Brain-wide synchronization networks subserve attention
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1
Ernst Strüngmann Institute, Germany
Changes in behavioral context require adaptive changes of inter-areal interactions. Interactions between neuronal groups are subserved by the synchronization of rhythmic activities in those groups. Thus, inter-areal synchronization might be modulated in accordance with behavioral context. Behavioral context is particularly well controlled when one stimulus out of several is behaviorally relevant and the corresponding signals are routed preferentially. We recorded local field potentials from a 252-electrode electrocorticogram grid on the left hemispheres of two macaque monkeys. We found gamma (60 to 90 Hz) synchronization among several distant visual areas, and beta-1 (18 Hz) synchronization linking parietal areas to both frontal and occipital areas. Gamma synchronization was primarily bottom-up, beta-1 synchronization primarily top-down. Each of these inter-areal synchronizations was enhanced when the stimulus processed by the recorded neuronal groups was behaviorally relevant. These results suggest that relevant signals are routed preferentially through the selective synchronization among corresponding brain area.
Keywords:
electrocorticogram,
gamma synchronization,
inter-areal synchronization
Conference:
XI International Conference on Cognitive Neuroscience (ICON XI), Palma, Mallorca, Spain, 25 Sep - 29 Sep, 2011.
Presentation Type:
Keynote Lecture
Topic:
Keynote Lectures
Citation:
Fries
P
(2011). Brain-wide synchronization networks subserve attention.
Conference Abstract:
XI International Conference on Cognitive Neuroscience (ICON XI).
doi: 10.3389/conf.fnhum.2011.207.00004
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Received:
02 Nov 2011;
Published Online:
08 Nov 2011.
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Correspondence:
Dr. Pascal Fries, Ernst Strüngmann Institute, Frankfurt, Germany, pascal.fries@esi-frankfurt.de