Wang G, Takigawa M, Matsushita T
Department of Environmental Medicine, Faculty of Medicine, Kagoshima University, Japan.
Jpn J Psychiatry Neurol. 1991 Dec;45(4):843-54. doi: 10.1111/j.1440-1819.1991.tb00523.x.
A method of spatiotemporal analysis, using time series analysis techniques to represent activity in multiple brain regions, was applied to the interpretation of EEG information changes between the frontal and occipital areas during speech. This paper proposes and discusses a bidirectional communication model between the frontal and occipital cortices. Entropy analysis was introduced and used to simplify the calculation of transinformation in two dimensions. In this work, transinformation with direction between the frontal and occipital cortices before and during speech was investigated quantitatively for 11 subjects. The dominant information flow in the occipital-frontal direction was found immediately before speech in the right hemisphere. During speech, the dominant information flow was found in the occipital-frontal direction in both the right and left hemispheres. These results suggest that the method used in our work is feasible to analyze EEG signals in language processes.
一种时空分析方法，利用时间序列分析技术来表示多个脑区的活动，被应用于解释言语过程中额叶和枕叶区域之间的脑电图信息变化。本文提出并讨论了额叶和枕叶皮质之间的双向通信模型。引入了熵分析并用于简化二维互信息的计算。在这项工作中，对11名受试者定量研究了言语前后额叶和枕叶皮质之间具有方向的互信息。在右半球，紧接言语之前发现枕叶到额叶方向的主要信息流。在言语过程中，在右半球和左半球均发现枕叶到额叶方向的主要信息流。这些结果表明，我们工作中使用的方法对于分析语言过程中的脑电图信号是可行的。
