The functional significance of EEG phase synchronization networks during information integration of left and right visual fields
Objects moving between the left and right visual hemifields are naturally perceived as continuous entities, although early visual processing independently transmits information from the two hemifields. Therefore, interhemispheric integration of visual information is essential for maintaining an object's identity. Additionally, brain function is thought to be maintained through a dynamic balance…
A study using electroencephalography (EEG) and a visual integration task explored the neural mechanisms behind visual hemifield integration in healthy adults. By employing a frequency-inclusive, data-driven network analysis, researchers discovered a broadband EEG phase synchronization network that emerged only under conditions requiring high interhemispheric integration.
This network composed of large-scale phase synchronization across multiple frequencies was crucial for maintaining object identity by integrating information from both left and right visual hemifields. The analysis also revealed a connection between individual differences in behavioral performance and the modulation of interhemispheric synchronization, with these relationships varying depending on participants' relative performance across task conditions.
These findings underscore the significance of visual hemifield integration, which relies on extensive phase synchronization networks, and highlight the importance of balancing integration and segregation in brain function.
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