Neural network), Computational neuroscience, as well as in several books by Ascoli, G. A. (2002),[1] Sterratt, D., Graham, B., Gillies, A., & Willshaw, D. (2011),[2] Gerstner, W., & Kistler, W. (2002),[3] and Rumelhart, J. L., McClelland, J. L., and PDP Research Group (1986)[4] among others. The focus of this article is a comprehensive view of modeling a neural network (technically neuronal network based on neuron model). Once an approach based on the perspective and connectivity is chosen, the models are developed at microscopic (ion and neuron), mesoscopic (functional or population), or macroscopic (system) levels.