The brain is an organ with a complex structure and is composed of various types of cells. It is mainly composed of neurons and glia cells, and a higher brain function results from the formation of complex neuronal networks. What is the best way to understand the brain? One way is by understanding how molecular and cellular mechanisms are formed. Among them, it is important to know the molecular mechanisms by which neuronal networks are developed, a process initiated during early cell-cell interactions.
In addition, it is essential to understand the mechanism of signal transduction inside the cells during network formation at various developmental stages and also in the mature brain. The functions of the brain are multiple and complex – it is a centrally regulating organizing system of multiple simultaneous functions. As we begin to understand it, we recognize the specific functions and specific role individual cells have to perform, and the interactions of the cells that are needed for such functions. The understanding of these cell to cell interactions, which involve intracellular changes, is essential for understanding the multiple role of the brain, and also for understanding any change responsible for malfunction of this organ.