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- W1974733263 endingPage "e1002438" @default.
- W1974733263 startingPage "e1002438" @default.
- W1974733263 abstract "Anatomic connections between brain areas affect information flow between neuronal circuits and the synchronization of neuronal activity. However, such structural connectivity does not coincide with effective connectivity, related to the more elusive question Which areas cause the present activity of which others?. Effective connectivity is directed and depends flexibly on contexts and tasks. Here we show that a dynamic effective connectivity can emerge from transitions in the collective organization of coherent neural activity. Integrating simulation and semi-analytic approaches, we study mesoscale network motifs of interacting cortical areas, modeled as large random networks of spiking neurons or as simple rate units. Through a causal analysis of time-series of model neural activity, we show that different dynamical states generated by a same structural connectivity motif correspond to distinct effective connectivity motifs. Such effective motifs can display a dominant directionality, due to spontaneous symmetry breaking and effective entrainment between local brain rhythms, although all connections in the considered structural motifs are reciprocal [...] Finally, we analyze how the information encoded in spiking patterns of a local neuronal population is propagated across a fixed structural connectivity motif, demonstrating that changes in the active effective connectivity regulate both the efficiency and the directionality of information transfer [...] Going beyond these early proposals, we advance here that dynamic interactions between brain rhythms provide as well the basis for the self-organized control of this communication-through-coherence, making thus possible a fast on-demand reconfiguration of global information routing modalities." @default.
- W1974733263 created "2016-06-24" @default.
- W1974733263 creator A5006939924 @default.
- W1974733263 creator A5019365659 @default.
- W1974733263 creator A5028904221 @default.
- W1974733263 creator A5071892166 @default.
- W1974733263 date "2012-03-22" @default.
- W1974733263 modified "2023-10-14" @default.
- W1974733263 title "Dynamic Effective Connectivity of Inter-Areal Brain Circuits" @default.
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