Taya F, Sekine T, Tanabe T, Mogi K, 2007, "Neural correlates of changes in visual perception" Perception 36 ECVP Abstract Supplement
Neural correlates of changes in visual perception
F Taya, T Sekine, T Tanabe, K Mogi
In the comparison of two images separated either spatially or temporarily, in principle only differences can be perceived. It cannot be known whether the images are the same. Change blindness, where subjects experience difficulties in finding a difference between two images presented sequentially and separated by blanks, has been studied in the context of visual short-term memory (vSTM). It is interesting to consider changes in perception after knowing the difference in the images, as dramatic changes in visual awareness accompany the change detection. Here, we studied changes in visual awareness during the search for differences between two visual images. We recorded the brain activities using electroencephalography (EEG) and compared activities elicited when subjects are unaware of differences with the activities invoked when the subjects are aware of the differences. By using temporal signatures tagged by the stimuli, we found that activities in frontal regions were correlated with the state of subjective perception. On the basis of these results, we discuss the changes of brain states induced by those in visual awareness.
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