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Open Access item Dynamical relaying can yield zero time lag neuronal synchrony despite long conduction delays

Authors:Vicente, Raúl
Gollo, Leonardo L.
Mirasso, Claudio R.
Fischer, Ingo
Pipa, Gordon
Keywords:Thalamocortical system, Isochronous oscillations, Phase locking, Long-range synchronization, Axonal latency
Issue Date:28-Oct-2008
Publisher:National Academy of Sciences (U.S.)
Citation:Proc. Natl. Acad. Sci. USA (PNAS) 105(44): 17157-17162 (2008)
Abstract:Multi-electrode recordings have revealed zero time-lag synchronization among remote cerebral cortical areas. However, the axonal conduction delays among such distant regions can amount to several tens of milliseconds. It is still unclear which mechanism is giving rise to isochronous discharge of widely distributed neurons, despite of such latencies. Here we investigate the synchronization properties of a simple network motif and found that, even in the presence of large axonal conduction delays, distant neuronal populations self-organize into lag-free oscillations. According to our results cortico-cortical association fibers as well as certain cortico-thalamo-cortical loops represent ideal circuits to circumvent the phase-shifts and time-lags associated with conduction delays.
Description:6 pages, 6 figures.-- PMID: 18957544 [PubMed].-- PMCID: PMC2575223.-- Printed version published Nov 4, 2008.-- Supporting information (4 pages) available at: http://www.pnas.org/content/105/44/17157/suppl/DCSupplemental
Full-text paper available Open Access at the journal site.
Publisher version (URL):http://dx.doi.org/10.1073/pnas.0809353105
Appears in Collections:(IFISC) Artículos

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