Noise-induced synchronization in bidirectionally coupled type-I neurons
Potsdam Institute for Climate Impact Research, Telegrafenberg, 14412 Potsdam, Germany
2 Advanced Centre for Research in High Energy Materials (ACRHEM), University of Hyderabad, Central University PO, Gachi Bowli, Hyderabad - 500 046, India
3 School of Physics, University of Hyderabad, Central University PO, Gachi Bowli, Hyderabad - 500 046, India
Revised: 22 November 2009
Published online: 9 March 2010
We present here some studies on noise-induced order and synchronous firing in a system of bidirectionally coupled generic type-I neurons. We find that transitions from unsynchronized to completely synchronized states occur beyond a critical value of noise strength that has a clear functional dependence on neuronal coupling strength and input values. For an inhibitory-excitatory (IE) synaptic coupling, the approach to a partially synchronized state is shown to vary qualitatively depending on whether the input is less or more than a critical value. We find that introduction of noise can cause a delay in the bifurcation of the firing pattern of the excitatory neuron for IE coupling.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010