Per accedir als documents amb el text complet, si us plau, seguiu el següent enllaç:

Phase-Coherence Transitions and Communication in the Gamma Range between Delay-Coupled Neuronal Populations
Barardi, Alessandro; Sancristóbal Alonso, Belén de; García Ojalvo, Jordi
Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear; Universitat Politècnica de Catalunya. DONLL - Dinàmica no lineal, òptica no lineal i làsers
Synchronization between neuronal populations plays an important role in information transmission between brain areas. In particular, collective oscillations emerging from the synchronized activity of thousands of neurons can increase the functional connectivity between neural assemblies by coherently coordinating their phases. This synchrony of neuronal activity can take place within a cortical patch or between different cortical regions. While short-range interactions between neurons involve just a few milliseconds, communication through long-range projections between different regions could take up to tens of milliseconds. How these heterogeneous transmission delays affect communication between neuronal populations is not well known. To address this question, we have studied the dynamics of two bidirectionally delayedcoupled neuronal populations using conductance-based spiking models, examining how different synaptic delays give rise to in-phase/anti-phase transitions at particular frequencies within the gamma range, and how this behavior is related to the phase coherence between the two populations at different frequencies. We have used spectral analysis and information theory to quantify the information exchanged between the two networks. For different transmission delays between the two coupled populations, we analyze how the local field potential and multi-unit activity calculated from one population convey information in response to a set of external inputs applied to the other population. The results confirm that zero-lag synchronization maximizes information transmission, although out-of-phase synchronization allows for efficient communication provided the coupling delay, the phase lag between the populations, and the frequency of the oscillations are properly matched.
Peer Reviewed
Àrees temàtiques de la UPC::Física
Àrees temàtiques de la UPC::Ciències de la salut::Medicina::Neurologia
Selective visual-attention
Fast network oscillations
Stimulus selection
Còrtex cerebral
Attribution-NonCommercial-NoDerivs 3.0 Spain

Mostra el registre complet del document

Documents relacionats

Altres documents del mateix autor/a

Sancristóbal Alonso, Belén de; Vicente, Raul; García Ojalvo, Jordi
Malagarriga Guasch, Daniel; Villa, Alessandro; García Ojalvo, Jordi; Pons Rivero, Antonio Javier
Malagarriga Guasch, Daniel; Villa, Alessandro; García Ojalvo, Jordi; Pons Rivero, Antonio Javier
Pons Rivero, Antonio Javier; Cantero, Jose Luis; Atienza, Mercedes; García Ojalvo, Jordi