Gielen C C, van den Heuvel P J, van Gisbergen J A
Exp Brain Res. 1984;56(1):154-61. doi: 10.1007/BF00237452.
Eye and arm movements to single and double-step target displacements were studied to investigate whether or not the motor systems of the eye and arm share common command signals from the internal representation, which specify a) when a movement is initiated and b) the end position of a movement. The correlation between the time of onset of eye and arm movements was significant for single-step and double-step target displacements into the same direction. However, it was small and not significant for double-step target displacements into opposite directions if the time interval between first and second target displacement was 75 or 100 ms. This indicates that the command signal which specifies when a movement is started is different for both systems. However, the reconstructed signal in the internal representation, which specifies the end position of movements, is rather similar for eye and arm movements which seems to point to a common command signal. This result was corroborated by experiments in which eye and arm were found to jump always to the same target in the condition that two different targets were presented simultaneously.
研究了眼睛和手臂对单步和双步目标位移的运动，以调查眼睛和手臂的运动系统是否共享来自内部表征的共同指令信号，这些信号指定了：a）运动何时开始；b）运动的终点位置。对于向同一方向的单步和双步目标位移，眼睛和手臂运动开始时间之间的相关性显著。然而，如果第一和第二目标位移之间的时间间隔为75或100毫秒，对于向相反方向的双步目标位移，这种相关性较小且不显著。这表明，两个系统中指定运动何时开始的指令信号是不同的。然而，内部表征中指定运动终点位置的重构信号，对于眼睛和手臂运动来说相当相似，这似乎表明存在共同的指令信号。在同时呈现两个不同目标的情况下，眼睛和手臂总是跳到同一目标的实验证实了这一结果。
