Maksimenko Vladimir A, Runnova Anastasia E, Frolov Nikita S, Makarov Vladimir V, Nedaivozov Vladimir, Koronovskii Alexey A, Pisarchik Alexander, Hramov Alexander E
Yuri Gagarin State Technical University of Saratov, REC "Artificial Intelligence Systems and Neurotechnologies", Saratov, 410054, Russia.
Saratov State University, Faculty of Nonlinear Processes, Saratov, 410012, Russia.
Phys Rev E. 2018 May;97(5-1):052405. doi: 10.1103/PhysRevE.97.052405.
Stimulus-related brain activity is considered using wavelet-based analysis of neural interactions between occipital and parietal brain areas in alpha (8-12 Hz) and beta (15-30 Hz) frequency bands. We show that human sensory processing related to the visual stimuli perception induces brain response resulted in different ways of parieto-occipital interactions in these bands. In the alpha frequency band the parieto-occipital neuronal network is characterized by homogeneous increase of the interaction between all interconnected areas both within occipital and parietal lobes and between them. In the beta frequency band the occipital lobe starts to play a leading role in the dynamics of the occipital-parietal network: The perception of visual stimuli excites the visual center in the occipital area and then, due to the increase of parieto-occipital interactions, such excitation is transferred to the parietal area, where the attentional center takes place. In the case when stimuli are characterized by a high degree of ambiguity, we find greater increase of the interaction between interconnected areas in the parietal lobe due to the increase of human attention. Based on revealed mechanisms, we describe the complex response of the parieto-occipital brain neuronal network during the perception and primary processing of the visual stimuli. The results can serve as an essential complement to the existing theory of neural aspects of visual stimuli processing.
使用基于小波的分析方法，研究枕叶和顶叶脑区在α（8 - 12赫兹）和β（15 - 30赫兹）频段的神经交互作用，以此来考量与刺激相关的大脑活动。我们发现，与视觉刺激感知相关的人类感觉处理会诱发大脑反应，从而在这些频段产生不同的枕顶叶交互方式。在α频段，枕顶叶神经元网络的特征是枕叶和顶叶内部以及它们之间所有相互连接区域的交互作用均呈现均匀增加。在β频段，枕叶在枕顶叶网络动态中开始发挥主导作用：视觉刺激的感知会激发枕叶区域的视觉中枢，然后，由于枕顶叶交互作用的增强，这种兴奋会传递到顶叶区域，即注意力中枢所在之处。当刺激具有高度模糊性时，我们发现由于人类注意力的增强，顶叶中相互连接区域之间的交互作用会有更大程度的增加。基于所揭示的机制，我们描述了视觉刺激感知和初级处理过程中枕顶叶脑神经元网络的复杂反应。这些结果可作为对现有视觉刺激处理神经方面理论的重要补充。
