Dasdemir Yasar, Yildirim Esen, Yildirim Serdar
Computer Engineering Department, Iskenderun Technical University, Hatay, Turkey.
Electrical and Electronic Engineering Department, Adana Science and Technology University, Adana, Turkey.
Cogn Neurodyn. 2017 Dec;11(6):487-500. doi: 10.1007/s11571-017-9447-z. Epub 2017 Jul 15.
In this study, we investigate the brain networks during positive and negative emotions for different types of stimulus (audio only, video only and audio + video) in [Formula: see text], and [Formula: see text] bands in terms of phase locking value, a nonlinear method to study functional connectivity. Results show notable hemispheric lateralization as phase synchronization values between channels are significant and high in right hemisphere for all emotions. Left frontal electrodes are also found to have control over emotion in terms of functional connectivity. Besides significant inter-hemisphere phase locking values are observed between left and right frontal regions, specifically between left anterior frontal and right mid-frontal, inferior-frontal and anterior frontal regions; and also between left and right mid frontal regions. ANOVA analysis for stimulus types show that stimulus types are not separable for emotions having high valence. PLV values are significantly different only for negative emotions or neutral emotions between audio only/video only and audio only/audio + video stimuli. Finding no significant difference between video only and audio + video stimuli is interesting and might be interpreted as that video content is the most effective part of a stimulus.
在本研究中，我们针对[公式：见正文]频段中不同类型的刺激（仅音频、仅视频以及音频 + 视频），通过锁相值（一种用于研究功能连接性的非线性方法）来探究积极和消极情绪期间的脑网络。结果显示出显著的半球侧化，因为所有情绪下通道间的相位同步值在右半球均显著且较高。就功能连接性而言，还发现左额叶电极对情绪具有控制作用。此外，在左右额叶区域之间观察到显著的半球间锁相值，特别是在左前额叶与右额中回、额下回和前额叶区域之间；以及左右额中回区域之间。对刺激类型的方差分析表明，对于具有高效价的情绪，刺激类型无法区分。仅在仅音频/仅视频与仅音频/音频 + 视频刺激之间的消极情绪或中性情绪中，锁相值存在显著差异。未发现仅视频与音频 + 视频刺激之间存在显著差异这一结果很有趣，可能被解释为视频内容是刺激中最有效的部分。
