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人类大脑中自由决策的无意识决定因素
Unconscious determinants of free decisions in the human brain |
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| 课程网址: |
http://videolectures.net/eccs08_haynes_udofdithb/
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| 主讲教师: |
John-Dylan Haynes
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| 开课单位: |
柏林洪堡大学
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| 开课时间: |
2008-10-17
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| 课程语种: |
英语
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| 中文简介: |
关于主观“自由”决策是否由大脑活动提前确定，一直存在争议。先前声称主观决策先于大脑活动的主张在参与者的主观报告中被高度批评为不准确。此外，尚不清楚是否在运动相关的大脑区域开始行动的意图，或是否涉及高水平的大脑区域。在这里，我们使用统计模式识别和fMRI的组合来表明决策的结果可以从前额叶和顶叶皮层的大脑活动中解码，甚至在它们进入意识之前最多十秒。这种延迟太长，无法用于衡量意识意图开始的不准确性。相反，它可能反映了高水平控制区域网络的运行，这些区域在缓慢的时间范围内运行，并且在它进入意识之前很久就开始准备即将到来的决定。这表明我们的自由选择可以通过大脑活动来确定，而不是普遍认可的。
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| 课程简介: |
There has been a long debate whether subjectively "free" decisions are determined by brain activity ahead of time. Previous claims that subjective decisions are preceded by brain activity have been highly criticized as inaccuracies in the participants' subjective reports. Also, it has remained unclear whether an intention to act is initiated in motor-related brain regions, or if high-level brain areas are involved. Here we use a combination of statistical pattern recognition and fMRI to show that the outcome of decisions can be decoded from brain activity in prefrontal and parietal cortex even up to ten seconds before they enter awareness. This delay is too long to be accounted for by inaccuracies in measuring the onset of conscious intentions. Instead it presumably reflects the operation of a network of high-level control areas that operate at a slow timescale and begin to prepare an upcoming decision long before it enters awareness. This suggests that our free choices can be determined by brain activity much earlier than commonly appreciated.
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| 关 键 词: |
大脑活动; 前额叶; 顶叶皮层
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| 课程来源: |
视频讲座网
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| 最后编审: |
2019-03-20：lxf
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| 阅读次数: |
141
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