Brown Bag du 25/09/17 à 11h Dr. Marine Vernet (NIH, Bethesda MD, US)



Building-up conscious visual percepts

How does visual awareness emerge from brain activity? In this presentation, we examine how conscious percepts are regulated by attentional networks in order to be maintained or reinterpreted. We show that such attentional processes impact the subjective feeling of seeing independently from objective visual performance. In a second part, we describe the neural substrate of a gradual awareness build-up, in contrast with sharp attentional stabilization mechanisms. These questions are addressed with psychophysics, transcranial magnetic stimulation, electroencephalography and functional magnetic resonance imaging. Specific neural predictions of philosophical models of consciousness will be used to interpret the findings. We will defend the thesis that awareness results from the integration of several cognitive functions modulating each others.