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fMRI study of the visual search for self-controlling moving objects

[Speaker] Horita, Kazume:1
[Co-author] Yoshida, Takako:1
1:Tokyo Institute of Technology (Japan)

It is reported that self-controlled moving object was visually searched faster than other-controlled one. To examine the relationship between attention, multimodal congruency, and sense of agency that "I," not "other," is controlling the object, we measured the BOLD signals for the self- and other- controlling objects. Subjects searched for a target among other objects moving around randomly, while freely controlled the target position using trackball. Self-generated real-time control (SE) and the target position following the other individual's trackball instead of the participant's trackball (OT) were two of four conditions. The comparison between OT and SE showed activation in the bilateral inferior parietal cortex and corpus callosum. These results suggest that the bilateral inferior parietal cortex is involved in the monitoring of the multimodal congruency of the predicted and actual outcomes and recruited when they don't match. The relationship between this monitoring function and visual attention is discussed in this report.
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