Tracking the unconscious generation of free decisions using ultra-high field fMRI.
Tracking the unconscious generation of free decisions using ultra-high field fMRI.
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DOI：
10.1371/journal.pone.0021612
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发表时间：
2011
期刊：
影响因子：
3.7
通讯作者：
Haynes JD
中科院分区：
文献类型：
--
作者：
Bode S;He AH;Soon CS;Trampel R;Turner R;Haynes JD
最近，我们使用功能性磁共振成像（fMRI）证明，自由决策的结果可以在达到有意识意识之前几秒钟从大脑活动中解码出来。前额极皮层（ba10）的活动模式在时间上首先携带意图相关信息，因此是无意识产生自由决策的候选区域。在本研究中，复制了原始范式，并将多元模式分类应用于使用7特斯拉超高场fMRI获得的额极皮质功能图像。在这里，我们表明，在做出决策之前记录的预测活动模式随着与有意识决策时间点的时间接近度的增加而变得越来越稳定。此外，详细的问卷调查探索了受试者在决策前和决策过程中的想法，证实了决策是自发做出的，受试者不知道他们的决策结果的演变。这些结果进一步证明，FPC在无意识的自由决策过程中处于前额叶执行层级的顶端。
Recently, we demonstrated using functional magnetic resonance imaging (fMRI) that the outcome of free decisions can be decoded from brain activity several seconds before reaching conscious awareness. Activity patterns in anterior frontopolar cortex (BA 10) were temporally the first to carry intention-related information and thus a candidate region for the unconscious generation of free decisions. In the present study, the original paradigm was replicated and multivariate pattern classification was applied to functional images of frontopolar cortex, acquired using ultra-high field fMRI at 7 Tesla. Here, we show that predictive activity patterns recorded before a decision was made became increasingly stable with increasing temporal proximity to the time point of the conscious decision. Furthermore, detailed questionnaires exploring subjects' thoughts before and during the decision confirmed that decisions were made spontaneously and subjects were unaware of the evolution of their decision outcomes. These results give further evidence that FPC stands at the top of the prefrontal executive hierarchy in the unconscious generation of free decisions.
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影响因子：
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通讯作者：
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作者：
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