Access Restriction

Author Dehaene, Stanislas
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Nonconscious Process ♦ Distinct Form ♦ Evidence Accumulation ♦ Se Minaire Poincare Conscious ♦ Se Minaire Poincare Xii ♦ Conscious Perception ♦ Nonconscious Processing ♦ Evidence Accumulation Model ♦ Brain Activation ♦ Specialized Subcircuits ♦ Distributed Global Workspace ♦ Different Ex-perimental Condition ♦ Visual Stimulus ♦ Evi-dence Accumulation ♦ Cognitive Neuroscience ♦ Multiple Brain Processor ♦ Long Axon ♦ Conscious Access ♦ Conscious Nonconscious Dichotomy ♦ Major Challenge ♦ Many Brain Event ♦ Neuronal Mechanism ♦ Theoretical Interpretation ♦ Elementary Psy-chophysical Decision
Abstract Abstract. Among the many brain events evoked by a visual stimulus, which ones are associated specifically with conscious perception, and which merely reflect nonconscious processing? Understanding the neuronal mechanisms of conscious-ness is a major challenge for cognitive neuroscience. Recently, progress has been achieved by contrasting behavior and brain activation in minimally different ex-perimental conditions, one of which leads to conscious perception whereas the other does not. This chapter reviews briefly this line of research and specu-lates on its theoretical interpretation. I propose to draw links between evidence accumulation models, which are highly successful in capturing elementary psy-chophysical decisions, and the conscious/nonconscious dichotomy. In this frame-work, conscious access would correspond to the crossing of a threshold in evi-dence accumulation within a distributed global workspace, a set of recurrently connected neurons with long axons that is able to integrate and broadcast back evidence from multiple brain processors. During nonconscious processing, evi-dence would be accumulated locally within specialized subcircuits, but would
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article