Inouye T, Yagasaki A, Takahashi H, Shinosaki K
Electroencephalogr Clin Neurophysiol. 1981 Mar;51(3):265-75. doi: 10.1016/0013-4694(81)90140-1.
Hemispheric specialization for the linguistic process was studied by the 'entropy analysis' method which distinguishes the direction of information flow for mutually coupled time series. Meaningful and non-meaningful stimuli were presented to 14 subjects. EEGs were recorded from homologous Wernicke's and occipital areas in the two hemispheres. The amount of information flow both from the left to right hemisphere and from the right to left hemisphere was obtained under the 3 conditions (i.e., meaningful, non-meaningful and resting baseline conditions) in each area. The information flow from the left to right hemisphere was significantly larger under the meaningful condition than from the right to left hemisphere in Wernicke's area, but no significant differences in the information flow could be found between the two directions under the non-meaningful condition in Wernicke's or the occipital area. Therefore, the dominant direction of the left to right hemisphere was observed under the meaningful condition in Wernicke's area but not in the occipital (non-speech) area, while no dominant direction was observed under the two control (i.e., non-meaningful and baseline) conditions in either area. These results may suggest that the dominant direction of information flow with the meaningful stimuli is related to linguistic meaningfulness in Wernicke's area.
通过“熵分析”方法研究了语言加工过程中的半球特化，该方法可区分相互耦合的时间序列中的信息流方向。向14名受试者呈现了有意义和无意义的刺激。记录了两个半球中同源韦尼克区和枕叶区的脑电图。在每个区域的三种条件下（即有意义、无意义和静息基线条件），获取了从左半球到右半球以及从右半球到左半球的信息流数量。在有意义条件下，韦尼克区从左半球到右半球的信息流明显大于从右半球到左半球，但在韦尼克区或枕叶区的无意义条件下，两个方向的信息流没有显著差异。因此，在有意义条件下，韦尼克区观察到从左半球到右半球的主导方向，而枕叶（非言语）区未观察到，而在两个对照条件（即无意义和基线）下，两个区域均未观察到主导方向。这些结果可能表明，有意义刺激下的信息流主导方向与韦尼克区的语言意义有关。
