Summary

Proceedings of the 2012 International Symposium on Nonlinear Theory and its Applications

2012

Session Number:C1L-B

Session:

Number:559

Reciprocal connectivity enhances frequency locking and phase coherence between gamma oscillations

B. Sancristóbal,  R. Vicente,  G. Pipa,  J. Garcia-Ojalvo,  

pp.559-562

Publication Date:

Online ISSN:2188-5079

DOI:10.15248/proc.1.559

PDF download (383.2KB)

The power spectrum of electrical signals recorded from the cortex shows distinct peaks at a variety of frequencies. In this work we study under which conditions two areas oscillating at initially different rhythms can lock their frequencies in the gamma band (30-90 Hz) by virtue of their synaptic interactions. To do so, we investigated the effect that the coupling topology, synaptic strength, and frequency detuning had on the emergence of locking and phase coherence between two conductance-based neuronal populations. Two measures of neuronal activity, local field potentials (LFP) and multi-unit activity (MUA) were extracted from the simulations to bridge the gap with experimental popular measures. Reciprocal topologies (bidirectional) favored the appearance of frequency locking and phase coherence, and thus offer a more robust connectivity for mechanisms exploiting the control of the coherence of neuronal oscillations as a flexible communication gating.

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