Barking up the wrong free: readiness potentials reflect processes independent of conscious will
Barking up the wrong free: readiness potentials reflect processes independent of conscious will
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DOI：
10.1007/s00221-013-3479-3
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发表时间：
2013-09-01
影响因子：
2
通讯作者：
Wheatley, Thalia
中科院分区：
文献类型：
--
作者：
Schlegel, Alexander;Alexander, Prescott;Wheatley, Thalia
在20世纪80年代早期，利贝特发现，头皮中央部位的准备电位（RP）平均在报告的意识到愿意移动（W）的时间之前几百毫秒开始。Haggard和Eimer Exp Brain Res 126（1）：128-133，（1999）后来发现RP和W的定时之间没有相关性，表明RP不反映W的因果过程。然而，他们确实发现了偏侧准备电位（LRP）的起始与W之间的正相关，这表明LRP可能反映了W的因果过程。在这里，我们报告了一个失败的复制哈格德和艾默的LRP发现与一个更大的组的参与者和几个变化，他们的分析方法。尽管我们确实在LRP的12项相关分析中的一项中发现了受试者之间的相关性，但至关重要的是，我们发现LRP发作和W之间没有受试者内协变。这些结果表明，RP和LRP反映的过程独立于意志和意识。这一结论对我们理解运动行为的神经基础具有重要意义，并可能对自由意志和意识的因果作用的论点产生影响。
In the early 1980s, Libet found that a readiness potential (RP) over central scalp locations begins on average several hundred milliseconds before the reported time of awareness of willing to move (W). Haggard and Eimer Exp Brain Res 126(1):128-133, (1999) later found no correlation between the timing of the RP and W, suggesting that the RP does not reflect processes causal of W. However, they did find a positive correlation between the onset of the lateralized readiness potential (LRP) and W, suggesting that the LRP might reflect processes causal of W. Here, we report a failure to replicate Haggard and Eimer's LRP finding with a larger group of participants and several variations of their analytical method. Although we did find a between-subject correlation in just one of 12 related analyses of the LRP, we crucially found no within-subject covariation between LRP onset and W. These results suggest that the RP and LRP reflect processes independent of will and consciousness. This conclusion has significant implications for our understanding of the neural basis of motor action and potentially for arguments about free will and the causal role of consciousness.