Abstract
In this study, we employed neuromagnetic measurements (MEG) to evaluate both (a) the dynamic changes in the spontaneous brain activities and (b) the spatiotemporal distributions of the event-related brain activities related to the perception of third dimension from 2D optic flow. Both the event-related changes in the spontaneous brain activities and the brain responses evoked by the same events showed significant changes in the parietal, parieto-occipital, and occipito-temporal regions between the 2D and 3D perception conditions. The results indicate that these regions play an important role in the perception of 3D structure from 2D optic flow, which are in agreement with the previous studies of 3D structure perception from motion using fMRI in terms of the location of the activation, and adding further insight into the temporal characteristics of the neural activities in those regions.
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