I. INTRODUCTION
Methods of multi-component stochastic systems theory are applied in many parts of biology on the molecular, cellular, genetic, and population levels; in computer science; in polymer chemistry; in seismology; in economics, and other sciences. From the probabilistic point of view, such systems are special cases of multidimensional Markov processes [1]. Two main principles are applied. The systems are treated as multi-component and homogeneous, i.e. all components have similar rules of behavior. Systems like these can be used to describe central nervous system functioning [2], [3].