Conditions determining early modification of motor programmes in response to changes in target location
Conditions determining early modification of motor programmes in response to changes in target location
复制标题
确定运动程序早期修改以响应目标位置变化的条件
DOI：
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发表时间：
2004
影响因子：
2
通讯作者：
C. C. A. M. Gielen
中科院分区：
文献类型：
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作者：
J. F. van Sonderen;J. J. Denier van der Gon;C. C. A. M. Gielen
摘要 研究了手臂运动对二维空间中双步刺激的响应。两次连续目标呈现之间的刺激间间隔 (ISI) 在 25、50、75 和 100 毫秒之间随机变化。当 ISI 为 25 或 50 毫秒时，运动轨迹有时会在运动一开始就被第二个目标修改。从初始移动方向的变化可以明显看出这种修改。当运动反应时间减去 ISI 大于 200 ms 时，初始运动方向发生变化。这些修改后的运动的初始运动方向位于第一目标和第二目标之间。为了解释结果，我们得出结论：1）目标位置的内部表示逐渐转移到其最终位置，2）运动程序使用可能尚未到达最终位置的当前内部表示作为运动目标。
SummaryArm movements were studied in response to double-step stimuli in two-dimensional space. The inter-stimulus interval (ISI) between the two successive target presentations varied randomly between 25, 50, 75 and 100 ms. When ISI was 25 or 50 ms movement trajectories were sometimes modified by the second target already at the very onset of the movement. This modification was apparent from a change in the initial movement direction. A change in the initial movement direction occurred when the reaction time of the movement minus ISI was greater than 200 ms. The initial movement direction of these modified movements was in between the first and second target. To explain the results we conclude that 1) the internal representation of target position shifts gradually to its final position and 2) the motor programme uses as the goal of the movement this current internal representation that may not yet have reached that final position.
影响因子：
2.5
作者：
GEORGOPOULOS, AP;KALASKA, JF;MASSEY, JT
通讯作者：
MASSEY, JT