Volume 80, Number 4, November 2007
|Number of page(s)||6|
|Published online||23 October 2007|
Noise-induced large-scale phase synchronization of human-brain activity associated with behavioural stochastic resonance
Laboratory for Dynamics of Emergent Intelligence, RIKEN Brain Science Institute 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
2 Educational Physiology Laboratory, Graduate School of Education, The University of Tokyo 7-3-1 Bunkyo-ku, Tokyo, 113-0033, Japan
3 Psychophysics and Cognitive Neuroscience Laboratory, Department of Psychology, The University of British Columbia - 2136 West Mall, Vancouver, British Columbia, V6T 1Z4, Canada
Accepted: 24 September 2007
We demonstrate that both detection of weak visual signals to the right eye and phase synchronization of electro-encephalogram (EEG) signals from widely separated areas of the human brain are increased by addition of weak visual noise to the left eye. We found a close relationship between the resulting noise-induced changes in behavioural performance and the similarly resulting changes in phase synchronization between widely separated brain areas. These results imply that noise-induced large-scale neural synchronization may play a significant role in information transmission in the brain.
PACS: 05.40.Ca – Noise / 05.45.Xt – Synchronization; coupled oscillators / 87.19.Dd – Information processing in vision and hearing
© Europhysics Letters Association, 2007
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