Brière Julien, Proteau Luc
a Département de kinésiologie , Université de Montréal , Montréal , Canada.
Q J Exp Psychol (Hove). 2017 Apr;70(4):736-749. doi: 10.1080/17470218.2016.1156716. Epub 2016 Mar 16.
Goal-directed movements are subject to intrinsic planning and execution variability, which requires that the central nervous system closely monitor our movements to ensure endpoint accuracy. In the present study, we sought to determine how closely the visual system monitored goal-directed aiming movements. We used a cursor-jump paradigm in which a cursor was unexpectedly translated soon after movement initiation. Some of the trials included a second cursor jump, and the cursor remained visible for different durations. The results indicate that seeing the cursor for only 16 ms after the second cursor jump was sufficient to influence the movement endpoint, which suggests that the visual system continuously monitored goal-directed movements. The results also suggest that the perceived position/trajectory of the effector was likely to have been averaged over a period of approximately 70 ms.
目标导向运动存在内在的计划和执行变异性,这要求中枢神经系统密切监测我们的运动,以确保终点准确性。在本研究中,我们试图确定视觉系统对目标导向的瞄准运动监测的密切程度。我们使用了一种光标跳跃范式,即在运动开始后不久,光标会意外移动。部分试验包括第二次光标跳跃,且光标保持可见的持续时间不同。结果表明,在第二次光标跳跃后仅看到光标16毫秒就足以影响运动终点,这表明视觉系统持续监测目标导向运动。结果还表明,效应器的感知位置/轨迹可能在大约70毫秒的时间段内进行了平均。