图 书 馆
人脑中有意识加工的特征Signatures of Conscious Processing in the Human Brain |
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| 课程网址: | http://videolectures.net/nips2012_dehaene_brain/ |
| 主讲教师: | Stanislas Dehaene |
| 开课单位: | 法兰西学院 |
| 开课时间: | 2013-01-17 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | Understanding how brain activity leads to a conscious experience remains a major experimental challenge. I will describe a series of experiments that probe the signatures of conscious processing. In these experiments, my colleagues and I ask whether a specific type of brain activity can be detected when a person suddenly becomes aware of a piece of information. We create minimal contrasts whereby the very same visual stimulus is sometimes undetected, and sometimes consciously seen. We then use time-resolved methods of electro- and magnetoencephalography to follow the time course of brain activity. The results show that conscious access relates to a global burst of late synchronized activity (a cortical “ignition”), distributed through many cortical areas. We propose a theory of a global neuronal workspace, according to which what we experience as a consciousness is the global availability of information in a large-scale network of pyramidal neurons with long-distance axons. This knowledge is now being applied to the monitoring of conscious states in non-communicating patients. Using real-time signal processing techniques, we believe that a few minutes of testing with simple sounds and two recording electrodes might suffice to determine whether a person is conscious. |
| 关 键 词: | 大脑活动; 意识处理; 神经元工作空间 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2019-07-26：cwx |
| 阅读次数: | 55 |