Vidal F, Bonnet M, Macar F
Cognitive Neuroscience Unit, Laboratory of Functional Neurosciences, Centre National de la Recherche Scientifique, Marseille, France.
J Mot Behav. 1991 Dec;23(4):226-34. doi: 10.1080/00222895.1991.9942033.
To determine whether the duration of certain motor activities can be a prespecified dimension of the motor program, we studied the duration of a motor response and the hand to be used, in a precueing paradigm. The response to be produced (a press on a push-button) was either short or long and involved either the right or the left hand. In Experiment 1, 200 and 700 ms (Block 1) or 700 and 2,500 ms (Block 2) were respectively chosen as short and long durations. No RT difference between short and long appeared when response duration was certain. When response duration was uncertain, RTs were longer for long than for short responses. In addition, the RTs that preceded the 700-ms response were longer in Block 1 than in Block 2. These results suggest that response duration can be programmed up to 2,500 ms and that the relative duration of a response in a given range is more relevant for programming mechanisms than its absolute duration. In Experiment 2, uncertainty concerning the response was maintained constant in a similar precueing paradigm, in which only 700-and 2,500-ms response durations were considered. The RTs preceding a long duration were shorter when duration was certain than when neither side nor duration was certain. No RT difference appeared before the short response duration. This seems to confirm that duration can be programmed up to 2,500 ms and also suggests that the program elaborated for the short duration constitutes a common basis for short and long responses: When duration is uncertain, programming a long duration requires just an additional operation to complete the program corresponding to the short duration, which has already been selected by default.
为了确定某些运动活动的持续时间是否可以作为运动程序预先设定的维度，我们在预提示范式中研究了运动反应的持续时间以及所使用的手。要产生的反应（按下按钮）要么短要么长，并且涉及右手或左手。在实验1中，分别选择200毫秒和700毫秒（第1组）或700毫秒和2500毫秒（第2组）作为短和长的持续时间。当反应持续时间确定时，短反应和长反应之间没有反应时间差异。当反应持续时间不确定时，长反应的反应时间比短反应的更长。此外，在第1组中，700毫秒反应之前的反应时间比第2组更长。这些结果表明，反应持续时间可以编程到2500毫秒，并且在给定范围内反应的相对持续时间比其绝对持续时间对于编程机制更相关。在实验2中，在类似的预提示范式中，关于反应的不确定性保持不变，其中只考虑700毫秒和2500毫秒的反应持续时间。当持续时间确定时，长持续时间之前的反应时间比当一侧和持续时间都不确定时更短。在短反应持续时间之前没有出现反应时间差异。这似乎证实了持续时间可以编程到2500毫秒，并且还表明为短持续时间制定的程序构成了短反应和长反应的共同基础：当持续时间不确定时，对长持续时间进行编程只需要额外的操作来完成与短持续时间相对应的程序，该程序已经默认被选择。
