Readiness potentials driven by non-motoric processes
Readiness potentials driven by non-motoric processes
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DOI：
10.1016/j.concog.2015.11.011
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发表时间：
2016-01-01
影响因子：
2.4
通讯作者：
Tse, Peter Ulric
中科院分区：
文献类型：
--
作者：
Alexander, Prescott;Schlegel, Alexander;Tse, Peter Ulric
大脑活动的增加被称为“准备电位”（RP），可以在导致意志定时运动的几秒钟内在头皮中央位置看到。这种活动先于意识到随后的运动多达两秒钟，并被假设为反映了前意识的计划和/或准备的运动。使用一种新的实验设计，我们梳理除了电机相关和非电机相关的过程的RP的相对贡献。我们的实验结果表明，强大的RP发生在没有运动和电机相关的过程没有显着调制RP。这表明，这里测量的RP不太可能反映前意识运动规划或随后运动的准备，而是可能反映本质上非运动的决策相关或预期过程。(C)2015 Elsevier Inc. All rights reserved.
An increase in brain activity known as the "readiness potential" (RP) can be seen over central scalp locations in the seconds leading up to a volitionally timed movement. This activity precedes awareness of the ensuing movement by as much as two seconds and has been hypothesized to reflect preconscious planning and/or preparation of the movement. Using a novel experimental design, we teased apart the relative contribution of motor-related and non-motor-related processes to the RP. The results of our experiment reveal that robust RPs occured in the absence of movement and that motor-related processes did not significantly modulate the RP. This suggests that the RP measured here is unlikely to reflect preconscious motor planning or preparation of an ensuing movement, and instead may reflect decision-related or anticipatory processes that are non-motoric in nature. (C) 2015 Elsevier Inc. All rights reserved.