Abstract
A cortical network shows the noisy electrical activity of the brain, even in the absence of sensory stimulation. This is called spontaneous activity and indicates an irregular neuronal spiking with a low firing rate but high coherent spike transmission between specific neurons. Recently, Teramae et al. used a leaky integrate-and-fire (LIF) neuron model to propose that these features could be caused by synaptic weights that follow a log-normal distribution. However, the LIF neuron model does not account for several neurodynamic factors. Therefore, to prove the physiological possibility of their hypothesis, it is necessary to study the effects of these missing neurodynamic factors on the spontaneous spiking activity. In this chapter, focusing on the Izhikevich neuron model, we examine the characteristics of spike transmission compared with the results of the LIF neural system.
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