Computational Neuroscience is the field in which mathematical tools and theories are used to investigate brain function. It focuses on the description of biologically plausible neurons (and neural systems) and their physiology and dynamics, and it is therefore not concerned with biologically unrealistic disciplines such as connectionism, artificial neural networks,machine learning, artificial intelligence and computational learning theory concept. It can also incorporate various approaches from electrical engineering & applied computer science so as to understand how the nervous system processes information.