A linear model of phase-dependent power correlations in neuronal oscillations

Eriksson, David; Vicente, Raul; Schmidt, Kerstin Erika

A linear model of phase-dependent power correlations in neuronal oscillations

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dc.contributor.author	Eriksson, David
dc.contributor.author	Vicente, Raul
dc.contributor.author	Schmidt, Kerstin Erika
dc.date.accessioned	2017-05-23T11:42:01Z
dc.date.available	2017-05-23T11:42:01Z
dc.date.issued	2011-07-12
dc.description.resumo	Recently, it has been suggested that effective interactions between two neuronal populations are supported by the phase difference between the oscillations in these two populations, a hypothesis referred to as “communication through coherence” (CTC). Experimental work quantified effective interactions by means of the power correlations between the two populations, where power was calculated on the local field potential and/or multi-unit activity. Here, we present a linear model of interacting oscillators that accounts for the phase dependency of the power correlation between the two populations and that can be used as a reference for detecting nonlinearities such as gain control. In the experimental analysis, trials were sorted according to the coupled phase difference of the oscillators while the putative interaction between oscillations was taking place. Taking advantage of the modeling, we further studied the dependency of the power correlation on the uncoupled phase difference, connection strength, and topology. Since the uncoupled phase difference, i.e., the phase relation before the effective interaction, is the causal variable in the CTC hypothesis we also describe how power correlations depend on that variable. For uni-directional connectivity we observe that the width of the uncoupled phase dependency is broader than for the coupled phase. Furthermore, the analytical results show that the characteristics of the phase dependency change when a bidirectional connection is assumed. The width of the phase dependency indicates which oscillation frequencies are optimal for a given connection delay distribution. We propose that a certain width enables a stimulus-contrast dependent extent of effective long-range lateral connections.	pt_BR
dc.identifier.citation	Eriksson D, Vicente R and Schmidt K (2011) A linear model of phasedependent power correlations in neuronal oscillations. Front. Comput. Neurosci. 5:34. doi: 10.3389/fncom.2011.00034	pt_BR
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/23049
dc.language	eng	pt_BR
dc.rights	Acesso Aberto	pt_BR
dc.subject	communication through coherence	pt_BR
dc.subject	power correlation	pt_BR
dc.subject	phase relation, axonal delays	pt_BR
dc.subject	neuronal oscillations	pt_BR
dc.title	A linear model of phase-dependent power correlations in neuronal oscillations	pt_BR
dc.type	article	pt_BR