Abstract

Goal-directed reaches are modified based on previous errors experienced (i.e., offline control) and current errors experienced during movement execution (i.e., online control). It is well documented that the control processes (i.e., offline and online control) underlying well learned movements change based on the time available to complete an action, such that offline control processes are engaged to a greater extent when movements are completed in a faster movement time (MT). Here, we asked if the underlying movement control processes governing newly acquired movements also change under varying MT constraints. Sixteen participants adapted their movements to a visuomotor distortion. Following reach training trials, participants reached under Long (800–1000 ms) and Short (400–500 ms) MT constraints. Results indicate that movement errors when reaching with the rotated cursor were reduced online under the Long MT constraint compared to the Short MT constraint. Thus, the contributions of offline and online movement control processes engaged in newly acquired movements can be adjusted with changes in temporal demands.

摘要

基于先前经历的错误（即离线控制）和运动执行期间经历的当前错误（即在线控制）修改目标导向的范围。有据可查的是，基于良好学习动作的控制过程（即离线和在线控制）根据完成动作的可用时间而变化，因此当动作以更快的速度完成时，离线控制过程会在更大程度上参与时间（吨）。在这里，我们询问控制新获得的运动的基础运动控制过程是否也会在不同的 MT 约束下发生变化。16 名参与者使他们的动作适应视觉运动扭曲。在达到训练试验之后，参与者在长 (800-1000 毫秒) 和短 (400-500 毫秒) MT 约束下达到。结果表明，与短 MT 约束相比，在 Long MT 约束下，使用旋转光标到达时的移动错误在线减少。因此，可以根据时间需求的变化来调整参与新获得的运动的离线和在线运动控制过程的贡献。