Department of Psychology, University of Otago, Dunedin, New Zealand.
Psychophysiology. 2012 Jul;49(7):970-9. doi: 10.1111/j.1469-8986.2012.01376.x. Epub 2012 May 7.
The neural processes underlying an unplanned shift in movement control across limb systems were studied by recording event-related potentials (ERPs) as participants made a left or right hand movement followed by a left or right foot movement or vice versa. ERPs associated with both first and second movements replicated a recent finding that Cz is more positive before hand than foot responses. Lateralized readiness potentials (LRPs) associated with the first movement replicated patterns observed previously with single movements, but LRPs leading up to the second movement depended strongly on the side of the first movement, possibly because of residual lateralization from it. Overall, the results suggest that the motor processes associated with limb system selection can be fully reset prior to a switch between hand and foot movements, but the processes associated with side selection may not be.
研究人员通过记录事件相关电位（ERPs）来研究在肢体系统之间进行无计划的运动控制转移的神经过程，参与者先进行左手或右手运动，然后再进行左脚或右脚运动，或者反之亦然。与第一和第二运动相关的 ERPs 复制了最近的一项发现，即 Cz 在手部反应之前比脚部反应更积极。与第一运动相关的侧准备电位（LRPs）复制了之前观察到的单一运动模式，但引导第二运动的 LRPs强烈依赖于第一运动的侧，可能是因为它的残留侧化。总的来说，结果表明，在手和脚运动之间进行切换之前，可以完全重置与肢体系统选择相关的运动过程，但与侧选择相关的过程可能无法重置。
