Synchronized network activity as the origin of a P300 component in a facial attractiveness judgment task.
Synchronized network activity as the origin of a P300 component in a facial attractiveness judgment task.
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DOI：
10.1111/psyp.12153
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发表时间：
2014-03
期刊：
影响因子：
3.7
通讯作者：
Yuan Zhang;A. Tang;Xiaolin Zhou
中科院分区：
文献类型：
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作者：
Yuan Zhang;A. Tang;Xiaolin Zhou
许多研究使用P300作为认知加工和神经/精神障碍的指标。在这里，我们结合源分离和源定位的方法来调查皮层起源的P300引起的面部吸引力判断任务。对于每个参与者，我们应用二阶盲识别（SOBI）的连续EEG数据分解的大脑信号和噪声的混合物。然后，我们使用等效电流偶极子（ECD）模型来估计SOBI恢复的P300的中心性。我们发现，ECD模型，包括偶极子在额叶和后联合皮层，解释96.5 ± 0.5%的方差在头皮投影的组成部分。考虑到不同脑区恢复的偶极子活动具有相同的时间过程，但权重不同，我们得出结论，P300起源于大脑前部和后部之间的同步活动。
Many studies have used the P300 as an index for cognitive processing and neurological/psychiatric disorders. Here, we combined the source separation and source localization methods to investigate the cortical origins of the P300 elicited in a facial attractiveness judgment task. For each participant, we applied second-order blind identification (SOBI) to continuous EEG data to decompose the mixture of brain signals and noise. We then used the equivalent current dipole (ECD) models to estimate the centrality of the SOBI-recovered P300. We found that the ECD models, consisting of dipoles in the frontal and posterior association cortices, account for 96.5 ± 0.5% of variance in the scalp projection of the component. Given that the recovered dipole activities in different brain regions share the same time course with different weights, we conclude that the P300 originates from synchronized activity between anterior and posterior parts of the brain.