Abstract
There are a variety of approaches to brain research. The numerical simulation of neural network using mathematical model is one of them, and it has been extensively studied until now. However, to comprehend the brain, it is necessary to take in for simulations various properties which the real brain has, and to verify the influences of them. Here we focus on the properties called "breaking of Dale’s principle" and "pre-synaptic control", then look at the effects of them on neural network's dynamics by numerical simulations. Below we show some parts of our results.