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Cerebral Cortex Advance Access originally published online on August 24, 2005
Cerebral Cortex 2006 16(5):712-717; doi:10.1093/cercor/bhj017
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© The Author 2005. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oupjournals.org

Right Parietal Cortex Plays a Critical Role in Change Blindness

Diane M. Beck1, Neil Muggleton2,3, Vincent Walsh2,3 and Nilli Lavie2,3

1 Department of Psychology, Princeton University, Green Hall, Princeton, NJ 08544, USA, 2 Department of Psychology, University College London, London, UK and 3 Institute of Cognitive Neuroscience, University College London, London, UK

Address correspondence to Dr Diane Beck, Department of Psychology, University of Illinois, 603 East Daniel Street, Champaign, IL 61820, USA. E-mail: dbeck{at}heschl.cns.uiuc.edu.

There is increasing evidence from functional magnetic resonance imaging (fMRI) that visual awareness is not only associated with activity in ventral visual cortex but also with activity in the parietal cortex. However, due to the correlational nature of neuroimaging, it remains unclear whether this parietal activity plays a causal role in awareness. In the experiment presented here we disrupted activity in right or left parietal cortex by applying repetitive transcranial magnetic stimulation (rTMS) over these areas while subjects attempted to detect changes between two images separated by a brief interval (i.e. 1-shot change detection task). We found that rTMS applied over right parietal cortex but not left parietal cortex resulted in longer latencies to detect changes and a greater rate of change blindness compared with no TMS. These results suggest that the right parietal cortex plays a critical role in conscious change detection.

Key Words: change detection • humans • parietal cortex • rTMS • visual awareness


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