Semjen A
Laboratoire de Neurosciences Cognitives, Centre National de la Recherche Scientifique, Marseille.
Percept Mot Skills. 1994 Aug;79(1 Pt 1):143-52. doi: 10.2466/pms.1994.79.1.143.
Motor program updating was studied by asking 2 subjects to modify the accent pattern of rapid finger-tapping sequences during execution. The tap to be accentuated was changed unpredictably in one-third of the trials; on these trials the signal indicating the new accent position was delivered upon the onset of the first tap. The probability of placing the new accent correctly increased when the tap to be accentuated was shifted towards the end of the sequence. The probability of cancelling the initially prepared accent showed a similar pattern. Successful updating of the accent pattern could be achieved without any mistiming of the successive taps. These findings are taken to indicate the existence of a temporal overlap between the execution of the initial part of the sequence and the programming of the later part.
通过要求2名受试者在执行快速手指敲击序列时修改重音模式来研究运动程序更新。在三分之一的试验中，要加重音的敲击会不可预测地改变；在这些试验中，指示新重音位置的信号在第一次敲击开始时发出。当要加重音的敲击向序列末尾移动时，正确放置新重音的概率增加。取消最初准备的重音的概率也呈现类似模式。可以在不出现连续敲击时间错误的情况下成功更新重音模式。这些发现表明，序列初始部分的执行与后续部分的编程之间存在时间重叠。
