论文标题
基于光谱动力学的想象语音和视觉图像的功能连通性
Functional Connectivity of Imagined Speech and Visual Imagery based on Spectral Dynamics
论文作者
论文摘要
大脑计算机界面技术的最新进展已显示出想象中的语音和视觉图像的潜力，这是直观的脑部计算机界面通信的强大范式。但是，尚未揭示两个范式的内部动力以及它们的内在特征。在本文中，我们研究了两个范式的功能连接性，考虑到各种频率范围。分析使用了16个执行十三级语音和视觉图像的受试者的数据集进行分析。在具有四个频率范围的七个皮层区域中分析了想象的语音和视觉图像的相锁定值。我们将想象中的语音和视觉图像的功能连通性与静息状态进行了研究，以研究图像过程中的大脑改变。在想象的语音和视觉图像期间，整个大脑区域的相锁定值均显示出显着下降。 Broca和Wernicke的区域以及听觉皮层主要显示出想象中的语音显着下降，前额叶皮层和听觉皮层显示了视觉图像范式的显着下降。对大脑连通性以及两个范式的解码性能的进一步研究可能起着至关重要的作用。
Recent advances in brain-computer interface technology have shown the potential of imagined speech and visual imagery as a robust paradigm for intuitive brain-computer interface communication. However, the internal dynamics of the two paradigms along with their intrinsic features haven't been revealed. In this paper, we investigated the functional connectivity of the two paradigms, considering various frequency ranges. The dataset of sixteen subjects performing thirteen-class imagined speech and visual imagery were used for the analysis. The phase-locking value of imagined speech and visual imagery was analyzed in seven cortical regions with four frequency ranges. We compared the functional connectivity of imagined speech and visual imagery with the resting state to investigate the brain alterations during the imagery. The phase-locking value in the whole brain region exhibited a significant decrease during both imagined speech and visual imagery. Broca and Wernicke's area along with the auditory cortex mainly exhibited a significant decrease in the imagined speech, and the prefrontal cortex and the auditory cortex have shown a significant decrease in the visual imagery paradigm. Further investigation on the brain connectivity along with the decoding performance of the two paradigms may play a crucial role as a performance predictor.
