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The interactive cortical activities among multiple areas in human's motion-in-depth perception

【摘要】:正Objective Motion-in-depth(MID),such as visual collision,is an important issue in the study of visual motion perception.It is important to know firstly how the brain processes the visual information in such a motion detection task before it informs the motor system to escape a dangerous approaching object.Many well-conducted animal electrophysiological studies have been performed and some brain areas covering parietal and occipital lobe,especially MT,were found active in the MID course.However,it is a pity that most of the former studies always investigated the active brain area on its own.The present study is to explore the relationship among these active regions of interested(ROIs) for their critical role on the MID perception.Methods The studies on 128-channels event-related potential(ERP) and functional magnetic resource imaging(fMRI) on the motion-in-depth(MID) course.Results(1) Both ERP and fMRI results indicated that motion-in-depth stimuli(whether approaching or receding) activated multiple brain areas,including occipital area,parietal area and frontal area.(2) These active areas worked well dependently.(3) The top-down modulation from frontal lobe and the phase synchronous responses among multi areas might be always happened for fluent MID perception persistently. Conclusion The mutual relationships and interactions among the multi active areas more likely took critical role on the MID perception.

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