Abstract
In order to investigate how language and attention systems are affected by word boundary information during reading, we conducted a functional magnetic resonance imaging (fMRI) experiment in which text-color in naturally unspaced Chinese sentences were systematically manipulated in three experimental conditions, that is, text-color alternation consistent or inconsistent with word boundary (i.e., alternating-color word and non-word conditions), as well as a mono-color baseline condition. Twenty college students (14 females; 23.1 years old) were required to silently read 72 sentences during fMRI scanning. We found that the conditions of word boundary modulated the brain connections between the visual word form area (VWFA) and dorsal attention regions, and between the VWFA and language-related regions. These results suggest that the coordination between the VWFA and dorsal attention regions plays an important role in grouping characters and guiding the saccade according to perceptual grouping based on color, and that the connection between VWFA and MTG could be the neural mechanism of lexical access during Chinese text reading.
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