Department of Psychology, University of Glasgow, Glasgow, Scotland, UK.
Psychophysiology. 2011 May;48(5):633-44. doi: 10.1111/j.1469-8986.2010.01126.x. Epub 2010 Sep 29.
Using a response precuing task, we investigated whether motor preparation of temporal response features follows a fixed order as implied by the generalized motor program (GMP) view. Relative timing and overall duration of sequential key presses were factorially manipulated. Precues either provided no information, provided partial information about relative or overall duration, or fully specified the response. Reaction time decreased with the amount of advance information, reflecting the reduction of response alternatives by the precue and influences on preparatory motor processes. The contingent negative variation (CNV) over the left but not the medial and right motor regions increased with the amount of advance information provided. The foreperiod lateralized readiness potential indicated hand-specific activation for the full precue condition only. These findings disagree with the assumption that a GMP's invariant and variable response features are prepared in fixed order.
我们使用反应前提示任务来研究时间反应特征的运动准备是否遵循广义运动程序（GMP）观点所暗示的固定顺序。相对时间和连续按键的总持续时间被进行了析因操作。提示要么不提供任何信息，要么提供相对或总持续时间的部分信息，要么完全指定响应。反应时间随着提前信息的增加而减少，这反映了提示减少了反应选择，并对预备运动过程产生了影响。左运动区而非中运动区和右运动区的负变（CNV）随着提供的提前信息的增加而增加。预备期外侧化准备电位仅在手完全提示条件下表现出手特异性激活。这些发现与 GMP 的不变和可变响应特征以固定顺序准备的假设不一致。
