The dominant direction of interhemispheric EEG changes in the linguistic process

Electroencephalography and Clinical Neurophysiology
T InouyeK Shinosaki

Abstract

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 dom...Continue Reading

References

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Citations

Nov 1, 1982·Electroencephalography and Clinical Neurophysiology·Z BohdaneckýT Radil
Mar 1, 1983·Electroencephalography and Clinical Neurophysiology·T InouyeA Yagasaki
Apr 1, 1993·Electroencephalography and Clinical Neurophysiology·T InouyeY Matsumoto
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Dec 17, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Katarzyna J BlinowskaMaciej Kamiński

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