Martijn E. Wokke, Ilja G. Sligte, H. Steven Scholte and Victor A. F. Lamme Two critical periods in early visual cortex during figure–ground segregation Brain and Behavior 2
We studied the necessity of early visual cortex during different stages of visual perception. We therefore disrupted activity in V1/V2 with transcranial magnetic stimulation (TMS) at different time intervals while concurrently recording EEG signals. Results show that early visual cortex is not only essential in an early stage of vision when figure borders are detected, but subsequently contribute to more sophisticated stages of visual perception.
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