Biological Computation Indexes of Brain Oscillations in Unattended Facial Expression Processing Based on Event-Related Synchronization/Desynchronization.
Biological Computation Indexes of Brain Oscillations in Unattended Facial Expression Processing Based on Event-Related Synchronization/Desynchronization.
复制标题
基于事件相关同步/去同步的无人参与面部表情处理中脑振荡的生物计算指标。
DOI：
10.1155/2016/8958750
复制
发表时间：
2016
影响因子：
--
通讯作者：
Wang X
中科院分区：
文献类型：
--
作者：
Yu B;Ma L;Li H;Zhao L;Bo H;Wang X
从脑电信号中提取人类情感信息是情感脑机接口研究的重要内容。本研究探讨了非注意条件下典型脑振荡在面孔表情加工中的事件相关同步化（ERS）和事件相关去同步化（ERD）。结果表明，低频带主要用于更新表情和区分异常刺激与标准刺激，而高频带则与不同表情的自动加工有关。据此，我们通过ERD和ERS的测量，建立了每一次脑振荡与加工无人注意表情的关系。本研究首次揭示了前注意阶段各频段对表情理解的贡献。这也证明了被试在非注意条件下也有情绪体验。因此，通过脑震荡不同频段的ERD/ERS计算指标，可以真实的实时识别用户在非注意状态下的情绪状态，将其应用于情感BCI，为用户提供更自然、更友好的方式。
Estimation of human emotions from Electroencephalogram (EEG) signals plays a vital role in affective Brain Computer Interface (BCI). The present study investigated the different event-related synchronization (ERS) and event-related desynchronization (ERD) of typical brain oscillations in processing Facial Expressions under nonattentional condition. The results show that the lower-frequency bands are mainly used to update Facial Expressions and distinguish the deviant stimuli from the standard ones, whereas the higher-frequency bands are relevant to automatically processing different Facial Expressions. Accordingly, we set up the relations between each brain oscillation and processing unattended Facial Expressions by the measures of ERD and ERS. This research first reveals the contributions of each frequency band for comprehension of Facial Expressions in preattentive stage. It also evidences that participants have emotional experience under nonattentional condition. Therefore, the user's emotional state under nonattentional condition can be recognized in real time by the ERD/ERS computation indexes of different frequency bands of brain oscillations, which can be used in affective BCI to provide the user with more natural and friendly ways.