 1 with a parallel workspace, preceding adaptation to the same rotation was more advantageous than adaptation to an opposing rotation. This observation was reversed in Experiment 2 with the symmetrical workspace: prior adaptation to an opposing rotation was more advantageous for the generalization than prior adaptation to the same rotation. Mechanisms possibly underlying the observed influence of the workspace configuration were discussed.
本研究旨在探讨视动适应及其泛化的一个新方面。它基于这样一个假设，即远端动作空间的空间结构对于泛化至关重要。在实验中，远端动作空间可以表现出对称或平行的结构。在适应和随后的泛化中施加的视动旋转要么相同，要么相互对立。在泛化阶段，观察到了先前适应产生的运动偏差，结果发现它在很大程度上取决于工作空间的性质。在具有平行工作空间的实验 1 中，与相同旋转相比，先前适应于相同旋转更有利。而在具有对称工作空间的实验 2 中，观察到了相反的结果：与相同旋转相比，先前适应于相反旋转对于泛化更为有利。讨论了可能导致观察到的工作空间配置影响的机制。
